Sensory thresholds. Medical search. Frequent questions

Weber was able to define absolute and difference threshold statistically, which led to the establishment of Weber's Law and the concept of just noticeable difference to describe threshold perception of stimuli. (wikipedia.org)
There are three common methods used to determine sensory thresholds: Method of Limits: In the first step, the subject is stimulated by strong, easily detectable stimuli that are decreased stepwise (descending sequence) until they cannot detect the stimulus. (wikipedia.org)
Intensities involve stimuli which are surely subthreshold and stimuli which are surely supra-threshold. (wikipedia.org)
You may also have a sensory arousal, whether it's due to GER symptoms, auditory stimuli, bumping your toe, or whatever disruptive event. (medscape.com)
We conclude that mechanosensitivity of high-threshold serosal colonic splanchnic afferents to graded stimuli is unaffected during DSS colitis. (nih.gov)
How neural circuits enable behavioural adaptation by selectively and durably representing subsets of sensory stimuli that are pertinent to a specific outcome is not known. (nature.com)
Two-photon calcium imaging of CA3 axonal projections to CA1 combined with simultaneous local field potential recordings revealed that CA3 projections that encode behaviourally informative sensory stimuli were selectively recruited during the memory replay events that underlie hippocampal memory consolidation 5 . (nature.com)
Satellite glial cells (SGCs) are among the most abundant non-neuronal cells in dorsal root ganglia (DRGs) and closely envelop sensory neurons that detect painful stimuli. (iasp-pain.org)
We tested the hypothesis that cryolipolysis can attenuate nociception of a range of sensory stimuli, including stimuli that evoke itch. (harvard.edu)

Recordings were made from serosal/mesenteric afferents responding only at high thresholds to graded mechanical stimulation with von Frey probes. (nih.gov)
We propose that, during salient sensory stimulation, L-ITCcs disinhibit local and distant principal neurons, acting as "hub cells," to orchestrate the activity of a distributed network. (jneurosci.org)
Effects of subthalamic deep brain stimulation with duloxetine on mechanical and thermal thresholds in 6OHDA lesioned rats. (umassmed.edu)
Effect of low-frequency deep brain stimulation on sensory thresholds in Parkinson's disease. (umassmed.edu)
The Effect of High-Frequency Stimulation on Sensory Thresholds in Chronic Pain Patients. (umassmed.edu)
CRPS is felt to occur as the result of stimulation of sensory nerve fibers. (eorthopod.com)
The result is inflammation or swelling leading to more stimulation of the sensory nerve fibers. (eorthopod.com)
SENSORY STIMULATION: Inspired by the ancient Chinese technique of acupressure, aims to stimulate the release of natural endorphins to relax the nervous system. (backcountry.com)

The study found that warm thermal thresholds at the glans produced the best results. (rxisk.org)
Thermal thresholds are assessed by placing a probe onto the body part being investigated. (rxisk.org)
These peripheral cold receptors, both Aδ- and C-fibers, have thermal thresholds (i.e., the temperature at which nerve impulses are generated) for cold activation between 30-20°C, temperatures considered to be innocuously cool [ 4 , 6 ]. (nih.gov)
Mechanical and thermal pain thresholds were measured on treated and contralateral untreated (control) flanks. (harvard.edu)

No association was observed between VDT and quantitative sensory testing. (clinicalpainadvisor.com)
We discussed several tests that can be used to investigate this condition including skin biopsy, corneal confocal microscopy and quantitative sensory testing. (rxisk.org)
Quantitative sensory testing is the collective term for a group of tests that are used to assess skin sensation. (rxisk.org)
The interesting point about quantitative sensory testing is that in addition to investigating conditions like small fibre neuropathy, it is sometimes also used in urology if a patient is experiencing genital numbness, or if they have erectile dysfunction that is suspected to involve a neuropathy. (rxisk.org)
The effects of cryolipolysis on sensory phenomena were evaluated by quantitative sensory testing (QST) in 11 healthy subjects over a period of 56 days. (harvard.edu)
Quantitative sensory tests were performed and the Neuropathic Pain Scale was assessed at 3 and 6 months. (medscape.com)

Our sensory systems are able to detect subtle changes in ambient temperature, due to the coordinated efforts of thermosensory neurons. (nih.gov)
Thus, there is significant diversity in the types of neurons that respond to cold, as well as an expansive range of cold activation thresholds. (nih.gov)
However, in the mid- to late 1990s, a number of laboratories interested in cold transduction began to use primary cultures of either dorsal root (DRG) or trigeminal (TG) ganglia neurons as in vitro models of sensory afferents. (nih.gov)
Approximately 10-20 percent of ganglia neurons respond to cold temperatures, with thresholds for activation below 30°C [ 2 , 14-16 ]. (nih.gov)

We develop the concept of thresholds to include perceptual triggers of drought awareness and impact within and between various sectors in the catchment (agriculture, business, health and wellbeing, public/communities, and natural and built environments). (frontiersin.org)
Our findings indicate that drought risk presents many complexities within the catchment, given its cross-sectoral nature, rich sources of available water, variable prior drought experience among stakeholders, and different quantitative and perceptual impact thresholds across and within sectors. (frontiersin.org)
A study by Macklin et al suggested that electrical perceptual threshold (EPT) tests are more sensitive than ISNCSCI exams for determining the level of SCI at which sensory function still exists in patients with chronic incomplete cervical SCI. (medscape.com)

High-count microelectrode arrays implanted in peripheral nerves could restore motor function after spinal cord injury or sensory function after limb loss. (researchgate.net)
A sneeze is initiated when sensory nerves in our nose are stimulated by an irritant such as allergens, viruses, bacteria or even fluid. (yahoo.com)
The sensory nerves then carry this irritant information to the brain. (yahoo.com)
The trigeminal nerves are the largest of our 12 pairs of cranial nerves and the largest sensory nerves in the body. (yahoo.com)
The left and right trigeminal nerves carry sensory information from the face to the brain. (yahoo.com)
Sensory nerves travel to the brain via the spinal cord. (yahoo.com)
The sensory nerves that carry pain and irritant signals are narrow, whereas those that carry touch information are wider and faster. (yahoo.com)
In the early to mid-twentieth century, a number of laboratories began to observe cold-induced electrical impulses when recording from mammalian sensory nerves. (nih.gov)
Most of the nerves are motor, but some are sensory. (eorthopod.com)

Researchers conducted a study to determine whether there is an association between vibration detection thresholds and sensory responses in patients with type 1 and type 2 diabetes. (clinicalpainadvisor.com)
Patients with type 1 diabetes (T1D) may be more hypoalgesic to bone pressure pain detection thresholds (pPDT) and pressure pain tolerance thresholds (pPTT), regardless of lower vibration detection thresholds (VDT), according to results of a study recently published in Frontiers in Pain Research . (clinicalpainadvisor.com)
This study concerns the third of a series of three examinations of hand strength and vibration thresholds in a two year period after acute OP poisoning among 48 Nicaraguan men. (bmj.com)
Also, index finger and toe vibration thresholds were slightly increased at the end of the two year period, among men with OP poisonings in all categories, but patterns of onset and evolvement of impairment of vibration sensitivity were less clear than with grip and pinch strength. (bmj.com)
The results obtained from each of the above paradigms were consistent in showing that the presence of vibration did not have a statistically significant effect on hearing thresholds. (cdc.gov)

Mechanosensory responses had thresholds of 1-2g, and maximal responses were observed at 12 g. (nih.gov)
Internal tobacco industry documents show that product appeal and inhalation intensity are mainly determined by the harshness-smoothness balance, non-irritant sensory responses such as taste and satisfaction, and resistance to draw (RTD). (bmj.com)

Within each trigeminal nerve are thousands of individual nerve branches that each carry a specific type of sensory information . (yahoo.com)
The special surface of the Sensory Ball increases sensations and aims to stimulate nerve endings for enhanced relaxation. (backcountry.com)

The threshold detection was mildly impaired in head-down tilt compared with upright position in the combined subjects (6.05 (95% CI 4.58 to 7.51) vs 6.85 (95% CI 5.43 to 8.27), p=0.004). (nih.gov)
the processing of the data to estimate the value of a threshold and its error bounds, and other statistics related to the detection of the stimulus. (iso.org)

We demonstrated that IIH patients have marked impairment in olfactory threshold levels, out of proportion to smell identification impairment. (nih.gov)
There was also impairment in olfactory threshold in head-down tilt compared with upright positioning, but not for smell identification. (nih.gov)
To evaluate the association of acute organophosphate (OP) poisoning with chronic sensory and motor neurological impairment. (bmj.com)
This study will examine the impact of upper airway sensory impairment from chronic rhinosinusitis as a potential mechanism for development of OSA in WTC responders. (cdc.gov)

Defining and measuring sensory thresholds requires setting the sensitivity limit such that the perception observations lead to the absolute threshold. (wikipedia.org)

Methods have been developed to measure thresholds in any of the senses. (wikipedia.org)
As our human diversity allows-us-to experience the world uniquely through every set of senses & perception systems, we all exist under varying degrees qualitatively when it comes-to-noir threshold-levels . (dane101.com)

Vibrotactile threshold abnormalities occurred much more often in the lower extremities. (cdc.gov)

Historically triggers in drought risk management have been demarcated solely in specialist hydrological science terms using indices and critical thresholds. (frontiersin.org)
1986. Documentation of the threshold limit values and biological exposure indices. (cdc.gov)
1994. TLV-Threshold limit values and biological exposure indices for 1994-1995. (cdc.gov)

The underlying mechanisms for olfactory threshold dysfunction in IIH patients need further exploration. (nih.gov)
We aimed to assess the frequency of temporal discrimination threshold (TDT) abnormities in sporadic adult-onset primary torsion dystonia (AOPTD) patients and their first degree relatives. (bmj.com)
LISBON, Portugal - Six months of treatment with growth hormone has improved sensory function in patients with spinal-cord injury and concomitant growth-hormone deficiency, according to the first such trial of this approach. (medscape.com)

For example, experience has shown that chemicals with a low odor threshold often require low OELs even though many are not toxic or do not cause irritation at those air concentrations. (cdc.gov)

Olfaction was tested for all subjects in upright and 6° head-down tilt positions using two different measures: University of Pennsylvania Smell Identification Test and Olfactory Threshold Sniffin' Sticks with phenylethyl alcohol. (nih.gov)
The olfactory threshold dilution levels were 9.07 (95% CI 1.85 to 5.81) and 3.83 (95% CI 7.04 to 11.10), p=0.001, and smell identification scores were 35.61 (95% CI 34.03 to 37.18) and 32.47 (95% CI 30.85 to 34.09), p=0.008, for control and IIH subjects, respectively. (nih.gov)

Changes in sensory quantification (electrical perception threshold) of up to five levels below the site of spinal injury were observed," reported Gulliem Cuatrecasas, MD, PhD, an endocrinologist from Hospital Quiron-Teknon, Barcelona, Spain, who presented the work here at the European Congress of Endocrinology (ECE) 2017 . (medscape.com)

The investigators reported that the spinal segment at which sensory function was found to be maintained was lower in EPT testing than in ISNCSCI evaluation in 15 of 17 individuals with this sort of SCI. (medscape.com)
The NLOI is defined as the most caudal (ie, lowest) level of the spinal cord that has normal motor and sensory function. (medscape.com)

The study will also examine the contribution of other pathophysiologic mechanisms (impaired upper airway muscle responsiveness, low arousal threshold and loop gain) in the development of OSA that may be used to target therapeutic interventions in the future in this population. (cdc.gov)

This includes touch, pain and irritation sensory information from the facial skin and from inside the nose and mouth. (yahoo.com)
Pain Threshold" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (umassmed.edu)
This graph shows the total number of publications written about "Pain Threshold" by people in this website by year, and whether "Pain Threshold" was a major or minor topic of these publications. (umassmed.edu)
Below are the most recent publications written about "Pain Threshold" by people in Profiles. (umassmed.edu)
This means that distractions quickly become disruptive and intense sensory experiences may even cause pain. (dane101.com)
This lowers the pain threshold. (eorthopod.com)
Use your body weight to apply varied levels of muscle compression and suit your personal pain threshold. (backcountry.com)

1978. Documentation of threshold limit values for substances in workroom air, 3rd ed. (cdc.gov)
Of centrations is difficult for odors and sensory irritants the 600 substances for which an OEL has already because some chemicals have odors that warn of been established, 66% are sensory irritants (Kurtz, their presence before irritation is produced. (cdc.gov)

Sensory abnormalities in unaffected relatives may indicate nonmanifesting gene carriage. (bmj.com)

These impulses were then reduced in intensity until the subject could no longer feel them, thereby providing a measurement of genital sensory threshold. (rxisk.org)

By contrast, axons encoding uninformative, peripatetic sensory cues were notably suppressed during memory replay. (nature.com)
The chapters are detailed how-to discussions on determining contrast threshold, and hence when a roadway object would be visible. (lawyersandjudges.com)
Chapter 4 reviews the physical calculations needed to determine contrast, while Chapter 5 outlines the methods for calculating contrast threshold. (lawyersandjudges.com)

Fig. 4: Replay of sensory cue-driven cognitive maps in CA3SCs. (nature.com)

In-depth conversations between a person with autism and an occupational therapist provide insight into understanding differences and difficulties in sensory processing and regulation, praxis, and communication. (researchgate.net)
This article illustrates the benefits of an intensive therapeutic program designed to address sensory and motor differences underlying communication, as well as the vital role the occupational therapist plays in addressing these underlying differences to improve functional communication and social participation. (researchgate.net)
Methods Truth Tobacco Industry Documents was reviewed for studies showing noticeable sensory differences resulting from variations in tobacco blend and design characteristics. (bmj.com)
Conclusions While some clusters of brand varieties provided a noticeably different product for consumers, in many cases design differences within these clusters did not exceed the expected discrimination threshold. (bmj.com)
The sensory test was specially designed to detect subclinical intraindividual differences, said Dr Cuatrecasas. (medscape.com)

Recognition threshold: the level at which a stimulus can not only be detected but also recognized. (wikipedia.org)
The guidelines do not measure a recognition threshold as defined in ISO 5492. (iso.org)

Sensory cell populations were evaluated with the surface preparation technique. (cdc.gov)
In addition, the CGRP neuron populations also translate threatening sensory input and communicate it with other brain networks. (medicalnewstoday.com)

fundamentally, the procedures measure a difference threshold because a test sample is compared with a reference sample. (iso.org)

According to a press release , co-first author Sukjae Joshua Kang said, "drugs that block CGRP have been used to treat migraine, so I'm hoping that our study can be an anchor to use this kind of drug in relieving threat memories in PTSD, or sensory hypersensitivity in autism, too. (medicalnewstoday.com)

Variations in tobacco type, additives and physical design characteristics, most notably filter ventilation, determine smoke sensory perception. (bmj.com)

The level of sensitivity is usually assumed to be constant in determining the threshold limit. (wikipedia.org)
While some people tend normally toward sensory processing sensitivity (SPS), others fall below those thresholds. (dane101.com)

Ability to explain the benefits and limitations (scientific and ethical) of the sensory evaluation of food and be able to recommend, justify and critique commonly used methods of sensory analysis. (edu.au)
Fortunately, there are other methods of investigating sensory issues. (rxisk.org)
They do not address the standardization of methods of determining air quality as discussed in EN 13725. (iso.org)
This process involved developing a framework for science-narrative drought "threshold thinking" that utilizes consideration of severity and scale, spatial and temporal aspects, framing in terms of enhancing or reducing factors internal and external to the catchment and new graphical methods. (frontiersin.org)

To form coherent motion percepts, the visual system must first detect and sense these changes at different spatial and temporal frequencies, and then combine the sensory information appropriately. (jneurosci.org)

These axonal projections formed sequential assemblies that conjunctively link sensory features to spatial location and thus reward proximity. (nature.com)

Sensory threshold describes how much sensory information a child needs before he reacts. (zerotothree.org)
Rather than examining the building from an architectural perspective, each episode describes one sensory aspect of the space-sound, touch, light-creating a rich aural and physical experience: a new and quietly revolutionary way to explore the Guggenheim. (apple.com)

1 2 Therefore, the tobacco industry devotes considerable resources to sensory evaluation of their products. (bmj.com)

Key elements of the examination include motor and sensory testing, which allows for the designation of a neurologic level of injury (NLOI) and of the completeness of injury. (medscape.com)
In addition, rectal examination is required to assess motor and sensory functions. (medscape.com)

His experiments were intended to determine the absolute and difference, or differential, thresholds. (wikipedia.org)

In psychophysics, sensory threshold is the weakest stimulus that an organism can sense. (wikipedia.org)
Absolute threshold: the lowest level at which a stimulus can be detected. (wikipedia.org)
Differential threshold: the level at which an increase in a detected stimulus can be perceived. (wikipedia.org)
Terminal threshold: the level beyond which any increase to a stimulus no longer changes the perceived intensity. (wikipedia.org)
The strength of the stimulus, perceived in more than half of the presentations, will be taken as the threshold. (wikipedia.org)
In both modes, the way in which probability of a correct response changes with intensity of stimulus, i.e. the slope of the dose/response curve, could be an important aspect of the study as well as the threshold value, and the data processing procedures described here provide this information. (iso.org)

In seminal studies conducted by Hensel and Zotterman in the 1950s, menthol elicited its "cool" sensation by increasing the threshold temperature for activation of cold receptors [ 13 ]. (nih.gov)

As the measurements come closer to the absolute threshold, the variability of the noise increases, causing the threshold to be obscured. (wikipedia.org)

Fig. 1: Rapid reorganization of CA3SC activity during sensory experience. (nature.com)

The paper discusses how this extended sense of thresholds might contribute to research and practice, involving different ways of linking drought severity and perception. (frontiersin.org)

Visual psychophysics" is the psychological science that underlies visibility and all other sensory judgments. (lawyersandjudges.com)

At mealtime, offer a mix of foods that include some of your child's sensory likes and dislikes so that she can explore and try different foods. (zerotothree.org)

Diseases3

Analytical, Diagnostic and Therapeutic Techniques and Equipment2

Psychiatry and Psychology8

Phenomena and Processes8

Health Care1

Stimuli9

Stimulation8

Thermal4

Quantitative sensory6

Neurons4

Perceptual3

Nerves9

Vibration5

Responses2

Nerve2

Detection2

Impairment4

Defining1

Senses2

Vibrotactile1

Indices3

Patients3

Odor1

Olfactory2

Perception threshold1

Spinal2

Mechanisms1

Pain7

Substances2

Abnormalities1

Measurement1

Contrast3

Cognitive1

Differences5

Recognition2

Populations2

Difference threshold1

Autism1

Notably1

Sensitivity2

Methods4

Detect1

Spatial1

Describes2

Evaluation1

Motor2

Experiments1

Stimulus6

Temperature1

Increases1

Rapid1

Practice1

Psychological1

Include1