Eye Physiology Tracts

Question 1

Describe the pathway of all optic fibres ?

Answer 1

Optic nerve, Optic chiasma, Optic tract, Synapse with

Lateral geniculate nucleus, Optic radiation, Primary visual cortex

Question 2

Describe the route of the temporal fibres?

Answer 2

Temporal fibres stay on the ipsilateral side

Question 3

Describe the route of the nasal fibres?

Answer 3

Nasal fibres cross at the Optic chiasma

Question 4

Temporal fibres contribute to what visual field

Answer 4

Nasal visual field

Question 5

Nasal fibres contribute to what visual feild

Answer 5

Temporal visual field

Question 6

Lesion at the optic chiasma would cause what?

Answer 6

Bitemporal hemianopia, due to both the nasal fibres being cut

Question 7

Lesion at the optic nerve would cause what?

Answer 7

Blindness in the eye of effected optic nerve

Question 8

Lesion at the right optic tract would cause?

Answer 8

Blindness in the Nasal field on the ipsilateral side, and blindness on the temporal field on the contralateral side
Contralateral homonymous heminopia

Question 9

Lesion of the right optic radiation would cause?

Answer 9

Same as the right optic tract, Contralateral homonymous heminopia