Visual Pathways

Question 1

outline the visual pathway from the optic tracts

Answer 1

• signals go to lateral geniculate nucleus in the thalamus
• primary visual cortex located in and around calcarine sulcus in the occipital lobe

Question 2

where are the lower and upper visual field projected to in the 1y visual cortex

Answer 2

• lower - gyrus superior to calcarine sulcus
• converse

Question 3

where in the viusal cortex does the macula project to

Answer 3

• posterior pole (occupies a proportionally large area in relation to the size of its visual field)

Question 4

name of the tract from thalamus to 1y visual cortex

Answer 4

from LGN in thalamus to calcarine sulcus: geniculocalcarine tract

Question 5

Meyers loop

Answer 5

• fibres of the geniculocalcarine tract form part of the internal capsule initially
• lower optic radiation fibres (corresponding to superior visual quadrants) first loop anteriorly around the temporal part of the lateral ventricle and end just below the calcarine sulcus

Question 6

medial longitudinal fasciculus

Answer 6

• a series of crossed fibres in the brainstem formed of both ascending and descending fibres
• links CN III, IV and VI (and also VIII) to integerate the movements of the eyes and the head

Question 7

where is the gustatory cortex located

Answer 7