GSU NEUR 3000 - NEUR 3000 - Chapter 10 (18 pages)

Previewing pages 1, 2, 3, 4, 5, 6 of 18 page document View the full content.
View Full Document

NEUR 3000 - Chapter 10



Previewing pages 1, 2, 3, 4, 5, 6 of actual document.

View the full content.
View Full Document
View Full Document

NEUR 3000 - Chapter 10

36 views


Pages:
18
School:
Georgia State University
Course:
Neur 3000 - Hon Principles of Neuroscience

Unformatted text preview:

THE CENTRAL VISUAL SYSTEM NEUR 3000 Dr Joseph J Normandin THE VISUAL SYSTEM PATHWAY THE LATERAL GENICULATE NUCLEUS The LGN receives input from ganglion retinal cells Layers 1 4 6 receive input from the eye on the opposite side Layers 2 3 5 receive input from the eye on the same side Two inner layers are magnoceullar Receive information from M type ganglion cells Four outer layers are parvocellular Receive information from P type ganglion cells Between each layer is the koniocellular layer of tiny cells THE LATERAL GENICULATE NUCLEUS PRIMARY VISUAL CORTEX Primary visual cortex V1 striate cortex receives input from the LGN Cortical cells don t respond to simple stimuli like a point of light A lot of information about lots of points of light in your visual field is combined here Cortical cells can respond to Orientation of a stimulus Motion of a stimulus Location of a stimulus PRIMARY VISUAL CORTEX PRIMARY VISUAL CORTEX Primary visual cortex V1 striate cortex receives input from the LGN Cortical cells don t respond to simple stimuli like a point of light A lot of information about lots of points of light in your visual field is combined here Simple cortical cells Respond to an edge or bar with particular orientation and location Complex cortical cells Respond to an edge or bar with particular orientation irrespective of location PRIMARY VISUAL CORTEX PRIMARY VISUAL CORTEX When stained to reveal cytochrome oxidase there is a distinct structure to striate cortex Blobs and Interblobs Everything we have spoken of so far occurs in neurons of the Interblob regions The Blob regions do not respond to orientation or motion but rather to particular wavelengths of light Color PRIMARY VISUAL CORTEX EXTRASTRIATE CORTEX V1 sends projections to other visual cortical areas that are organized into two streams The ventral what pathway Identifies objects The dorsal where pathway Identifies motion EXTRASTRIATE CORTEX The ventral what pathway The perception of form V1 V2 V3 V4 IT Cells in



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view NEUR 3000 - Chapter 10 and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view NEUR 3000 - Chapter 10 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?