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Vision & Auditory
Neuroanatomy - Vision & Auditory
Question | Answer |
---|---|
Blindness in one eye | Lesion in optic nerve |
Loss of peripheral vision | bitemporal hemianopsia |
Loss of peripheral vision | Lesion in optic chiasm |
Loss of nasal visual field | nasal hemianopsia |
Loss of nasal visual field | Lesion in lateral side of chiasm |
Loss of R or L visual field | homonymous hemianopsia |
Loss of R or L visual field | Lesion in optic tract or cortex |
Loss of quadrant (both eyes) | superior quadrant anopsia |
Loss of quadrant (both eyes) | Lesion in Meyer's loop |
Spiral ganglion | no synapses (like dorsal root) axons create cochlear nerve |
Cochlear Nuclei | cochlear nerve synapses, output forms lateral lemniscus |
Trapezoid body | decussating fibers destined for lateral lemniscus |
Inferior colliculus | termination of lateral lemniscuc, projects to medial geniculate nucleus |
Medial geniculate nucleus | projects to auditory cortex in temporal lobe (area 41) |
Vestibular ganglion | vestibular equivalent of spiral ganglion, synapses in vestibular nuclei |
Vestibular nuclei | output to cerebellum; inferior cerebellar peduncle |
Vestibular nuclei | control of eye movement: medial longitudinal fasciculus (MLF) |
Vestibular nuclei | control of head and upper limbs: medial vestibulospinal tract |
Vestibular nuclei | controls lower limbs: lateral vestibulospinal tract |