Class Notes (806,977)
Canada (492,550)
Psychology (7,610)
PSYB65H3 (519)
Ted Petit (310)

PsyB65-LEcture 5

4 Pages
Unlock Document

University of Toronto Scarborough
Ted Petit

Psyb65: October 17, 2011 Lecture 5 - visual system is divided into two halves - the retina is divided into two halves - the portion of the retina closest to the nose, the nasal portion - portion closest to outside, temporal portion - The point were all the nerves meet are the optic nerves, they come together at the optic chiasm. - To get to the brain, they separate...this is the optic tract - the nerves from the temporal portion remain on the same side and go to the cortex - the ones closest to the nose, they cross over....the nasal portion crosses The Eye - pupil: small opening for light to get into the eye - the left visual field hits a certain portion of both eyes, the right hand side of each eye - right visual will hit the left hand side of each eye - everything you see on the right visual field will go to the left cortex and vice versa - blinding the nasal portion of the retina, person will be blind in their peripheral portion of the visual field - need to test one eye at a time, because the other eye can see as well - macular sparing: little part in the centre that you can see... What is the function of the nervous system at each of these levels? - the more advance the area of the brain, a more complex image is excited - damage to the visual cotex: complete damage to the right occipital cortex: you will get complete blindness in the left hand side, except for the macualar sparring - incomplete damage here as well: partial blindness in the opposite visual field - little damage: little blindness in the opposite visual field - a little tiny area: scotoma, small area of blindness in the visual field - naturally occuring scotoma: no rods and cones at a certain part= blind spot - legions to higher visual fields: 20 21= problems in perception of complex visual material...faces - more on the left: verbal information - right: spatial information - visual agnosia: agnosia= can't do it, can't understand - inability to recognize objects for what they are - they can see these things but cannot describe it or associate it with its function - caused by damaged to left occipital lobe - prosopagonosia: cannot recognize faces...may not be able to recognize other complex objects...bilateral damage to areas 18 19...surround areas 17 - colouragnosia: problem with colors,,,seem less intense...bilateral damage to the occiptal temporal....generally not the case where the person loses full color in somatosensory system:damage - altered sensory thresholds, how much they c
More Less

Related notes for PSYB65H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.