Sökning: "ganglion"

Visar resultat 1 - 5 av 115 avhandlingar innehållade ordet ganglion.

1. 1. The Human Spiral Ganglion

   Författare :Sven Tylstedt; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Otorhinolaryngology; human spiral ganglion; ultrastructural morphology; neural interaction; synaptophysin; connexin; membrane specializations; synapse; gap junction; tight junction; Otorhinolaryngologi; Otorhinolaryngology; Otorhinolaryngologi; Oto-Rhino-Laryngology; oto-rhino-laryngologi;

   Sammanfattning : Our knowledge of the fine structure of the Human Spiral Ganglion (HSG) is still inadequate and new treatment techniques for deafness using electric stimulation, call for further information and studies on the neuronal elements of the human cochlea. This thesis presents results of analyses of human cochlear tissue and specimens obtained during neurosurgical transpetrosal removal of life-threatening meningeomas. LÄS MER

3. 2. Neurotrophic Factor Receptors in the Normal and Injured Visual System : Focus on Retinal Ganglion Cells

   Författare :Niclas Lindqvist; Finn Hallböök; Anders Kvanta; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurosciences; cell survival; gene expression; neurotrophic factor; receptor; retina; visual system; Neurovetenskap; Neurology; Neurologi; Developmental Neurosciences; Medicinsk utvecklings- och neurobiologi;

   Sammanfattning : The focus of this thesis is the life and death of adult retinal ganglion cells (RGCs). RGCs are neurons that convey visual information from the retina to higher centers in the brain. LÄS MER

4. 3. Retinal ganglion cell examination with Optical Coherence Tomography reflects physiological and pathological changes in the eye and the brain

   Författare :Abbas Al-Hawasi; Neil Lagali; Yumin Link; Per Fagerholm; Per Söderberg; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Retinal ganglion cell; Retinal nerve fiber layer; Optical Coherence Tomography;

   Sammanfattning : The retinal ganglion cell is situated in the inner retina and its axons, composing the retinal nerve fiber layer (RNFL), leave the eye to form the optic nerve. These cells develop embryologically from the forebrain and later during development re-establish connections with different parts of the brain serving different purposes. LÄS MER

5. 4. Neural limits of visual resolution

   Författare :Zoran Popovic; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cell separation; cortical magnification; detection; estimated receptive field; high-pass filtered optotypes; nyquist limit; psychophysics; resolution; ganglion cells;

   Sammanfattning : Aims: The aim of this thesis was to formulate a model of retinal neural circuitry in humans based on morphological estimates of retinal cone and ganglion cell populations, to compare results based on this model to psychophysical measurements of visual resolution and identify the retinal neural factors that limit visual resolution.Materials & Methods: Total displacement of central ganglion cells from foveal cones was obtained by estimating the length of fibers of Henle in four human retinas along the nasal or vertical hemi-meridians. LÄS MER

7. 5. Effects of Denervation and Infravesical Obstruction in the Rat Urinary Bladder

   Författare :Tord Berggren; Urologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Infravesical obstruction; Lactate dehydrogenase; Atropine; Hypertrophy; Vasopressin; Ultrastructure; Parasympathetic nerves; Smooth muscle; Pelvic Ganglion; Rat Urinary Bladder; Ganglionectomy; Cystometry; Denervation.truction; Urology; nephrology; Urologi; nefrologi;

   Sammanfattning : Median micturition volume decreased early after partial outlet obstruction, 24 hrs total obstruction and hemidenervation. Degeneration release of transmitter may explain this, assuming that bladder wall distension causes nerve degeneration. LÄS MER