The sensory areas on the vertical wall of the saccule and in the floor of the utricle. The hair cells in the maculae are innervated by fibers of the VESTIBULAR NERVE.
An oval area in the retina, 3 to 5 mm in diameter, usually located temporal to the posterior pole of the eye and slightly below the level of the optic disk. It is characterized by the presence of a yellow pigment diffusely permeating the inner layers, contains the fovea centralis in its center, and provides the best phototropic visual acuity. It is devoid of retinal blood vessels, except in its periphery, and receives nourishment from the choriocapillaris of the choroid. (From Cline et al., Dictionary of Visual Science, 4th ed)

Age-related blood flow and capillary changes in the rat utricular macula: a quantitative stereological and microsphere study. (1/15)

Vascular change may contribute to age-related vestibular dysfunction. Previously, we reported a significant age-related decrease in blood flow (BF) and mean capillary diameter (D(cap)) in the rat posterior canal crista. The purpose of this study was to examine an otolith organ, the utricle, for similar changes. Old male Fischer 344 rats (O; 28-31 mos) were anesthetized, and the left cardiac ventricle was transcutaneously injected with radioactive microspheres to determine BF. The temporal bones were removed, fixed, and decalcified. The utricles were dissected free and placed into a gamma counter with the reference samples. The specimens were then plastic embedded and serially sectioned at 1 microm according to the vertical section technique. Microsphere surface counts were made and neuroepithelial BF calculated. A systematic random set of sections was sampled and analyzed using stereological techniques for estimates of D(cap), capillary surface area/unit volume (S(v,cap)), capillary length/ unit volume (L(v,cap)), and volume of utricular neuroepithelium (V(ut)). Using these data, total capillary surface (S(cap)) and total length (L(cap)) were calculated. Statistical comparisons were made with data from our previous study of young animals (Y; 3-6 mos). Results indicate a significant age-related decrease in BF (Y = 0.125 microL/min, O = 0.062 microL/min; P = 0.003), D(cap) (Y = 5.95 micro, O = 4.57 microm; P = 0.0002), S(vcap) (Y = 12.33 mm2/mm3, = 9.87 mm2/mm3, P = 0.016), S(cap) (Y = 0.178 mm2, O = 0.129 mm2; p = 0.01), and V(ut) (Y = 0.014 mm3, O = 0.013 mm3; P = 0.04) with no significant change in L(v,cap) (Y = 655 mm/mm3, O = 686 mm/mm3, P = 0.41) or L(cap) (Y = 9.47 mm, O = 8.96 mm; P = 0.49). These age-related vascular changes are likely to have a significant impact on utricular physiological and thus, dysequilibrium.  (+info)

Afferent innervation patterns of the saccule in pigeons. (2/15)

The innervation patterns of vestibular saccular afferents were quantitatively investigated in pigeons using biotinylated dextran amine as a neural tracer and three-dimensional computer reconstruction. Type I hair cells were found throughout a large portion of the macula, with the highest density observed in the striola. Type II hair cells were located throughout the macula, with the highest density in the extrastriola. Three classes of afferent innervation patterns were observed, including calyx, dimorph, and bouton units, with 137 afferents being anatomically reconstructed and used for quantitative comparisons. Calyx afferents were located primarily in the striola, innervated a number of type I hair cells, and had small innervation areas. Most calyx afferent terminal fields were oriented parallel to the anterior-posterior axis and the morphological polarization reversal line. Dimorph afferents were located throughout the macula, contained fewer type I hair cells in a calyceal terminal than calyx afferents and had medium sized innervation areas. Bouton afferents were restricted to the extrastriola, with multi-branching fibers and large innervation areas. Most of the dimorph and bouton afferents had innervation fields that were oriented dorso-ventrally but were parallel to the neighboring reversal line. The organizational morphology of the saccule was found to be distinctly different from that of the avian utricle or lagena otolith organs and appears to represent a receptor organ undergoing evolutionary adaptation toward sensing linear motion in terrestrial and aerial species.  (+info)

Hair bundle heights in the utricle: differences between macular locations and hair cell types. (3/15)

Hair bundle structure is a major determinant of bundle mechanics and thus of a hair cell's ability to encode sound and head movement stimuli. Little quantitative information about bundle structure is available for vestibular organs. Here we characterize hair bundle heights in the utricle of a turtle, Trachemys scripta. We visualized bundles from the side using confocal images of utricular slices. We measured kinocilia and stereocilia heights and array length (distance from tall to short end of bundle), and we calculated a KS ratio (kinocilium height/height of the tallest stereocilia) and bundle slope (height fall-off from tall to short end of bundle). To ensure that our measurements reflect in vivo dimensions as closely as possible, we used fixed but undehydrated utricular slices, and we measured heights in three dimensions by tracing kinocilia and stereocilia through adjacent confocal sections. Bundle heights vary significantly with position on the utricular macula and with hair cell type. Type II hair cells are found throughout the macula. We identified four subgroups that differ in bundle structure: zone 1 (lateral extrastriola), striolar zone 2, striolar zone 3, and zone 4 (medial extrastriola). Type I hair cells are confined to striolar zone 3. They have taller stereocilia, longer arrays, lower KS ratios, and steeper slopes than do neighboring (zone 3) type II bundles. Models and experiments suggest that these location- and type-specific differences in bundle heights will yield parallel variations in bundle mechanics. Our data also raise the possibility that differences in bundle structure and mechanics will help explain location- and type-specific differences in the physiological profiles of utricular afferents, which have been reported in frogs and mammals.  (+info)

Regeneration of vestibular otolith afferents after ototoxic damage. (4/15)

Regeneration of receptor cells and subsequent functional recovery after damage in the auditory and vestibular systems of many vertebrates is well known. Spontaneous regeneration of mammalian hair cells does not occur. However, recent approaches provide hope for similar restoration of hearing and balance in humans after loss. Newly regenerated hair cells receive afferent terminal contacts, yet nothing is known about how reinnervation progresses or whether regenerated afferents finally develop normal termination fields. We hypothesized that neural regeneration in the vestibular otolith system would recapitulate the topographic phenotype of afferent innervation so characteristic of normal development. We used an ototoxic agent to produce complete vestibular receptor cell loss and epithelial denervation, and then quantitatively examined afferent regeneration at discrete periods up to 1 year in otolith maculas. Here, we report that bouton, dimorph, and calyx afferents all regenerate slowly at different time epochs, through a progressive temporal sequence. Furthermore, our data suggest that both the hair cells and their innervating afferents transdifferentiate from an early form into more advanced forms during regeneration. Finally, we show that regeneration remarkably recapitulates the topographic organization of afferent macular innervation, comparable with that developed through normative morphogenesis. However, we also show that regenerated terminal morphologies were significantly less complex than normal fibers. Whether these structural fiber changes lead to alterations in afferent responsiveness is unknown. If true, adaptive plasticity in the central neural processing of motion information would be necessitated, because it is known that many vestibular-related behaviors fully recover during regeneration.  (+info)

Zebrafish pax5 regulates development of the utricular macula and vestibular function. (5/15)

The zebrafish otic vesicle initially forms with only two sensory epithelia, the utricular and saccular maculae, which primarily mediate vestibular and auditory function, respectively. Here, we test the role of pax5, which is preferentially expressed in the utricular macula. Morpholino knockdown of pax5 disrupts vestibular function but not hearing. Neurons of the statoacoustic ganglion (SAG) develop normally. Utricular hair cells appear to form normally but a variable number subsequently undergo apoptosis and are extruded from the otic vesicle. Dendrites of the SAG persist in the utricle but become disorganized after hair cell loss. Hair cells in the saccule develop and survive normally. Otic expression of pax5 requires pax2a and fgf3, mutations in which cause vestibular defects, albeit by distinct mechanisms. Thus, pax5 works in conjunction with fgf3 and pax2a to establish and/or maintain the utricular macula and is essential for vestibular function.  (+info)

Architecture of the mouse utricle: macular organization and hair bundle heights. (6/15)

Hair bundles are critical to mechanotransduction by vestibular hair cells, but quantitative data are lacking on vestibular bundles in mice or other mammals. Here we quantify bundle heights and their variation with macular locus and hair cell type in adult mouse utricular macula. We also determined that macular organization differs from previous reports. The utricle has approximately 3,600 hair cells, half on each side of the line of polarity reversal (LPR). A band of low hair cell density corresponds to a band of calretinin-positive calyces, i.e., the striola. The relation between the LPR and the striola differs from previous reports in two ways. First, the LPR lies lateral to the striola instead of bisecting it. Second, the LPR follows the striolar trajectory anteriorly, but posteriorly it veers from the edge of the striola to reach the posterior margin of the macula. Consequently, more utricular bundles are oriented mediolaterally than previously supposed. Three hair cell classes are distinguished in calretinin-stained material: type II hair cells, type ID hair cells contacting calretinin-negative (dimorphic) afferents, and type IC hair cells contacting calretinin-positive (calyceal) afferents. They differ significantly on most bundle measures. Type II bundles have short stereocilia. Type IC bundles have kinocilia and stereocilia of similar heights, i.e., KS ratios (ratio of kinocilium to stereocilia heights) approximately 1, unlike other receptor classes. In contrast to these class-specific differences, bundles show little regional variation except that KS ratios are lowest in the striola. These low KS ratios suggest that bundle stiffness is greater in the striola than in the extrastriola.  (+info)

Resting discharge patterns of macular primary afferents in otoconia-deficient mice. (7/15)

 (+info)

Immunohistochemical localization and mRNA expression of aquaporins in the macula utriculi of patients with Meniere's disease and acoustic neuroma. (8/15)

 (+info)

The acoustic maculae, also known as the vestibularocochlear nerve or cranial nerve VIII, are a part of the human body's auditory and vestibular system. The acoustic maculae consist of two main structures: the cochlea and the vestibule.

The cochlea is responsible for hearing and converts sound waves into electrical signals that can be interpreted by the brain. It contains the organ of Corti, which has hair cells that are stimulated by sound vibrations and convert them into nerve impulses.

The vestibule, on the other hand, is responsible for maintaining balance and spatial orientation. It contains two sac-like structures called the utricle and saccule, which contain sensory hair cells that respond to gravity and linear acceleration.

Damage to the acoustic maculae can result in hearing loss, tinnitus (ringing in the ears), or balance disorders.

The macula lutea, often simply referred to as the macula or fovea centralis, is a part of the eye that is responsible for central vision and color perception. It's located in the center of the retina, the light-sensitive tissue at the back of the eye. The macula contains a high concentration of pigments called xanthophylls, which give it a yellowish color and protect the photoreceptor cells in this area from damage by blue light.

The central part of the macula is called the fovea, which is a small depression that contains only cones, the photoreceptor cells responsible for color vision and high visual acuity. The fovea is surrounded by the parafovea and the perifovea, which contain both cones and rods, the photoreceptor cells responsible for low-light vision and peripheral vision.

Damage to the macula can result in a loss of central vision and color perception, a condition known as age-related macular degeneration (AMD), which is a leading cause of blindness in older adults. Other conditions that can affect the macula include macular edema, macular holes, and macular pucker.

... or saccular macula), to which are distributed the saccular filaments of the acoustic nerve. The vestibule is a region of the ... The macula of saccule lies in a nearly vertical position. It is a 2mm by 3mm patch of hair cells. Each hair cell of the macula ... The macula of the utricle is in a horizontal position and detects horizontal acceleration. The coordinated sensory perception ... Its anterior part exhibits an oval thickening, the macula of saccule ( ...
... localization and mRNA expression of aquaporins in the macula utriculi of patients with Meniere's disease and acoustic neuroma ...
The macula of utricle (macula acustica utriculi) is a small (2 by 3 mm) thickening lying horizontally on the floor of the ... it receives the utricular filaments of the acoustic nerve. The hair cells are mechanoreceptors which have 40 to 70 stereocilia ... The macula is also sensitive to linear acceleration as the inertia possessed by the statoconia can also shift the gelatinous ... When you stop at the next light, the macula stops but the otolithic membrane keeps going for a moment, bending the stereocilia ...
... acoustic maculae MeSH A09.246.631.909.625.125.340 - hair cells, vestibular MeSH A09.246.631.909.625.125.680 - otolithic ... macula lutea MeSH A09.371.729.522.436 - fovea centralis MeSH A09.371.729.690 - optic disk MeSH A09.371.729.727 - photoreceptors ...
... macula cribrosa media) for the passage of filaments of the acoustic nerve to the saccule; and behind this depression is an ... The pyramid and adjoining part of the recessus ellipticus are perforated by a number of holes (macula cribrosa superior). The ... which is perforated by a number of holes for the passage of filaments of the acoustic nerve which supply the vestibular end of ...
The other two sensory organs supplied by the vestibular neurons are the maculae of the saccule and utricle. Hair cells of the ... Some older texts call the nerve the acoustic or auditory nerve, but these terms have fallen out of widespread use because they ... The Acoustic Nerve. Gray, Henry. 1918. Anatomy of the Human Body". www.bartleby.com. Vestibulocochlear nerve Superficial ... It emerges from the pontomedullary junction and exits the inner skull via the internal acoustic meatus in the temporal bone. ...
"Macula (Far from Mother Land)" (Takasaki) - 4:46 "Ebony Eyes" (Takasaki, Milky Way) - 5:31 Side two "Wild Boogie Run" (Sasaji ... electric and acoustic guitars, lead vocals on track 4, backing vocals, producer Masanori Sasaji - keyboards and synthesizers, ...
Choroid Ciliary body Ciliary processes Ciliary muscle Iris Pupil Inner layer of eyeball Retina Ora serrata Optic disc Macula ... Tragicus Pyramidal muscle of auricle Antitragicus Transverse muscle of auricle Oblique muscle of auricle External acoustic ... tube Inner ear Bony labyrinth Semicircular canals Cochlea Modiolus Scala vestibuli Helicotrema Scala tympani Internal acoustic ...
The macula sacculi detects vertical acceleration while the macula utriculi is responsible for horizontal acceleration. These ... acoustic hair cells, auditory cells or cells of Corti. The organ of Corti is lined with a single row of inner hair cells and ... They contain the sensory hair cells and otoliths of the macula of utricle and of the saccule, respectively, which respond to ... bony fish contain a sensory cluster called the macula neglecta in the utricle that may have this function. Although fish have ...
He created the cover for the album Acústico [Acoustic] by the Portuguese musician Júlio Pereira (1994), painted a watercolour ... "Anima et Macula", at Cintrik Gallery in Antwerp. Since then, he has taken part in important international exhibitions including ...
... enlargement lumbosacral plexus lumbrical lunate lung lymph lymph nodes lymphatic system lymphatic vessels macroscopic macula ... accessory cuneate nucleus accessory nerve accessory olivary nucleus accommodation reflex acetabulum Achilles tendon acoustic ... interhemispheric fissure intermediate horn cell intermediolateral cell column intermediolateral nucleus internal acoustic ...
The 2 by 3 mm patch of hair cells and supporting cells are called a macula. Each hair cell of a macula has 40 to 70 stereocilia ... Saccular acoustic sensitivity How Our Balance System Works [1] American Speech-Language-Hearing Association, 2013 Fitzakerly, ... The anterior part of the saccule exhibits an oval thickening, the macula acustica sacculi, or macula, to which are distributed ... Within the macula are hair cells, each having a hair bundle on the apical aspect. The hair bundle is composed of a single ...
Linda went on to release her single acoustic album "Jam" (I am) in 2011 which was written and composed by her. She was the ... In 1978 the famous guitarist and composer Nexhat Macula formed one of the best Albanian rock bands of all time, called "TNT" in ...
T. obscure cinereus, subtus pallide cinereus, macula alarum albida Jobling, James A (2010). The Helm Dictionary of Scientific ... that mimicry in the mockingbird resulted from the bird being genetically predisposed to learning vocalizations with acoustic ...
... unspecified 388.3 Tinnitus 388.4 Other abnormal auditory perception 388.5 Disorders of acoustic nerve 388.6 Otorrhoea 388.7 ... proliferative retinopathy 362.3 Retinal vascular occlusion 362.4 Separation of retinal layers 362.5 Degeneration of macula and ...
In some deep sea fishes like the Antimora, the swim bladder maybe also connected to the macula of saccule in order for the ... It simulates high-energy sound waves in aquatic far-field, plane-wave acoustic conditions. Siphonophores have a special swim ... Published by WCB/McGraw-Hill, p. 12 ISBN 0-697-28654-1 Love R. H. (1978). "Resonant acoustic scattering by swimbladder-bearing ... Baik K. (2013). "Comment on "Resonant acoustic scattering by swimbladder-bearing fish" [J. Acoust. Soc. Am. 64, 571-580 (1978 ...
M. A. Kallistratova (1997). "Physical grounds for acoustic remote sensing of the atmospheric boundary layer". Acoustic Remote ... "speculum sine macula" (mirror without blemish), or as attributes of scholarly and theological wisdom and knowledge as they ... An acoustic mirror reflects sound waves. Objects such as walls, ceilings, or natural rock-formations may produce echos, and ... Acoustic mirrors may be used for applications such as parabolic microphones, atmospheric studies, sonar, and seafloor mapping. ...
The cochlear duct of the owl contains the basilar papilla, the tectorial membrane, the tegmentum vasculum, and the macula of ... The lateral shell projects to the external nucleus, where each space-specific neuron responds to acoustic stimuli only if the ... Neural Basis of Behavioral Adaptations, 1-9 Payne, Roger S. (1971). "Acoustic Location of Prey by Barn Owls (Tyto Alba)". ...
... or saccular macula), to which are distributed the saccular filaments of the acoustic nerve. The vestibule is a region of the ... The macula of saccule lies in a nearly vertical position. It is a 2mm by 3mm patch of hair cells. Each hair cell of the macula ... The macula of the utricle is in a horizontal position and detects horizontal acceleration. The coordinated sensory perception ... Its anterior part exhibits an oval thickening, the macula of saccule ( ...
Bashkim Kerqeli & Luan Macula. Rockuzine2018-08-06T08:35:58+01:00 Acoustic Rock Night E Mërkurë , 8 gusht , 21:30 Bashkim ... Ethnically Plugged- Acoustic Rock Night E Premte , 9 Nentor , 21:30 Luan Macula - Kitare Ilir Tolaj - Kitare Edon Ramadani - ... Kerqeli - Vocal & Guitar Luan Macula - Guitar Live në Rockuzine - Hyrja pa pagesë Rezervimet përmes Facebook Nightlife Pristina ...
Retinal burns are most likely to occur in the area of central vision, the macula lutea, having dimensions of approximately 2.0 ... Thermal burn, acoustic damage, or photochemical alteration is possible depending upon the energy absorbed. The biological ... The central region of the macula, termed the fovea centralis, is only about 150 micrometers in diameter and provides detailed ... Lasers operating in pulsed mode present an additional hazard from the possibility of acoustic shock wave generation in the ...
Whitish in colour, and of an oval or nearly rhombic shape, this macula measures 3 mm. in length and 2-3 mm. in its greatest ... BOTTOM OF INTERNAL ACOUSTIC MEATUS DIVIDED INTO UPPER AND LOWER AREAS BY THE CRISTA TRANSVERSA. ... It is convenient, at this stage, to study the fundus of the internal acoustic meatus, which has been referred to as forming the ... This has a breadth of about 15 mm., and to it the saccular fibres of the acoustic nerve are distributed. The superior extremity ...
The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the vestibular nerve. Auditory and ... The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the vestibular nerve. Auditory and ... The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the vestibular nerve. Auditory and ... The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the vestibular nerve. Auditory and ...
Whitish in colour, and of an oval or nearly rhombic shape, this macula measures 3 mm. in length and 2-3 mm. in its greatest ... BOTTOM OF INTERNAL ACOUSTIC MEATUS DIVIDED INTO UPPER AND LOWER AREAS BY THE CRISTA TRANSVERSA. ... It is convenient, at this stage, to study the fundus of the internal acoustic meatus, which has been referred to as forming the ... This has a breadth of about 15 mm., and to it the saccular fibres of the acoustic nerve are distributed. The superior extremity ...
Meaning of acoustic impedance tests. What does acoustic impedance tests mean? Information and translations of acoustic ... Definition of acoustic impedance tests in the Definitions.net dictionary. ... acoustic maculae. *acoustic meatus noun. Alternative searches for acoustic impedance tests:. *. Search for Synonyms for ... What does acoustic impedance tests mean?. Definitions for acoustic impedance tests. acoustic im·ped·ance tests. This dictionary ...
B-scan ultrasound revealed a lesion with underlying acoustic shadowing. What is the most likely diagnosis? What treatment, if ... Examination revealed early cataracts in each eye and deep yellowish lesions underneath the superotemporal arcade of each macula ...
Macula lutea: small, oval, yellow area lateral to optic disc iv. Fovea centralis: central depressed area in macula; area of ... 146 External Ear B. External acoustic meatus 1. Extent: from bottom of concha to tympanic membrane, approximately 2.4 cm 2. ... 157 Inner Ear (Labyrinth) A. Sense organ : A. For equilibrium: macula utriculi, macula sacculi, and cristae ampullaris B. For ... Internal acoustic (auditory) meatus: transmits facial (CN VII) and vestibulocochlear (CN VIII) nerves and labyrinthine artery ...
These potentials, evoked by the acoustic stimulation of the saccular macula and mediated by vestibulocollic reflex pathway, are ...
An acoustic neuroma, also known as a vestibular schwannoma, is a noncancerous tumor that develops on the nerve that connects ... Age-related macular degeneration (AMD) is a condition that affects the macula, which is the part of the eye that provides sharp ... Symptoms of acoustic neuromas can mimic symptoms of other ear problems, making it challenging to diagnose an acoustic neuroma. ... An acoustic neuroma, also known as a vestibular schwannoma, is a noncancerous tumor that develops on the nerve that connects ...
... at the otoliths and the geometry of the otolith lead to different magnitudes of the differential motion between the macula and ... Numerical modeling of the impacts of acoustic stimulus on fish otoliths from two directionsa) Chong Wei 0000-0002-2359-9285 ... Chong Wei, Robert D. McCauley; Numerical modeling of the impacts of acoustic stimulus on fish otoliths from two directions. J. ... study this and gain insight into specific details of the differential motion of the otolith relative to the sensory macula when ...
The acoustic nerve (c.VIII, Fig 5; VIII, Fig 6) shares a short ventrolateral recess with the facial nerve, before entering the ... Morphology of the ear of the shark Carcharinus, with particular reference to the macula neglecta. Pacific Science. 1972;26:264- ... It is narrowest just posterior to the acoustic nerve (c.VIII, Fig 4B and 4C), from where it widens slightly until the vagus ... The facial and acoustic nerves share a short recessus in the ventrolateral part of the endocranial cavity (VII, VIII, rec.VII- ...
Selective Asymmetry of Ocular Vestibular-Evoked Myogenic Potential in Patients with Acute Utricular Macula Loss By: Manzari et ... Acoustic Analysis of Used Tuning Forks. J Int Adv Otol 2017; 13: 239-42. ...
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In this situation magnetic EP, if it is really initiated in macula, appears to be more attractable, if the problem with macula ... Third major problem is the acoustic overlapping. 0.1 ms mechanical stimulus means 10 kHz, and is in the range of the acoustic ... Acoustic cortical areas.. Verification of the VestEP. Short latency VestEP (10 ms) In the electrophysiological experiments it ... 3. The elimination of the acoustic inputs has been the result of the next factors:. *а) all the mechanical components of the ...
cartilage of external acoustic meatus cartilaginous external acoustic tube caudal mesencephalo-cerebellar tract ... immature macula + immature otolith + inferior branch of oculomotor nerve inferior horn of the lateral ventricle ...
4. Color vision is best in the _____, which is a pit in the middle of the macula.. a. fovea centralis c. optic nerve. b. optic ... b. acoustic nerves d. auditory ossicles. ANS: C PTS: 1. 3. Which term describes a condition in which central vision is lost but ...
Macula Luteas use Macula Lutea Macula, Acoustic use Acoustic Maculae Maculae, Acoustic use Acoustic Maculae ...
Macula Luteas use Macula Lutea Macula, Acoustic use Acoustic Maculae Maculae, Acoustic use Acoustic Maculae ...
Macula Luteas use Macula Lutea Macula, Acoustic use Acoustic Maculae Maculae, Acoustic use Acoustic Maculae ...
Macula Luteas use Macula Lutea Macula, Acoustic use Acoustic Maculae Maculae, Acoustic use Acoustic Maculae ...
Macula Luteas use Macula Lutea Macula, Acoustic use Acoustic Maculae Maculae, Acoustic use Acoustic Maculae ...
Acoustic maculae and its function. Vestibular Sensory Cells - Structure of The Ear ...
Localization of acoustic stimuli depends on the detection of the time lag between the arrival of the stimulus at each ear, and ... The sensory cells are located in the ampullae of the semicircular canals and the maculae of the utricle and saccule, and are ... If two acoustic stimuli have similar frequencies but differing intensities, a masking effect occurs. If the difference in sound ... The remarkable ability of human beings to resolve acoustic stimuli is a result of frequency decomposition by the inner ear and ...
Degenerative eye disease that affects macula*Causes the progress loss of central vision, leaving peripheral vision intact ... Perception of sound in the absence of acoustic stimulus*Ringing*buzzing*hissing*whisteling*crickets*bells*roaring*clicking* ...
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As acoustic neuromas increase in size, they eventually occupy a large portion of the cerebellopontine angle. ... Acoustic neuromas are intracranial, extra-axial tumors that arise from the Schwann cell sheath investing either the vestibular ... The posterior portion is filled with a macula crista inferior through which pass the terminal ends of the inferior vestibular ... Diagnosis and management of acoustic neuromas. A study by Foley et al of 945 persons with acoustic neuroma reported unilateral ...
At the point of the retina where it is intersected by the axis of the eye there is a yellow spot, called the macula. Maxwell ... He developed the phenomenon of electrical resonance in parallel to acoustic resonance developed by Lord Rayleigh. Maxwell ...
Macula Kuru. *Magic Tuber Stringband. *Mako Sica. *Mako Sica / Hamid Drake. *Mako Sica / Hamid Drake featuring Tatsu Aoki & ... The music on Unaccompanied Acoustic Guitar Vol. 1 is less violent than the solo side of the Acoustic Guitar/Gifts split. Ive ... Those prior LPs were both issued in 1978, The first was Acoustic Guitar/Gifts a split LP with Loren solo on one side and with ... Loren Connors - Unaccompanied Acoustic Guitar Improvisations Vol.1 LP / Linear Notes by Byron Coley Edition of 500 Co-Released ...
  • Its anterior part exhibits an oval thickening, the macula of saccule (or saccular macula), to which are distributed the saccular filaments of the acoustic nerve. (wikipedia.org)
  • The vestibule is a region of the inner ear which contains the saccule and the utricle, each of which contain a macula to detect linear acceleration. (wikipedia.org)
  • The macula of the utricle is in a horizontal position and detects horizontal acceleration. (wikipedia.org)
  • The utricle and saccule have sensory areas (acoustic maculae) which are innervated by the vestibular nerve. (lecturio.com)
  • The neurosensory structures involved in hearing and equilibrium are located in the membranous labyrinth: the organ of Corti is located in the cochlear canal, while the maculae of the utricle and the saccule and the ampullae of the semicircular canals are located in the posterior section. (cloudaccess.net)
  • The macula of saccule lies in a nearly vertical position. (wikipedia.org)
  • To further study this and gain insight into specific details of the differential motion of the otolith relative to the sensory macula when incident sounds arrive from different directions, three-dimensional finite element models were constructed based on the micro-computed tomography imaging of the sagittal otoliths of the bight redfish ( Centroberyx gerrardi ). (aip.org)
  • The mammalian inner ear contains sensory organs, the organ of Corti in the cochlea and cristae and maculae in the vestibule, with each comprised of patterned sensory epithelia that are responsible for hearing and balance. (biomedcentral.com)
  • Its ampulla is placed inferiorly, and opens into the lower and back part of the vestibule, where may be seen about six or eight small apertures (macula cribrosa inferior), for the transmission of the nerves to this ampulla. (co.ma)
  • Munaeem's Blog: How is acoustic neuroma treated? (munaeem.org)
  • To diagnose an acoustic neuroma, your healthcare provider will ask you about your symptoms and perform a physical exam. (munaeem.org)
  • All patients with sudden SNHL should be imaged for work up of acoustic neuroma, even if they respond to steroids or their hearing spontaneously recovers. (medscape.com)
  • A study by Foley et al of 945 persons with acoustic neuroma reported unilateral hearing loss to be the most common presenting system (80% of patients). (medscape.com)
  • The auricle and external acoustic meatus (or external auditory canal) compose the external ear. (medscape.com)
  • The external acoustic meatus (external auditory canal) is formed by cartilage and bone (temporal). (medscape.com)
  • The mandibular condyle sits anterior to the bony portion of the external acoustic meatus (external auditory canal). (medscape.com)
  • 0.1 ms mechanical stimulus means 10 kHz, and is in the range of the acoustic stimulus. (happyvertigo.com)
  • The problem is that it is necessary to apply the acoustic stimulus intensity of about 100 dBA, which is badly tolerated by the healthy persons and in the majority of the cases is intolerable for the patients. (happyvertigo.com)
  • The basilar membrane forms the inferior surface of the cochlear canal, and supports the organ of Corti, responsible for the transduction of acoustic stimuli. (cloudaccess.net)
  • Acoustic neuromas are intracranial, extra-axial tumors that arise from the Schwann cells, investing either the vestibular or cochlear nerve. (medscape.com)
  • Age-related macular degeneration (AMD) is a condition that affects the macula, which is the part of the eye that provides sharp, central v. (munaeem.org)
  • Researchers do not know why acoustic neuromas form. (munaeem.org)
  • As acoustic neuromas enlarge, they eventually occupy a large portion of the cerebellopontine angle and cause hearing loss, dizziness, and tinnitus. (medscape.com)
  • Acoustic neuromas account for approximately 80% of tumors found within the cerebellopontine angle. (medscape.com)
  • Acoustic neuromas are managed through microsurgical excision, by arresting tumor growth using stereotactic radiation therapy, or through serial observation. (medscape.com)
  • Though acoustic neuromas are generally slow-growing tumors and their associated hearing loss is usually progressive, they may also present with sudden sensorineural hearing loss (SNHL). (medscape.com)
  • Acoustic neuromas are managed in one of the following 3 ways: (1) microsurgical excision of the tumor, (2) arresting tumor growth using stereotactic radiation therapy, or (3) careful serial observation. (medscape.com)
  • The music on Unaccompanied Acoustic Guitar Vol. 1 is less violent than the solo side of the Acoustic Guitar/Gifts split. (feedingtuberecords.com)
  • Various surgical approaches can be used to remove acoustic tumors, including the translabyrinthine approach, the retrosigmoid approach, and the middle cranial fossa approach. (medscape.com)
  • The definitive diagnostic test for acoustic tumors is gadolinium-enhanced magnetic resonance imaging (MRI). (medscape.com)
  • The definitive diagnostic test for patients with acoustic tumors is gadolinium-enhanced MRI. (medscape.com)
  • Ecrit janvier 19th, 2023 par & déposé en vertu de mon casque steelseries ne s'allume plus . (ezzayra.com)
  • Its base corresponds with the area cochleæ on the fundus of the internal acoustic meatus, and exhibits the tractus spiralis foraminosus, which transmits the nerves for the basal and central coils of the cochlea and the foramen centrale, which gives passage to the nerves for the apical coil. (co.ma)
  • In this situation magnetic EP, if it is really initiated in macula, appears to be more attractable, if the problem with macula time constant being overcome. (happyvertigo.com)
  • 4. Color vision is best in the _____, which is a pit in the middle of the macula. (testbank.ltd)
  • The results suggest that the angle of sound energy arrivals at the otoliths and the geometry of the otolith lead to different magnitudes of the differential motion between the macula and otoliths, with sound arriving in the vertical potentially creating more damage than the same sound arriving from the horizontal. (aip.org)
  • Each hair cell of the macula contains 40 to 70 stereocilia and one true cilia, called a kinocilium. (wikipedia.org)
  • the central part of its base corresponds with the bottom of the internal acoustic meatus, whilst its apex or cupula is directed forwards and laterally, and comes into close relation with the semicanal for the tensor tympani muscle. (co.ma)
  • Its base corresponds with the area cochleæ on the fundus of the internal acoustic meatus, and exhibits the tractus spiralis foraminosus, which transmits the nerves for the basal and central coils of the cochlea and the foramen centrale, which gives passage to the nerves for the apical coil. (co.ma)
  • In the internal acoustic meatus the nervus intermedius, lying between the facial and acoustic nerves, sends communicating branches to both of them. (co.ma)
  • It extends between the internal acoustic meatus and stylomastoid foramen . (cloudfront.net)
  • The hair cells in the maculae are innervated by fibers of the VESTIBULAR NERVE . (nih.gov)
  • Nerve fibers enter the maculae from beneath the epithelium to innervate the hair cells. (cdc.gov)
  • In each of the end organs, the sensory epithelium (macula) is overlain by a massive calcium carbonate biomineralisate, the otolith. (biomedcentral.com)
  • The auricle and external acoustic meatus (or external auditory canal) compose the external ear. (medscape.com)
  • The external acoustic meatus (external auditory canal) is formed by cartilage and bone (temporal). (medscape.com)
  • The mandibular condyle sits anterior to the bony portion of the external acoustic meatus (external auditory canal). (medscape.com)
  • external auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. (studybuff.com)
  • Acoustic neuromas are intracranial, extra-axial tumors that arise from the Schwann cells, investing either the vestibular or cochlear nerve. (medscape.com)
  • Disease entities of the inner ear include: congenital malformations, loss of sensory cells and nerve fibers (i.e., sensorineural hearing loss), cochlear otosclerosis, Meniere's disease, acoustic neuroma, or sudden hearing loss. (cdc.gov)
  • However, iodine stained samples of cichlids [ 5 ] did not provide a sufficient contrast to discriminate otolith, otolithic membrane, maculae, and innervating nerve fibers of the VIII th cranial nerve. (biomedcentral.com)
  • The branch to the acoustic nerve probably separates from it again to join the genicular ganglion of the facial nerve. (co.ma)
  • It is an oval swelling on the nerve, and is joined by a branch from the upper (vestibular) trunk of the acoustic nerve, by which it probably receives fibres of the nervus intermedius. (co.ma)
  • Jeff Carey is a well established electro-acoustic composer and multi-instrumentalist from Baltimore, Maryland. (rubberglovesdenton.com)
  • Storyteller is an electro-acoustic spoken word cassette collaboration between writer & occasional filmmaker Bruce McClure and sound artist Bj rn Hatleskog. (adaadat.co.uk)
  • As acoustic neuromas enlarge, they eventually occupy a large portion of the cerebellopontine angle and cause hearing loss, dizziness, and tinnitus. (medscape.com)
  • Acoustic neuromas account for approximately 80% of tumors found within the cerebellopontine angle. (medscape.com)
  • The definitive diagnostic test for patients with acoustic tumors is gadolinium-enhanced MRI. (medscape.com)
  • We investigated whether subtle defects in patients with age-related maculopathy (ARM) can be found in regions of the retina that lie outside the macula, i.e. 10 deg eccentricity. (ski.org)
  • Though acoustic neuromas are generally slow-growing tumors and their associated hearing loss is usually progressive, they may also present with sudden sensorineural hearing loss (SNHL). (medscape.com)
  • Buyukberber describes the projections as "45 minutes of expressively futuristic visual poems, shaping the emergence of cybernetic organism counting down its time code in live acoustic waves of classical music. (vice.com)
  • An acoustic mirror reflects sound waves. (wikipedia.org)
  • PTA staining and subsequent high-resolution contrast enhanced microCT imaging is a powerful method to obtain 3D models of fish inner ears and maculae in a fast and more reliable manner. (biomedcentral.com)
  • Tympanometric peak pressure, equivalent ear canal volume, static acoustic admittance, resonance frequency, and absorbance ratios at peak pressure and ambient pressure values were analyzed. (advancedotology.org)
  • Marvin plays some rhythm guitar in the style of the opening track of Edgar Froese's "Macula Transfer" album to complement the main sequence and overdubbed some lead guitar. (brainvoyagermusic.com)
  • Macula transfer this style, often described as the Berlin School and later Kosmische Musik, has influenced the electronic music genre to the present day and is the blueprint for contemporary music genres like Ambient or Trance. (tangerinedreammusic.com)
  • But tell me again what kind of music is that they're doing like contemporary Christian worship will be the softest, most acoustic version prosecutes it soul droning on and we promise never have lively lively worship in the style doesn't really dictate the worship but not just to get over. (truthnetwork.com)
  • 2 ]). These reconstructions based on histological serial sections were labor-intensive and results were in part uneven as maculae were prone to distortion or artifacts such as disruption during dehydration or embedding procedures. (biomedcentral.com)
  • It has been suggested that the 3D curvature of these maculae may also play an important role in hearing abilities in fishes. (biomedcentral.com)
  • Comparison with maculae that have been 3D reconstructed based on histological serial sections and phalloidin-stained maculae showed high congruence in overall shape of the maculae studied here. (biomedcentral.com)
  • Here, phase-decorrelation measurements on optical coherence tomography (OCT) structural images are combined with acoustic micro-tapping (A$\mu$T) OCE to explore possible reconstruction of depth-dependent stiffness within crosslinked corneas in an ex vivo human cornea sample. (bvsalud.org)