anatomy :visual pathway

Question 1

function of optic chiasm

Answer 1

ensure visual signals go to both sides of brain

Question 2

optic tract

Answer 2

transports visual info from optic chaism to lateral geniculate nuclei

Question 3

function of lateral geniculate body

Answer 3

relay station for all axons of retinal ganglion cells helping w vision

Question 4

function of superior colliculus

Answer 4

visual, auditory and somatosensory information are integrated to initiate motor commands

Question 5

what is a optic disk

Answer 5

where ganglion axons cells accumulate and exit the eye

Question 6

the retina : rods

• required for
• components

Answer 6

• dim light and peripheral vision

- inner , outer (contains rhadapsin), rod fibre (nucleus)

Question 7

cones
types
function
components

Answer 7

• types one contains a different pigment, allowing absorption of red, green or blue light
• sharpness of vision and trichromatic vision colour
• inner and outer ((Pigment bearing discs)

Question 8

4 common neurological patterns of vision loss
Lesion at optic nerve
Optic nerve compression
Posterior cerebral artery stroke
blind spot

Answer 8

• Monocular blindness
• Bitemporal hemianopia
• Homonymous hemianopia
• Lesions of the primary visual cortex