Class notes
HEMISPHERIC LATERALISATION
- Course
- Institution
Lecture notes of 3 pages for the course NEUROPSYCHOLOGY at UNN (LECUTRE 21/23)
[Show more]
Seller
Follow
hannahnewton21
Reviews received
Content preview
Lecture 21 - HEMISPHERIC LATERALIZATIONRecap;
- Function-Structure relationship poorly defined
- Basic functions (e.g. vision) can be localized to specific regions
- Localizing more complex functions (e.g. emotions) a little more tricky
Laterality;
- Preferential use of superior functions of the body
- Complex, finely tuned, and specialized (Corballis, 1991)
- Flexibility (having one brain region dedicated to a process makes us more flexible).
- Handedness (Right hand – manipulator/Left hand – holder)
- Asymmetry of the face revealed by constructing composite faces in which the face is
made up of the same two sides.
- Attractiveness – right (Zaidel et al. 1995)
Asymmetries in communication of emotional valence;
- Portraits showing the right side are judged as happier whereas portraits featuring
the left side of the face are judged to express sadness more strongly.
- When asked to say which image is happier, people tend to pick image A (right side of
the face).
- More intense expressions found on the left side (Levy et al. 1983)
Neuroanatomical Asymmetry;
- Hemispheres of the brain look mirror images
- Right frontal larger
- Left occipital larger
- Sylvian fissure and the temporal lobes
- What are the implications of this in terms of function?
Functional Hemispheric Asymmetry;
- Left > rational, verbal, linear and analytic
- Right > emotional, spatial, holistic, and intuitive (van Lancker, 1997)
- Left versus right; western versus eastern styles of thinking (Corballis,
1991). The Duality of Mind (Wigan, 1844).
- Left versus Right Brain Function: Common Beliefs (shown in picture).
Roger Sperry & the split-brain procedure;
- The corpus callosum is the primary means of communication between the 2
hemispheres
- In 1960’s, Roger Sperry and Michael Gazzaniga
carried out numerous studies in patients who had
undergone commissurotomy to contain the spread
of epileptic seizures.
- The procedure allows subsequent assessment of
how the two hemispheres operate in relative
isolation (visual information presented to one
hemisphere does not transfer). By cutting this
communication pathway there isn’t such a dramatic
effect as you may think.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller hannahnewton21. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.65. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77988 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now