Morphology of physiologically identified otolith-related vestibular neurons in cats.
The morphology of physiologically identified otolith nerve-activated vestibular neurons was investigated using intracellular injections of horseradish peroxidase (HRP). Eleven utricular, 11 saccular and three utricular/saccular nerve-activated vestibular neurons were labeled with HRP. All of these neurons except one were secondary neurons, the exception being a convergent neuron. The labeled neurons were pyramidal, elongated and ovoidal in shape. Most of the labeled cells were medium to large (mean diameter: > or =30 micro m). There was no apparent correlation between morphology and the different types of otolith nerve-activated vestibular neurons. Thus, it seems likely that the functional type of vestibular neurons cannot be presumed on the basis of their morphology alone.
D000818:Animals; D001306:Auditory Pathways / Q000166:cytology* / Q000502:physiology; D001931:Brain Mapping; D002415:Cats; D007758:Ear, Inner / Q000166:cytology / Q000294:innervation* / Q000502:physiology; D004558:Electric Stimulation; D018069:Hair Cells, Vestibular / Q000166:cytology / Q000502:physiology; D006735:Horseradish Peroxidase; D009474:Neurons / Q000166:cytology* / Q000502:physiology; D010037:Otolithic Membrane / Q000166:cytology / Q000502:physiology; D012444:Saccule and Utricle / Q000166:cytology / Q000502:physiology; D013194:Staining and Labeling; D014726:Vestibular Nuclei / Q000166:cytology* / Q000502:physiology
D006735:Horseradish Peroxidase