Range of Motion, Articular
Pattern Recognition, Visual
Motion Pictures as Topic
Motion Therapy, Continuous Passive
Respiratory-Gated Imaging Techniques
Image Processing, Computer-Assisted
Reproducibility of Results
Magnetic Resonance Imaging
Image Interpretation, Computer-Assisted
Time and Motion Studies
Signal Detection, Psychological
Sensitivity and Specificity
Evoked Potentials, Visual
Molecular Dynamics Simulation
Radiotherapy Planning, Computer-Assisted
Analysis of Variance
Space Motion Sickness
Total Disc Replacement
Magnetic Resonance Spectroscopy
Cardiac-Gated Imaging Techniques
Magnetic Resonance Imaging, Cine
Nuclear Magnetic Resonance, Biomolecular
Ventricular Function, Left
Recovery of Function
Molecular Motor Proteins
Equipment Failure Analysis
Tomography, Emission-Computed, Single-Photon
Gated Blood-Pool Imaging
Physical Therapy Modalities
Radiographic Image Interpretation, Computer-Assisted
Protein Structure, Secondary
Cone-Beam Computed Tomography
Task Performance and Analysis
Ventricular Dysfunction, Left
Protein Structure, Tertiary
Signal Processing, Computer-Assisted
The forward rate of binding of surface-tethered reactants: effect of relative motion between two surfaces. (1/2370)The reaction of molecules confined to two dimensions is of interest in cell adhesion, specifically for the reaction between cell surface receptors and substrate-bound ligand. We have developed a model to describe the overall rate of reaction of species that are bound to surfaces under relative motion, such that the Peclet number is order one or greater. The encounter rate between reactive species is calculated from solution of the two-dimensional convection-diffusion equation. The probability that each encounter will lead to binding depends on the intrinsic rate of reaction and the encounter duration. The encounter duration is obtained from the theory of first passage times. We find that the binding rate increases with relative velocity between the two surfaces, then reaches a plateau. This plateau indicates that the increase in the encounter rate is counterbalanced by the decrease in the encounter duration as the relative velocity increases. The binding rate is fully described by two dimensionless parameters, the Peclet number and the Damkohler number. We use this model to explain data from the cell adhesion literature by incorporating these rate laws into "adhesive dynamics" simulations to model the binding of a cell to a surface under flow. Leukocytes are known to display a "shear threshold effect" when binding selectin-coated surfaces under shear flow, defined as an increase in bind rate with shear; this effect, as calculated here, is due to an increase in collisions between receptor and ligand with increasing shear. The model can be used to explain other published data on the effect of wall shear rate on the binding of cells to surfaces, specifically the mild decrease in binding within a fixed area with increasing shear rate. (+info)
Synchronization of local neural networks in the somatosensory cortex: A comparison of stationary and moving stimuli. (2/2370)Spontaneous and stimulus-induced responses were recorded from neighboring groups of neurons by an array of electrodes in the primary (SI) somatosensory cortex of intact, halothane-anesthetized cats. Cross-correlation analysis was used to characterize the coordination of spontaneous activity and the responses to peripheral stimulation with moving or stationary air jets. Although synchronization was detected in only 10% (88 of 880) of the pairs of single neurons that were recorded, cross-correlation analysis of multiunit responses revealed significant levels of synchronization in 64% of the 123 recorded electrode pairs. Compared with spontaneous activity, both stationary and moving air jets caused substantial increases in the rate, proportion, and temporal precision of synchronized activity in local regions of SI cortex. Among populations of neurons that were synchronized by both types of air-jet stimulation, the mean rate of synchronized activity was significantly higher during moving air-jet stimulation than during stationary air-jet stimulation. Moving air jets also produced significantly higher correlation coefficients than stationary air jets in the raw cross-correlograms (CCGs) but not in the shift-corrected CCGs. The incidence and rate of stimulus-induced synchronization varied with the distance separating the recording sites. For sites separated by /=500 microm, only 37% of the multiunit responses were synchronized by discrete stimulation with a single air jet. Measurements of the multiunit CCG peak half-widths showed that the correlated activity produced by moving air jets had slightly less temporal variability than that produced by stationary air jets. These results indicate that moving stimuli produce greater levels of synchronization than stationary stimuli among local groups of SI neurons and suggest that neuronal synchronization may supplement the changes in firing rate which code intensity and other attributes of a cutaneous stimulus. (+info)
DNA translocation blockage, a general mechanism of cleavage site selection by type I restriction enzymes. (3/2370)Type I restriction enzymes bind to a specific DNA sequence and subsequently translocate DNA past the complex to reach a non-specific cleavage site. We have examined several potential blocks to DNA translocation, such as positive supercoiling or a Holliday junction, for their ability to trigger DNA cleavage by type I restriction enzymes. Introduction of positive supercoiling into plasmid DNA did not have a significant effect on the rate of DNA cleavage by EcoAI endonuclease nor on the enzyme's ability to select cleavage sites randomly throughout the DNA molecule. Thus, positive supercoiling does not prevent DNA translocation. EcoR124II endonuclease cleaved DNA at Holliday junctions present on both linear and negatively supercoiled substrates. The latter substrate was cleaved by a single enzyme molecule at two sites, one on either side of the junction, consistent with a bi-directional translocation model. Linear DNA molecules with two recognition sites for endonucleases from different type I families were cut between the sites when both enzymes were added simultaneously but not when a single enzyme was added. We propose that type I restriction enzymes can track along a DNA substrate irrespective of its topology and cleave DNA at any barrier that is able to halt the translocation process. (+info)
Sensitivity to simulated directional sound motion in the rat primary auditory cortex. (4/2370)Sensitivity to simulated directional sound motion in the rat primary auditory cortex. This paper examines neuron responses in rat primary auditory cortex (AI) during sound stimulation of the two ears designed to simulate sound motion in the horizontal plane. The simulated sound motion was synthesized from mathematical equations that generated dynamic changes in interaural phase, intensity, and Doppler shifts at the two ears. The simulated sounds were based on moving sources in the right frontal horizontal quadrant. Stimuli consisted of three circumferential segments between 0 and 30 degrees, 30 and 60 degrees, and 60 and 90 degrees and four radial segments at 0, 30, 60, and 90 degrees. The constant velocity portion of each segment was 0.84 m long. The circumferential segments and center of the radial segments were calculated to simulate a distance of 2 m from the head. Each segment had two trajectories that simulated motion in both directions, and each trajectory was presented at two velocities. Young adult rats were anesthetized, the left primary auditory cortex was exposed, and microelectrode recordings were obtained from sound responsive cells in AI. All testing took place at a tonal frequency that most closely approximated the best frequency of the unit at a level 20 dB above the tuning curve threshold. The results were presented on polar plots that emphasized the two directions of simulated motion for each segment rather than the location of sound in space. The trajectory exhibiting a "maximum motion response" could be identified from these plots. "Neuron discharge profiles" within these trajectories were used to demonstrate neuron activity for the two motion directions. Cells were identified that clearly responded to simulated uni- or multidirectional sound motion (39%), that were sensitive to sound location only (19%), or that were sound driven but insensitive to our location or sound motion stimuli (42%). The results demonstrated the capacity of neurons in rat auditory cortex to selectively process dynamic stimulus conditions representing simulated motion on the horizontal plane. Our data further show that some cells were responsive to location along the horizontal plane but not sensitive to motion. Cells sensitive to motion, however, also responded best to the moving sound at a particular location within the trajectory. It would seem that the mechanisms underlying sensitivity to sound location as well as direction of motion converge on the same cell. (+info)
Vertical eye position-dependence of the human vestibuloocular reflex during passive and active yaw head rotations. (5/2370)Vertical eye position-dependence of the human vestibuloocular reflex during passive and active yaw head rotations. The effect of vertical eye-in-head position on the compensatory eye rotation response to passive and active high acceleration yaw head rotations was examined in eight normal human subjects. The stimuli consisted of brief, low amplitude (15-25 degrees ), high acceleration (4,000-6,000 degrees /s2) yaw head rotations with respect to the trunk (peak velocity was 150-350 degrees /s). Eye and head rotations were recorded in three-dimensional space using the magnetic search coil technique. The input-output kinematics of the three-dimensional vestibuloocular reflex (VOR) were assessed by finding the difference between the inverted eye velocity vector and the head velocity vector (both referenced to a head-fixed coordinate system) as a time series. During passive head impulses, the head and eye velocity axes aligned well with each other for the first 47 ms after the onset of the stimulus, regardless of vertical eye-in-head position. After the initial 47-ms period, the degree of alignment of the eye and head velocity axes was modulated by vertical eye-in-head position. When fixation was on a target 20 degrees up, the eye and head velocity axes remained well aligned with each other. However, when fixation was on targets at 0 and 20 degrees down, the eye velocity axis tilted forward relative to the head velocity axis. During active head impulses, the axis tilt became apparent within 5 ms of the onset of the stimulus. When fixation was on a target at 0 degrees, the velocity axes remained well aligned with each other. When fixation was on a target 20 degrees up, the eye velocity axis tilted backward, when fixation was on a target 20 degrees down, the eye velocity axis tilted forward. The findings show that the VOR compensates very well for head motion in the early part of the response to unpredictable high acceleration stimuli-the eye position- dependence of the VOR does not become apparent until 47 ms after the onset of the stimulus. In contrast, the response to active high acceleration stimuli shows eye position-dependence from within 5 ms of the onset of the stimulus. A model using a VOR-Listing's law compromise strategy did not accurately predict the patterns observed in the data, raising questions about how the eye position-dependence of the VOR is generated. We suggest, in view of recent findings, that the phenomenon could arise due to the effects of fibromuscular pulleys on the functional pulling directions of the rectus muscles. (+info)
Lumbar intradiscal pressure after posterolateral fusion and pedicle screw fixation. (6/2370)In vitro biomechanical testing was performed in single-functional spinal units of fresh calf lumbar spines, using pressure needle transducers to investigate the effect of posterolateral fusion (PLF) and pedicle screw constructs (PS) on intradiscal pressure (IDP), in order to elucidate the mechanical factors concerned with residual low back pain after PLF. IDP of 6 calf lumbar spines consisting of L4 and L5 vertebrae and an intervening disc was measured under axial compression, flexion-extension and lateral bending in the intact spine, PS, PLF and the destabilized spine. Relative to the intact spines, the destabilized spines showed increased IDP in all of lordings and moments. IDP under PS and PLF were significantly decreased in axial compression, extension and lateral bending loads (p<0.05). In flexion, IDP under PS and PLF increased linearly proportional to the magnitude of flexion moment and reached as high as IDP of the intact spines. These results demonstrated that despite an increase in the stiffness of motion segments after PLF and PS, significant high disc pressure is still generated in flexion. Flexibility of PS and PLF may cause increased axial load sharing of the disc in flexion and increased IDP. This high IDP may explain patients' persisting pain following PS and PLF. (+info)
Electromyographic study of the elbow flexors and extensors in a motion of forearm pronation/supination while maintaining elbow flexion in humans. (7/2370)Activities of the elbow flexors (biceps brachii, BB; brachialis, B; brachioradialis, BR) and extensors (triceps brachii, TB) in a motion of forearm pronation/supination with maintenance of elbow flexion (PS-movement) in nine healthy human subjects were studied by electromyography (EMG). The subject performed the PS-movement slowly or quickly with or without a load extending the elbow. In the slow PS-movement, an increase and decrease of EMG activities during supination and pronation, respectively, were seen in BB and the reverse was in B. A clear increment of EMG activities in BB accompanied with a reduction of EMG activities in B and/or BR, and the reverse were often observed. The contraction level and gain with the forearm supine were higher and larger than those with the forearm prone, respectively, in BB and the reverse was in B and BR. In a series of the quick PS-movement, alternating increases of EMG activities between BB and the other flexors (B and BR) were seen. Since TB showed no EMG activities throughout the experiment, it is suggested that reciprocal contractions between BB and the other flexors, which produce a complementary force in flexion direction, enable motions of pronation/supination with maintenance of flexion. Contraction properties of the flexors were discussed. (+info)
Direct measurement of inter-doublet elasticity in flagellar axonemes. (8/2370)The outer doublet microtubules in ciliary and flagellar axonemes are presumed to be connected with each other by elastic links called the inter-doublet links or the nexin links, but it is not known whether there actually are such elastic links. In this study, to detect the elasticity of the putative inter-doublet links, shear force was applied to Chlamydomonas axonemes with a fine glass needle and the longitudinal elasticity was determined from the deflection of the needle. Wild-type axonemes underwent a high-frequency, nanometer-scale vibration in the presence of ATP. When longitudinal shear force was applied, the average position of the needle tip attached to the axoneme moved linearly with the force applied, yielding an estimate of spring constant of 2.0 (S.D.: 0.8) pN/nm for 1 microm of axoneme. This value did not change in the presence of vanadate, i.e., when dynein does not form strong cross bridges. In contrast, it was at least five times larger when ATP was absent, i.e., when dynein forms strong cross bridges. The measured elasticity did not significantly differ in various mutant axonemes lacking the central-pair microtubules, a subset of inner-arm dynein, outer-arm dynein, or the radial spokes, although it was somewhat smaller in the latter two mutants. It was also observed that the shear displacement in an axoneme in the presence of ATP often took place in a stepwise manner. This suggests that the inter-doublet links can reversibly detach from and reattach to the outer doublets in a cooperative manner. This study thus provides the first direct measure of the elasticity of inter-doublet links and also demonstrates its dynamic nature. (+info)
The inner ear, brain, and sensory nerves are all involved in the development of motion sickness. The inner ear contains the vestibular system, which is responsible for maintaining balance and equilibrium. The brain processes visual, proprioceptive (position and movement), and vestibular information to determine the body's position and movement. When these signals are not in harmony, the brain can become confused and motion sickness can occur.
There are several factors that can contribute to the development of motion sickness, including:
1. Conflicting sensory input: This can occur when the visual, proprioceptive, and vestibular systems provide conflicting information about the body's position and movement. For example, if the body is moving but the eyes do not see any movement, this can confuse the brain and lead to motion sickness.
2. Movement of the body: Motion sickness can occur when the body is in motion, such as on a boat or airplane, or during a car ride. This can be particularly problematic for people who are prone to motion sickness.
3. Reading or looking at screens: Reading or looking at screens can exacerbate motion sickness, as it can provide conflicting visual and vestibular information.
4. Other medical conditions: Certain medical conditions, such as inner ear problems or migraines, can increase the risk of developing motion sickness.
5. Medications: Some medications, such as antidepressants and antihistamines, can increase the risk of developing motion sickness.
There are several ways to prevent and treat motion sickness, including:
1. Avoiding heavy meals before traveling: Eating a light meal before traveling can help reduce the risk of motion sickness.
2. Choosing a seat with less motion: In vehicles, choosing a seat with less motion can help reduce the risk of motion sickness.
3. Keeping the eyes on the horizon: Looking at the horizon can help reduce the conflict between visual and vestibular information.
4. Taking medication: There are several over-the-counter and prescription medications available to prevent and treat motion sickness, such as dramamine and scopolamine patches.
5. Using wristbands: Sea bands or wristbands that apply pressure to a specific point on the wrist have been shown to be effective in preventing motion sickness.
6. Avoiding alcohol and caffeine: Consuming these substances can exacerbate motion sickness, so it is best to avoid them before and during travel.
7. Staying hydrated: Drinking plenty of water and other fluids can help reduce the symptoms of motion sickness.
8. Getting fresh air: Fresh air can help reduce the symptoms of motion sickness, so it is best to sit near an open window or take breaks outside.
There are several types of penetrating eye injuries, including:
1. Perforating injuries: These occur when an object punctures the globe of the eye, creating a hole in the retina or the sclera. These injuries can be life-threatening and require immediate medical attention.
2. Non-perforating injuries: These occur when an object does not penetrate the globe of the eye but still causes damage to the surrounding tissues. These injuries are typically less severe than perforating injuries but can still cause significant vision loss.
3. Hyphemas: These occur when blood collects in the space between the cornea and the iris, often due to a blow to the eye.
4. Retinal detachments: These occur when the retina becomes separated from the underlying tissue, often due to a traumatic injury.
Symptoms of penetrating eye injuries can include:
* Severe pain in the eye
* Redness and swelling of the affected eye
* Difficulty seeing or blindness
* Floaters or flashes of light
* A feeling of something in the eye
Treatment of penetrating eye injuries depends on the severity of the injury and can include:
1. Immediate medical attention to assess the extent of the injury and provide appropriate treatment.
2. Surgery to repair any damage to the eye, such as removing a foreign object or repairing a retinal detachment.
3. Antibiotics to prevent infection.
4. Pain management with medication.
5. Monitoring for complications, such as glaucoma or cataracts.
Preventive measures for penetrating eye injuries include:
1. Wearing protective eyewear when performing activities that could potentially cause eye injury, such as playing sports or working with power tools.
2. Avoiding touching the eyes or face to prevent the spread of infection.
3. Keeping the environment clean and free of hazards to reduce the risk of injury.
4. Properly storing and disposing of sharp objects to prevent accidents.
5. Seeking medical attention immediately if an eye injury occurs.
It is important to seek immediate medical attention if you experience any symptoms of a penetrating eye injury, as timely treatment can help prevent complications and improve outcomes.
Some common types of perceptual disorders include:
1. Visual perceptual disorders: These disorders affect an individual's ability to interpret and make sense of visual information from the environment. They can result in difficulties with recognizing objects, perceiving depth and distance, and tracking movement.
2. Auditory perceptual disorders: These disorders affect an individual's ability to interpret and make sense of sound. They can result in difficulties with hearing and understanding speech, as well as distinguishing between different sounds.
3. Tactile perceptual disorders: These disorders affect an individual's ability to interpret and make sense of touch. They can result in difficulties with recognizing objects through touch, as well as interpreting tactile sensations such as pain, temperature, and texture.
4. Olfactory perceptual disorders: These disorders affect an individual's ability to interpret and make sense of smells. They can result in difficulties with identifying different odors and distinguishing between them.
5. Gustatory perceptual disorders: These disorders affect an individual's ability to interpret and make sense of tastes. They can result in difficulties with identifying different flavors and distinguishing between them.
6. Balance and equilibrium disorders: These disorders affect an individual's ability to maintain balance and equilibrium. They can result in difficulties with standing, walking, and maintaining posture.
Perceptual disorders can have a significant impact on an individual's daily life, making it difficult to perform everyday tasks and activities. Treatment for perceptual disorders often involves a combination of sensory therapy, behavioral therapy, and assistive technologies. The goal of treatment is to help the individual compensate for any impairments in sensory processing and improve their ability to function in daily life.
In medicine, cadavers are used for a variety of purposes, such as:
1. Anatomy education: Medical students and residents learn about the human body by studying and dissecting cadavers. This helps them develop a deeper understanding of human anatomy and improves their surgical skills.
2. Research: Cadavers are used in scientific research to study the effects of diseases, injuries, and treatments on the human body. This helps scientists develop new medical techniques and therapies.
3. Forensic analysis: Cadavers can be used to aid in the investigation of crimes and accidents. By examining the body and its injuries, forensic experts can determine cause of death, identify suspects, and reconstruct events.
4. Organ donation: After death, cadavers can be used to harvest organs and tissues for transplantation into living patients. This can improve the quality of life for those with organ failure or other medical conditions.
5. Medical training simulations: Cadavers can be used to simulate real-life medical scenarios, allowing healthcare professionals to practice their skills in a controlled environment.
In summary, the term "cadaver" refers to the body of a deceased person and is used in the medical field for various purposes, including anatomy education, research, forensic analysis, organ donation, and medical training simulations.
The symptoms of SMS can include:
* Nausea and vomiting
* Dizziness and disorientation
* Headaches and fatigue
* Cold sweats and pale skin
* Increased heart rate and blood pressure
SMS is caused by a conflict between what the body perceives as movement and what the eyes see. In space, the body may feel motion while the eyes do not see any movement, leading to confusion and disorientation. Additionally, the low gravity environment can also contribute to the development of SMS.
Treatment for SMS includes:
* Medications such as scopolamine patches or antihistamines to help reduce symptoms
* Avoiding heavy meals and alcohol before and during space travel
* Keeping the head still and avoiding reading or watching screens that can make the symptoms worse
* Avoiding stressful situations and taking breaks in a quiet, dark area
Prevention is key to managing SMS. By understanding the risk factors and taking steps to minimize them, individuals can reduce their chances of developing this condition. For example, astronauts are advised to take certain precautions before and during space travel, such as avoiding heavy meals and alcohol, getting enough rest, and using medications as needed.
In conclusion, Space Motion Sickness is a common condition that affects individuals who experience motion in spacecraft or other enclosed environments. It can cause a range of symptoms, including nausea, dizziness, and disorientation. Treatment and prevention involve avoiding risk factors, using medications as needed, and taking breaks in quiet, dark areas to help the body adjust to the low gravity environment. By understanding the causes and risk factors for SMS, individuals can take steps to minimize its impact on their space travel experience.
There are several types of joint instability, including:
1. Ligamentous laxity: A condition where the ligaments surrounding a joint become stretched or torn, leading to instability.
2. Capsular laxity: A condition where the capsule, a thin layer of connective tissue that surrounds a joint, becomes stretched or torn, leading to instability.
3. Muscular imbalance: A condition where the muscles surrounding a joint are either too weak or too strong, leading to instability.
4. Osteochondral defects: A condition where there is damage to the cartilage and bone within a joint, leading to instability.
5. Post-traumatic instability: A condition that develops after a traumatic injury to a joint, such as a dislocation or fracture.
Joint instability can be caused by various factors, including:
1. Trauma: A sudden and forceful injury to a joint, such as a fall or a blow.
2. Overuse: Repeated stress on a joint, such as from repetitive motion or sports activities.
3. Genetics: Some people may be born with joint instability due to inherited genetic factors.
4. Aging: As we age, our joints can become less stable due to wear and tear on the cartilage and other tissues.
5. Disease: Certain diseases, such as rheumatoid arthritis or osteoarthritis, can cause joint instability.
Symptoms of joint instability may include:
1. Pain: A sharp, aching pain in the affected joint, especially with movement.
2. Stiffness: Limited range of motion and stiffness in the affected joint.
3. Swelling: Swelling and inflammation in the affected joint.
4. Instability: A feeling of looseness or instability in the affected joint.
5. Crepitus: Grinding or crunching sensations in the affected joint.
Treatment for joint instability depends on the underlying cause and may include:
1. Rest and ice: Resting the affected joint and applying ice to reduce pain and swelling.
2. Physical therapy: Strengthening the surrounding muscles to support the joint and improve stability.
3. Bracing: Using a brace or splint to provide support and stability to the affected joint.
4. Medications: Anti-inflammatory medications, such as ibuprofen or naproxen, to reduce pain and inflammation.
5. Surgery: In severe cases, surgery may be necessary to repair or reconstruct the damaged tissues and improve joint stability.
Endometritis is a medical condition that affects the endometrium, which is the lining of the uterus. It can cause painful symptoms such as vaginal discharge, fever and abdominal pain. Treatment usually involves antibiotics to clear any infections, hormonal medications to reduce inflammation and promote healing. In severe cases surgery may be necessary to remove infected tissue or repair damaged structures.
Endometritis is an inflammatory condition that affects the endometrium, which lines the uterus. Symptoms include vaginal discharge, fever, painful urination, and abdominal pain. Treatment typically involves antibiotics to clear up any underlying infections, as well as hormonal medications to reduce inflammation and promote healing. In severe cases, surgery may be necessary to remove infected tissue or repair damaged structures.
Endometritis is an inflammatory condition that affects the endometrium, which is the lining of the uterus. It can cause a range of symptoms including vaginal discharge, fever, painful urination and abdominal pain. Treatment typically involves antibiotics to clear up any underlying infections and hormonal medications to reduce inflammation and promote healing. In severe cases surgery may be necessary to remove infected tissue or repair damaged structures.
Endometritis is a medical condition that affects the endometrium, which lines the uterus. Symptoms can include vaginal discharge, fever, painful urination, and abdominal pain. Treatment options may involve antibiotics to clear up any underlying infections as well as hormonal medications to reduce inflammation and promote healing. In severe cases, surgery may be necessary to remove infected tissue or repair damaged structures.
Endometritis is an inflammatory condition that affects the endometrium which lines the uterus. Symptoms can include vaginal discharge fever painful urination and abdominal pain Treatment options may involve antibiotics to clear up any underlying infections as well as hormonal medications to reduce inflammation and promote healing In severe cases surgery may be necessary to remove infected tissue or repair damaged structures.
The syndrome is named after the two doctors who first described it in 1929: John P. Mallory and H.C. Weiss. The condition is relatively rare, but it can occur in people of all ages, including children and young adults.
Symptoms of Mallory-Weiss syndrome may include vomiting blood or passing black tarry stools, dizziness or fainting, and shortness of breath. Diagnosis is based on endoscopy, which allows doctors to visualize the inside of the esophagus and stomach and identify any tears or ulcers.
Treatment usually involves endoscopic therapy, such as cautery or sclerotherapy, to close off the bleeding vessel and stop the bleeding. In severe cases, surgery may be necessary. The prognosis is generally good if the condition is diagnosed and treated promptly, but in rare cases, it can lead to life-threatening complications such as hypovolemic shock or cardiac arrhythmias.
Prevention of Mallory-Weiss syndrome includes avoiding activities that can cause vomiting or straining during bowel movements, such as excessive alcohol consumption or eating spicy or fatty foods. Medications such as antacids or antiemetic drugs may also be prescribed to help prevent the condition.
In summary, Mallory-Weiss syndrome is a rare but potentially life-threatening bleeding disorder that can occur when there is a tear in the blood vessel wall in the esophagus or stomach. It is important to seek medical attention immediately if symptoms of the condition are present to prevent complications and ensure prompt treatment.
There are several potential causes of LVD, including:
1. Coronary artery disease: The buildup of plaque in the coronary arteries can lead to a heart attack, which can damage the left ventricle and impair its ability to function properly.
2. Heart failure: When the heart is unable to pump enough blood to meet the body's needs, it can lead to LVD.
3. Cardiomyopathy: This is a condition where the heart muscle becomes weakened or enlarged, leading to impaired function of the left ventricle.
4. Heart valve disease: Problems with the heart valves can disrupt the normal flow of blood and cause LVD.
5. Hypertension: High blood pressure can cause damage to the heart muscle and lead to LVD.
6. Genetic factors: Some people may be born with genetic mutations that predispose them to developing LVD.
7. Viral infections: Certain viral infections, such as myocarditis, can inflame and damage the heart muscle, leading to LVD.
8. Alcohol or drug abuse: Substance abuse can damage the heart muscle and lead to LVD.
9. Nutritional deficiencies: A diet lacking essential nutrients can lead to damage to the heart muscle and increase the risk of LVD.
Diagnosis of LVD typically involves a physical exam, medical history, and results of diagnostic tests such as electrocardiograms (ECGs), echocardiograms, and stress tests. Treatment options for LVD depend on the underlying cause, but may include medications to improve cardiac function, lifestyle changes, and in severe cases, surgery or other procedures.
Preventing LVD involves taking steps to maintain a healthy heart and reducing risk factors such as high blood pressure, smoking, and obesity. This can be achieved through a balanced diet, regular exercise, stress management, and avoiding substance abuse. Early detection and treatment of underlying conditions that increase the risk of LVD can also help prevent the condition from developing.
There are different types of contractures, including:
1. Scar contracture: This type of contracture occurs when a scar tissue forms and tightens, causing a loss of movement in the affected area.
2. Neurogenic contracture: This type of contracture is caused by nerve damage and can occur after an injury or surgery.
3. Post-burn contracture: This type of contracture occurs after a burn injury and is caused by scarring and tightening of the skin and underlying tissues.
4. Congenital contracture: This type of contracture is present at birth and can be caused by genetic or environmental factors.
Signs and symptoms of contractures may include:
1. Limited range of motion
2. Pain or stiffness in the affected area
3. Skin tightening or shrinkage
4. Deformity of the affected area
Treatment options for contractures depend on the severity and cause of the condition, and may include:
1. Physical therapy to improve range of motion and strength
2. Bracing to support the affected area and prevent further tightening
3. Surgery to release or lengthen the scar tissue or tendons
4. Injections of botulinum toxin or other medications to relax the muscle and improve range of motion.
Esotropia is often diagnosed in children, and it can affect one or both eyes. Treatment for esotropia usually involves glasses or contact lenses to correct vision problems, as well as exercises to strengthen the muscles that control eye movement. In some cases, surgery may be necessary to realign the eyes.
Esotropia can also be associated with other conditions, such as craniosynostosis (a condition where the bones of the skull fuse together too early), or Down syndrome. It is important for parents and caregivers to be aware of the signs of esotropia, such as crossing or turning of the eyes, and to seek medical attention if they suspect that their child may have this condition. Early diagnosis and treatment can help prevent long-term vision problems and improve the overall quality of life for children with esotropia.
Some common types of spinal diseases include:
1. Degenerative disc disease: This is a condition where the discs between the vertebrae in the spine wear down over time, leading to pain and stiffness in the back.
2. Herniated discs: This occurs when the gel-like center of a disc bulges out through a tear in the outer layer, putting pressure on nearby nerves and causing pain.
3. Spinal stenosis: This is a narrowing of the spinal canal, which can put pressure on the spinal cord and nerve roots, causing pain, numbness, and weakness in the legs.
4. Spondylolisthesis: This is a condition where a vertebra slips out of place, either forward or backward, and can cause pressure on nearby nerves and muscles.
5. Scoliosis: This is a curvature of the spine that can be caused by a variety of factors, including genetics, injury, or disease.
6. Spinal infections: These are infections that can affect any part of the spine, including the discs, vertebrae, and soft tissues.
7. Spinal tumors: These are abnormal growths that can occur in the spine, either primary ( originating in the spine) or metastatic (originating elsewhere in the body).
8. Osteoporotic fractures: These are fractures that occur in the spine as a result of weakened bones due to osteoporosis.
9. Spinal cysts: These are fluid-filled sacs that can form in the spine, either as a result of injury or as a congenital condition.
10. Spinal degeneration: This is a general term for any type of wear and tear on the spine, such as arthritis or disc degeneration.
If you are experiencing any of these conditions, it is important to seek medical attention to receive an accurate diagnosis and appropriate treatment.
There are different types of myocardial infarctions, including:
1. ST-segment elevation myocardial infarction (STEMI): This is the most severe type of heart attack, where a large area of the heart muscle is damaged. It is characterized by a specific pattern on an electrocardiogram (ECG) called the ST segment.
2. Non-ST-segment elevation myocardial infarction (NSTEMI): This type of heart attack is less severe than STEMI, and the damage to the heart muscle may not be as extensive. It is characterized by a smaller area of damage or a different pattern on an ECG.
3. Incomplete myocardial infarction: This type of heart attack is when there is some damage to the heart muscle but not a complete blockage of blood flow.
4. Collateral circulation myocardial infarction: This type of heart attack occurs when there are existing collateral vessels that bypass the blocked coronary artery, which reduces the amount of damage to the heart muscle.
Symptoms of a myocardial infarction can include chest pain or discomfort, shortness of breath, lightheadedness, and fatigue. These symptoms may be accompanied by anxiety, fear, and a sense of impending doom. In some cases, there may be no noticeable symptoms at all.
Diagnosis of myocardial infarction is typically made based on a combination of physical examination findings, medical history, and diagnostic tests such as an electrocardiogram (ECG), cardiac enzyme tests, and imaging studies like echocardiography or cardiac magnetic resonance imaging.
Treatment of myocardial infarction usually involves medications to relieve pain, reduce the amount of work the heart has to do, and prevent further damage to the heart muscle. These may include aspirin, beta blockers, ACE inhibitors or angiotensin receptor blockers, and statins. In some cases, a procedure such as angioplasty or coronary artery bypass surgery may be necessary to restore blood flow to the affected area.
Prevention of myocardial infarction involves managing risk factors such as high blood pressure, high cholesterol, smoking, diabetes, and obesity. This can include lifestyle changes such as a healthy diet, regular exercise, and stress reduction, as well as medications to control these conditions. Early detection and treatment of heart disease can help prevent myocardial infarction from occurring in the first place.
Repetitive Motion Disorders | National Institute of Neurological Disorders and Stroke
Motion Sickness | CDC Yellow Book 2024
Create Motion Graphics for Your Videos | Adobe
Identities in Motion 4
Apple Motion 5 | iLounge
Cable Manufacturing & Assembly Has Acquired Cablecraft Motion Controls
COPD Motion Graphic
Replicator timing in Motion - Apple Support (KW)
Perpetual motion machine Definition & Meaning - Merriam-Webster
If I'm Honest Motion Design
Motion Math: Helping Drive iPad and Education Research | WIRED
Motion Dance Academy
Global motion events
Laws of motion 4 - MATLAB Cody - MATLAB Central
Type On And Off - Apple Motion 5 [Video]
Kids in Motion 2017 Member Events
Golden Globe Award for Best Supporting Actress - Motion Picture - Wikipedia
Motion Terminal | Festo LT
LG Motion 4G - Wikipédia
project motion - PhET Придонес
ALPINA B7 In Motion
NIMH » Coherent motion
EFF's Motion for De Novo Determination | Electronic Frontier Foundation
Measurement function for constant turn-rate motion - MATLAB ctmeas
Peer Review of DE Spring Motion Demo
Stop-Motion Film Made with Coins - Neatorama
Judge denies motion to relocate Schabusiness trial
Treating motion sickness1
- Complementary approaches with anecdotal evidence of effectiveness for preventing or treating motion sickness (e.g., acupressure and magnets, ginger, homeopathic remedies, pyridoxine [vitamin B6]) might be effective for individual travelers but cannot generally be recommended (see Sec. 2, Ch. 14, Complementary & Integrative Health Approaches to Travel Wellness ). (cdc.gov)
- Treatment includes reducing or stopping the motions that cause symptoms. (nih.gov)
- For a complete list of motion sickness-associated signs and symptoms, see Box 8-06 . (cdc.gov)
- Awareness and avoidance of situations that tend to trigger symptoms are the primary defenses against motion sickness. (cdc.gov)
- Being sleep-deprived can worsen motion sickness symptoms. (cdc.gov)
- Most people, in time, notice a reduction in motion sickness symptoms. (cdc.gov)
- Motion sickness - the discomfort experienced when perceived motion disturbs the organs of balance - may include symptoms such as nausea, vomiting, pallor, cold sweats, hypersalivation, hyperventilation and headaches. (nih.gov)
- Potentially, the use of sensors to monitor personal motion could be very cost effective because a lot of person-time (e.g., getting individuals to doctor's offices or medical centers, or having health researchers/professionals going to someone's home) could be saved. (nih.gov)
- This paper explores an approach for extracting scene text ferent random depths, and thus do not satisfy the planar from a sequence of images with relative motion between the constraint. (nih.gov)
- You can achieve maximum process stability as the Motion Apps always provide exactly the same parameters. (festo.com)
- The main action is to take the EPI (motion base) volume and (inverse) warp it according to the motion parameters. (nih.gov)
- In theory, the result could be run through 3dvolreg to generate a similar set of motion parameters. (nih.gov)
- Grab the first N (e.g. 6) principle components, and use them along with other motion parameters. (nih.gov)
- First make the time series orthogonal to the motion parameters, and only then take the first N principle components. (nih.gov)
- 3dDeconvolve to remove the original motion parameters, and use the resulting errts dataset as input to 3dpc. (nih.gov)
- The motion model parameters of these planar surfaces are spect to these surface. (nih.gov)
- 8 called the planar motion model parameters can be expressed sponding to the affine motion model. (nih.gov)
- Repetitive motion disorders (RMDs) are a family of muscular conditions that result from repeated motions performed during the normal work or daily activities. (nih.gov)
- Data from a recent study in rats suggest that 3 weeks of modeled manual therapy (MMT) largely prevented the physiological processes and pain that often accompany a repetitive motion injury. (nih.gov)
- Although scopolamine (hyoscine) has been used in the treatment and prevention of motion sickness for decades, there have been no systematic reviews of its effectiveness. (nih.gov)
- Given sufficient stimulus, all people with functional vestibular systems can develop motion sickness. (cdc.gov)
- People with a history of migraines, vertigo, and vestibular disorders are more prone to motion sickness. (cdc.gov)
- Sensory conflict theory (the most widely accepted explanation for motion sickness) proposes that the condition is caused by conflict between the visual, vestibular, and somatosensory systems, and involves complex neurophysiologic signaling between multiple nuclear regions, neurotransmitters, and receptors. (cdc.gov)
- This initiative seeks to establish the fundamental knowledge base that will lead to the development of clinical test protocols for assessing the vestibular system in vivo during natural motion. (nih.gov)
- This Program Announcement (PA), Vestibular Reflexes During Natural Motion, is related to the priority area of physical activity fitness, unintentional injuries, occupational health and safety and clinical prevention services. (nih.gov)
- To assess the effectiveness of scopolamine versus no therapy, placebo, other drugs, behavioural and complementary therapy or two or more of the above therapies in combination for motion sickness in persons (both adults and children) without known vestibular, visual or central nervous system pathology. (nih.gov)
- Specifically, the goal of this project is to determine how the VOR generates compensatory eye movements to maintain binocular fixation on visual targets during the linear, angular and complex head motion associated with daily living. (nih.gov)
- The key benefit of Motion is ease of use: a completely understandable timeline lets you layer text, objects, and imagery, controlling the sequences in which they appear, animate, and disappear. (ilounge.com)
- For more information on adjusting the timing of layers in the Timeline, see Intro to the Timeline in Motion . (apple.com)
- For example, the 6 parameter affine model - i.e., with - is frequently used for motion segmentation. (nih.gov)
- When specified as a 5-element vector, the state vector describes 2-D motion in the x-y plane. (mathworks.com)
- The disorders are caused by too many uninterrupted repetitions of an activity or motion, unnatural or awkward motions such as twisting the arm or wrist, overexertion, incorrect posture, or muscle fatigue. (nih.gov)
- BOLIVAR, Ohio , Aug. 24, 2021 /PRNewswire/ -- Cable Manufacturing & Assembly ("CMA"), a Torque Capital Group portfolio company, announced today that it has completed the purchase of Cablecraft Motion Controls ("Cablecraft"), a leading designer and manufacturer of high-performance, critical application mechanical motion control products. (prnewswire.com)
- This transaction brings together two iconic brands in mechanical motion controls creating a global leader in the design and manufacture of control cables, linkages, assemblies, actuation systems, and related components. (prnewswire.com)
- Experiments on synthetic and clinical data show the importance of image-derived motion on estimating physiologically plausible mechanical properties and the promising performance of our framework. (nih.gov)
- Simpler engineering, commissioning and operation: the Motion Apps with their numerous functions replace up to 50 individual functional components, thus simplifying the design. (festo.com)
- With also the FDG-PET and contrast-enhanced CT images, the functional, structural, and motion data are combined for a more patient-specific model. (nih.gov)
- This workshop will provide discussion about clinical needs and how sensor technologies can be used to monitor personal motion in older and/or disabled persons' everyday lives and monitor how well or not so well they live independently. (nih.gov)
- Over a 14-day period, adolescents used a novel mobile phone and motion sensor technology to collect more accurate, real-time data about nighttime activities and sleep environments, helping pinpoint specific factors and activities influencing sleep patterns. (nih.gov)
- Additionally, virtually all students rated Motion Math as fun and that the game helped them learn. (wired.com)
- We use the multi-echo ICA denoising method implemented in tedana and additionally removed ICA components that are correlated with head motion, cardiac, and respiratory fluctuations. (nih.gov)
- The motion handler is called whenever the cursor moves within the window and isn't clipped by a sibling window. (gnome.org)
- Without global motion events, window widgets that didn't select crossing events would make it impossible for the GtkNotebook to track the cursor. (gnome.org)
- Development of this system was challenging and necessitated a series of key decisions around selection of equipment, identification and query of nighttime motion and noise "events" of interest to investigators, and construction of necessary survey instruments. (nih.gov)
- Pitched as a tool to let you "customize Final Cut Pro titles, transitions, and effects"-and certainly valuable for use with Apple's video editing apps-Motion can create standalone 4K, 2K, and web-ready animations using text, shapes, photos, music, and videos. (ilounge.com)
- Create a measurement from an object undergoing constant turn-rate motion. (mathworks.com)
- Now bioengineers have developed implantable and wearable nanogenerators from special materials that create electrical pulses when compressed by body motions. (nih.gov)
- Professor Michelle Riconscente, an expert in educational assessment at the University of Southern California, conducted an experimental study to determine whether Motion Math, a fractions game designed for the iPad, iPhone, and iPod, improves students' fractions knowledge and attitudes. (wired.com)
- Medications used to prevent and treat motion sickness are thought to work by suppressing the signals that contribute to neural mismatch. (cdc.gov)
- Limited range of motion is a term meaning that a joint or body part cannot move through its normal range of motion. (medlineplus.gov)
- Based in New Haven, IN , Cablecraft has a rich history of providing proprietary, highly engineered motion control products to market leaders in the heavy truck, engine controls, construction and agriculture industries. (prnewswire.com)
- Overall, you can achieve optimum modelling of motions with a highly customised combination of pressure and flow rate and also vary the speed of travel within a working stroke - for example when switching from speed to maximum force in a pressing operation. (festo.com)
- The intelligence of the Motion Apps provides numerous options, for example for controlling and analysing related processes - including in networks. (festo.com)
- By illustration, when subjects fixate on a target while walking, their VORs must produce compensatory eye movements to stabilize gaze in the face of linear and rotational (pitch) head motion in the vertical plane. (nih.gov)
- Results show that fifth graders' fractions test scores improved an average of over 15% after playing Motion Math for 20 minutes daily over a five-day period, a significant increase compared to a control group. (wired.com)
- It is a rapid and robust reflex system that usually operates synergistically with the slower visual following reflexes to maintain a stable image on the retina over the broad range of trajectories, velocities and frequencies of head motion performed during daily living. (nih.gov)
- Define the state of an object in 2-D constant turn-rate motion. (mathworks.com)
- State vector for a constant turn-rate motion model in two or three spatial dimensions, specified as a real-valued vector or matrix. (mathworks.com)
- Responding to the motion, the state said nothing the defense argued warranted a change in venue or a selection of a jury from outside the area. (courttv.com)
- Some of these undiagnosed patients would likely be identified by testing the system under its operational state of free motion. (nih.gov)
- Hazards In Motion teaches mobile equipment safety for underground miners. (cdc.gov)
- Of course, there will be people who ask questions about the independence of research that has been invested in by an interested company, but nevertheless, we have to start somewhere and hats off to Motion Math Games for taking the initiative and being part of that beginning. (wired.com)
- Cablecraft's complementary product portfolio and breadth of customer application knowledge, along with its recognized brand and reputation, make it an ideal fit with our focus to further grow and diversify CMA's ability to provide a broad portfolio of mission-critical motion control solutions to a variety of end markets. (prnewswire.com)
- Use the "Leakage diagnostics" Motion App to check your application regularly and identify potential leaks at an early stage. (festo.com)
- In consequence, both tumor growth and pancreatic motion contribute to the tumor shape difference observable from images. (nih.gov)
- Identities in motion' engages with recent trends in Modern Languages research, aiming to be a forum in which to discuss different methodologies and representational practices. (warwick.ac.uk)
- With After Effects, you can make eye-catching motion graphics and visual effects - for social posts and videos that won't be ignored. (adobe.com)
- Travelers can use nonpharmacologic interventions to prevent or treat motion sickness (see Box 8-07 ). (cdc.gov)