Lecture 6: Vision

Question 1

this 3 order pathway of visual processing and associated pathways includes: optic ___* (1st), optic ___ (2nd), and optic ___* (3rd)

Answer 1

nerve (synapse from photoreceptors), tract, radiations (axons leaving thalamus to primary visual cortex)

Question 2

choose: if object is on the right, the ( left / right ) temporal retina field is activated

Answer 2

left

temporal retina field : opposite side of visual space :: nasal retinal field : same side of visual space

Question 3

choose: if object is on the right, the ( left / right ) nasal retina field is activated

Answer 3

right

temporal retina field : opposite side of visual space :: nasal retinal field : same side of visual space

Question 4

choose: if object is on the left, the ( left / right ) nasal retina field is activated

Answer 4

left

temporal retina field : opposite side of visual space :: nasal retinal field : same side of visual space

Question 5

choose: if object is on the left, the ( left / right ) temporal retina field is activated

Answer 5

right

temporal retina field : opposite side of visual space :: nasal retinal field : same side of visual space

Question 6

name of the region where axons of the optic nerve related to the nasal retinal fields cross over to synapse with the contralateral geniculate nucleus of the thalamus

Answer 6

optic chiasm

Question 7

true or false: the left and right temporal retina fields cross over, where as the left and right nasal retina fields do not cross over

Answer 7

false, only the left and right nasal retina fields cross over

Question 8

choose: left primary visual cortex processes visual information from the ( left / right ) side of space

Answer 8

right

Question 9

choose: right primary visual cortex processes visual information from the ( left / right ) side of space

Answer 9

left

Question 10

upper portions of the retinal fields (and superior portions of optic radiations) receive visual information from the lower half of visual space; lower portions of the retinal fields (and inferior portions of optic radiations) receive visual information from the ___ half of visual space

Answer 10

upper

Question 11

right homonymous hemianopsia, which involves a right visual field cut usually due to ___, is a blind spot affecting the right visual field

Answer 11

middle cerebral artery stroke

Question 12

primary visual cortex (BA 17) : processes ___ :: primary visual cortex (BA 18, 19) :: processes color, motion, and form

Answer 12

basic light patterns

Question 13

the middle and inferior portions of the temporal cortex are sensitive to specific objects and visual patterns, and may play a role in ___

Answer 13

object and face discrimination

Question 14

dorsal : “where” pathway :: ___ : “what” pathway

Answer 14

ventral

Question 15

name of the pathway that directs the eyes and coordinates touching or grabbing of a desired object

Answer 15

dorsal “where”

Question 16

name of the pathway that allows perception and recognition of items anywhere in the visual field

Answer 16

ventral “what”