PSYC 101 Lecture Notes - Lecture 16: Lateral Geniculate Nucleus, Optic Chiasm, Visual Cortex

• School: UBC
• Department: Psychology
• Course: PSYC 101
• Professor: Steven Barnes, Grace Truong

Document Summary

From the eye to the primary visual cortex. Path of signal: retina, optical tract, cross over at optic chiasm, lateral geniculate nucleus of the thalamus, primary visual cortex. Pops of neurons tuned to respond to edges of specific orientations at each position of the visual field. Coordinated activity of all these features detectors contribute to our perception of the world. Pic: response of a single neuron to bars of varying orientations. ** when the shape is tilted, the action potentials firing change frequencies. Defines the shape and identity of an object. How does our brain bind features so that we see unified objects: binding problem. When features from sep objects are mistakenly combined. Focused attention req not to detect every ind feature but req to bind the features together. Must combine link features of an image processed in distinct parts of the ventral(what) stream at a particular spatial location.