Class Notes (923,079)
CA (543,061)
UTSC (32,990)
Psychology (8,026)
PSYB65H3 (525)
Ted Petit (310)
Lecture 9

detailed lecture 9 notes

3 Pages
84 Views

Department
Psychology
Course Code
PSYB65H3
Professor
Ted Petit

This preview shows page 1. Sign up to view the full 3 pages of the document.
Lecture NotesLecture 9:Lateralization
(Left Hemisphere = Speech, Right Hemisphere = Music/Spatial)1
HISTORICAL PERSPECTIVES
Most of the brain lateralization information was gathered through wars (WWII)
They realized that different brain damages caused different symptoms (some can't speak etc)
These information are all based on adults (soldiers).
Research in Brain Damages in Adults (WW2 Soldiers):
Left Hemisphere Damaged Soldiers
100% of these patients show some aphasic symptoms (language problems).
approximately 30% of these patients showed SOME sort of recoveries, and these were either
LEFT handed individuals or they're Ambidextrous (both-handed).
The least amount of recovery was in the RIGHT handed patients.
Thus they concluded that left hemisphere is responsible for language.
Right Hemisphere Damaged Soldiers
These soldiers showed very few language problems, and rarely did it lead to some form of
aphasia.
The patients that did show aphasic symptoms, were all LEFT handed or ambidextrous.
Most of these left handed patients showed recovery from the language problems.
Thus they suggested that Language is bilaterally represented (Language is on both hemispheres)
Also, they suggested that if you're right handed, language is on your left hemisphere. If you're
left handed, language is on both sides (thus if you get damaged on either sides of the brain, you
will have some sort of language problems. However, the good part is that if one side of the brain
is damaged, the other side can take over and slowly learn, thus might slowly recover).
Research in Brain Damages in Children (Under the age of 5)
Damage to EITHER side of the brain has equal probability of inducing aphasic symptoms.
However, 100% kids show some degree of recovery.
Thus, some language is found on both sides of the infants brain, also, language is not yet
lateralized in these young infants. Moreover, over time, through development, language is slowly
lateralized to left side of the brain.
Because the development of the brain in infants is extremely plastic (neuroplasticity), if the
infants got a heavily damaged hemisphere of the brain, it's better to just take the whole thing out
rather than leave it in there (seizures). Amazingly, the other side of the brain will take complete
control, and hardly any problems are spotted within the child.
Acallosal patients (Patients born without a carpus callosum)
These patients as adults have language components on both hemisphere of the brain.
Thus we conclude that when we were first born, both hemispheres of our brain are capable of
learning language. However as we mature and begin to develop language, the left hemisphere
becomes dominant over language, and it becomes more competent in it. Also, the overly
development of the left hemisphere actively suppresses the right hemisphere.
So... what is so special about left hemisphere?
People did anatomical study on the left hemisphere of the brain looked into the dorsal,
www.notesolution.com

Loved by over 2.2 million students

Over 90% improved by at least one letter grade.

Leah — University of Toronto

OneClass has been such a huge help in my studies at UofT especially since I am a transfer student. OneClass is the study buddy I never had before and definitely gives me the extra push to get from a B to an A!

Leah — University of Toronto
Saarim — University of Michigan

Balancing social life With academics can be difficult, that is why I'm so glad that OneClass is out there where I can find the top notes for all of my classes. Now I can be the all-star student I want to be.

Saarim — University of Michigan
Jenna — University of Wisconsin

As a college student living on a college budget, I love how easy it is to earn gift cards just by submitting my notes.

Jenna — University of Wisconsin
Anne — University of California

OneClass has allowed me to catch up with my most difficult course! #lifesaver

Anne — University of California
Description
Lecture Notes Lecture 9:Lateralization (Left Hemisphere = Speech, Right Hemisphere = MusicSpatial) 1 HISTORICAL PERSPECTIVES Most of the brain lateralization information was gathered through wars (WWII) They realized that different brain damages caused different symptoms (some cant speak etc) These information are all based on adults (soldiers). Research in Brain Damages in Adults (WW2 Soldiers): Left Hemisphere Damaged Soldiers 100% of these patients show some aphasic symptoms (language problems). approximately 30% of these patients showed SOME sort of recoveries, and these were either LEFT handed individuals or theyre Ambidextrous (both-handed). The least amount of recovery was in the RIGHT handed patients. Thus they concluded that left hemisphere is responsible for language. Right Hemisphere Damaged Soldiers These soldiers showed very few language problems, and rarely did it lead to some form of aphasia. The patients that did show aphasic symptoms, were all LEFT handed or ambidextrous. Most of these left handed patients showed recovery from the language problems. Thus they suggested that Language is bilaterally represented (Language is on both hemispheres) Also, they suggested that if youre right handed, language is on your left hemisphere. If youre left handed, language is on both sides (thus if you get damaged on either sides of the brain, you will have some sort of language problems. However, the good part is that if one side of the brain is
More Less
Unlock Document


Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

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


OR

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.


Submit