Sökning: "utricle"

Hittade 4 avhandlingar innehållade ordet utricle.

1. 1. Hair cell regeneration in vestibular epithelia : a study in an in vitro model

   Författare :Mimmi Werner; Diana Berggren; Andrew Forge; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Vestibular hair cell; regeneration; transdifferentiation; proliferation; utricle; rat; oto-rhino-laryngologi; Oto-Rhino-Laryngology;

   Sammanfattning : BackgroundHair cells (HCs) are the sensory receptors in both the auditory and the vestibular organs of the inner ear. Supporting cells (SCs) are non-sensory cells embracing the HCs. Injuries of the HCs by aging, acoustic trauma or ototoxic drugs (mainly aminoglycosides, e.g. LÄS MER

3. 2. The subjective visual horizontal in the diagnosis of vestibular disorders : physiological and clinical considerations

   Författare :Arne Tribukait; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Vestibular system; vestibular tests; vestibular neuritis; Meniere sdisease; gentamicin treatment; vestibular compensation; stapedotomy; spatial orientation; gravity otoliths; utricle; saccule; semicircular canals; subjective visual horizontal; roll;

   Sammanfattning : In the examination of patients with vestibular disturbances the diagnostic techniques are almost entirely focused on the semicircular canals. However, a considerable number of the patients have symptoms which are suggestive of an affection of the otolith organs, e.g. false sensations of tilt or linear motion and even sudden falls. LÄS MER

4. 3. Atomic force microscopic studies of inner ear structure and mechanics

   Författare :Alexandra Zelenskaya; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Atomic force microscopy; indentation curves; mechanical properties; outer hair cells; shell-core model; electromotility; prestin; otoconia; tympanic membrane.;

   Sammanfattning : The transduction processes occurring in the inner ear, from sound induced vibration or head movements to nerve impulses sent to the brain, are to a large part dependent on the mechanical properties of the different components of this organ, especially the sensory hair cells. The function of the hearing organ is for example dependent on the unique mechanoelectric transduction properties of the cochlear outer hair cells (OHCs), which are able to respond to electrophysiological and mechanical stimulations by changing their shape and their mechanical properties. LÄS MER

5. 4. Corticosteroid receptors and Na,K-ATPase in the developing mouse cochlea

   Författare :Susan Erichsen; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :inner ear; stria vascularis; endolymph production; Na; K-ATPase; glucocorticoid receptor; mineralocorticoid receptor; knockout mouse; shaker-2; mix; immunohistochemistry;

   Sammanfattning : The senses of hearing and equilibrium are highly dependent on the fluid and electrolyte homeostasis in the inner ear. The characteristic intracellular-like ionic composition of endolymph fluid in relation to the surrounding perilymph creates the endocochlear potential (EP), which is a prerequisite for inner ear function. LÄS MER