PSYB51H3 Lecture Notes - Lecture 6: Saccade, Frontal Eye Fields, Monocular Vision
Document Summary
Named univariance because only have 1 type of colour receptor (ex. s cones only. Just see different shades and luminance sensitive to lower, shorter wavelengths. Photoreceptors not specific sensitive to many wavelengths. Micro saccades jerky, little eye movements that refresh the retina. Most acute vision is in the fovea. Need eye moevments to move our fovea around. Specifically designed for vision: no other movements are as specialized. Eye movements: based on 6 muscles 6 muscles are attached to each eye and are arranged in 3 pairs. Counter rotations in the head when spinning eye one way, eyes go the other way. 3 dimensions of rotation: left/right, 2 x 3 = 6 muscles. 2 types of eye muscles: rectus. On the top and bottom and on the temporal and nasal sides. Inferior for bottom/superior/ lateral away from eye/ medial: oblique. Inferior underneath eye ; for torsions and vertical. Cn 3 oculomotor innervates almost all eye muscles except 2.
