Review Questions

Question 1

What structure is involved in color vision. High excitation threshold

Answer 1

Cones

Question 2

Everything caudal to the optic chiasm is carrying what kind of information?

Answer 2

Contralateral homonymous sensation

Question 3

The temporal retina (nasal visual hemifield) synapse where?

Answer 3

Ipsilateral LGN

Question 4

Nasal retina (temporal visual field) synapse where?

Answer 4

Cross in the chiasm to the contralateral LGN

Question 5

After synapse game in the LGN, nerve impulses proceed to the primary visual cortex by way of visual radiations )geniculocalcarine radiations and optic radiations). What kind of fibers are these that are leaving the LGN?

Answer 5

Efferent

Question 6

Geniculocalcarine fibers carrying visuotpic info from the upper halves of both retinae (lower visual hemifields) reach what area?

Answer 6

Superior bank of the calcarine fissure (cuneus)

Question 7

Geniculocalcarine fibers carrying visuotopic info from the lower halves of both retinae (upper visual hemifield) reaches where?

Answer 7

Inferior bank of calcarine fissure (Lingual Gyrus)

Loop is called the Meyer’s loop

Question 8

The secondary visual pathway travels from the superior colliculus and projects to where?

Answer 8

Prestriate visual areas

Question 9

Loss of PPRF and abducens results in what?

Answer 9

Loss of horizontal gaze to the side of the lesion

Question 10

Lesion of the abducens nerve fibers results in what?

Answer 10

Esotropia (unopposed adduction of the ipsilateral eye)