Download - Psychology Right and Left Brain
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Right Brain Left Brain
Two hemispheres with different
specializations
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Cortical similarities
KW 14-3
Contralateral control over movement
and skin sencses
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Sensory MotorIntegration
KW 10-2
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KW 14-17
Visual
Fields
Also contralateral sensation
Right visual world: left brain
Left visual world: right brain
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Dorsal and
Ventral Streams
KW p.535
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Hemispheric differences
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Auditory Cortex
KW 9-12
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Processing Music
KW 9-24
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Parietal lobe Assymetry
KW 14-14
Parietal larger Temporal larger
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Parietal lobe
damage
KW 14-15
Right: drawings, puzzles, maps
Left: language, naming objects,Copy movements
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Apraxia
KW 14-16
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Spatial Cognition
KW 14-4
Same figure but different orientation?
Yes
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Spatial Orientation
KW 14-5
Which block is the same as one of left?
a
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Cognitive
Tasks 1
KW 14-21
correct
Men more likely toPick correct response
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Cognitive
Tasks 2
KW 14-21
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Cognitive
Tasks 3
KW 14-21
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Cognitive
Tasks 4
KW 14-21
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Figure 14.1 Two views of the corpus callosumThe corpus callosum is a large set of axons conveying information between thetwo hemispheres. (a) A sagittal section through the human brain. (b) A dissection
(viewed from above) in which gray matter has been removed toexpose the corpus callosum.
Connecting
Link between
Hemispheres
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Visual Connections to the Hemispheres
Visual Field-what is visible at any moment
Right visual field-->left hemisphere
Left visual field-->right hemisphereCutting the Corpus Callosum
Sometimes done to treat severe epilepsy
Behavior is abnormal only when sensory stimuli are limited toone side of the body
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Split Brain Task 1
KW 14-18
S lit B i T k 2
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Split Brain Task 2
KW 14-19
Use left hand tofind object
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Split Brain Task 3
KW 14-19
Each hemisphere is capableof responding independently
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Visuospacial Processing
KW 14-20
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Split Hemispheres
CompetitionSoon after surgery you may see competition between activities
on the two sides of the body
Hemispheric Specialization
Left
SpeechMovement sequencing
Detail-oriented
Right
Emotional content of speech
Recognizes emotions in othersExpresses fear and anger
Spatial Relationships
Music perception
Animation
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Development of Lateralizationand Handedness
Anatomical Differences between the Hemispheres
Plenum temporale in left hemisphere larger
Corpus Callosum is not fully developed at birthHandedness does not dramatically affect lateralization
Most left-handed people have left-hemisphere or mixeddominance for speech
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Speech and Handedness First communication most likely hand
signals
Right hand preferred most humans Right hand controlled by left brain
Signal language tied to spoken
language Hand gestures to phonemes
Communication is left hemisphere task
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Brain sculpted by experience Left hemisphere for
speech
Right for spatialtasks
Both hemispheresactive
Can be resculpted ifneeded
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Brain Science has come along way
Still many mysteries to besolved
Treaments for braindiseases
Understanding the causes
Hope course has given youthe knowledge to followthese developments