PSYB51H3 Lecture Notes - Lecture 6: Optic Nerve, Oculomotor Nerve, Monocular Vision
Lecture 6 space perception and binocular vision. The brain creates a 3d image from the projection. Our retinas are 2-dim projection surfaces with foveae. That require eye movements: em help but also complicate things, oculomotor control, spatial constancy. That require 3d info to be recovered from flattened and distorted images: recall plat"s shadows in the cave (secret of success) turning a disadvantage into an opportunity. The 6 muscles attached to each eye are arranged in 3 pairs: Inferior/superior oblique: 6 rotation directions (vertical up/down, horizontal left/right, rotational clockwise/counter-clockwise) Almost all muscles are controlled by cranial nerve iii (oculomotor nerve) whose nucleus is in the midbrain. Cranial nerve iv: trochlea nerve, trochlea nerve is located in caudal midbrain. Cranial nerve vi-abducens, turns eye away from nose. Lateral muscles, abducens nucleus is located in pons. Recall that vision is controlled mostly by cranial nerve ii.