37917607
Description
Lateralisation and split brain research
- hemispheric lateralisation = looks at the
sole function of each hemisphere
- left hand side more dominant for language
- left hand side more dominant for language
- brocas research
- damage in one part of the hemisphere
has a different impact
- leads to the same area
being damaged in right
hemisphere
- leads to the same area
being damaged in right
hemisphere
- damage in one part of the hemisphere
has a different impact
- corpus collosum = bundle of nerves ( fibers)
- can be cut during surgery for epilepsy severe cases only
- stops electrical activity from seizure spreading to
other hemisphere a form of communication
- these people are referred to split brain patients as
hemispheres= not attached
- these people are referred to split brain patients as
hemispheres= not attached
- stops electrical activity from seizure spreading to
other hemisphere a form of communication
- can be cut during surgery for epilepsy severe cases only
- roger sperry and michael gazzaniga
(1967)
- hemispheric lateralisation
- right visual goes to left hemisphere and left visual goes to
right hemisphere
- method of testing communication from left to right
- picture or word shown to left visual then processed in right hemisphere
- patient wouldnt be able to say due to no lang centres in the right hemisphere
- instead draw it
- picture/word shown to right visual field info processed by left hemisphere
- patient can say what it is as lang centres in left hemisphere
- patient can say what it is as lang centres in left hemisphere
- picture/word shown to right visual field info processed by left hemisphere
- instead draw it
- patient wouldnt be able to say due to no lang centres in the right hemisphere
- picture or word shown to left visual then processed in right hemisphere
- method of testing communication from left to right
- right visual goes to left hemisphere and left visual goes to
right hemisphere
- hemispheric lateralisation
- R hemispheres responsible = visual- spatial processing facial recognition
- L hemisphere responsible = speech and language
- L hemisphere responsible = speech and language
- Evaluation
- Language not restricted to left hemisphere. Initially right hemi not handle basic
lang. gazzangia (1998) disproved. Patient J.W developed ability speak from R
hemi.ability speak about info presented to left and the right side of brain. Not
universal phenomenal. Poor sample lacks validity
- Lateralisation changes with age.across
many types of tasks many brain areas.
Lateralised patterns in younger
individuals tend to switch to bilateral
patterns in healthy adults. Due to
processes not being. Fixed.
Deterministic,experimentally reductionist
- Limitations split brain research.procedure
rarely carried out research becoming out of
date. Andrewes (2001) claims patients used
suffer from pre existing physical disorders
that make the surgery necessary. We can’t
generalise to ovulation lacks reductionism
and generalisability
- Language not restricted to left hemisphere. Initially right hemi not handle basic
lang. gazzangia (1998) disproved. Patient J.W developed ability speak from R
hemi.ability speak about info presented to left and the right side of brain. Not
universal phenomenal. Poor sample lacks validity
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