1. Two hemispheres with different specializations
Right Brain Left Brain
Two hemispheres with different specializations

2. Cortical similarities
Contralateral control over movement
and skin sencses
KW 14-3

3. Sensory Motor Integration
KW 10-2

4. Visual Fields Also contralateral sensation
Right visual world: left brain
Left visual world: right brain
KW 14-17

5. Dorsal and Ventral Streams
KW p.535

6. Hemispheric differences

7. Auditory Cortex
KW 9-12

8. Processing Music
KW 9-24

9. Parietal lobe Assymetry
Parietal larger
Temporal larger
KW 14-14

10. Parietal lobe damage Right: drawings, puzzles, maps
Left: language, naming objects,
Copy movements
KW 14-15

11. KW 14-16
Apraxia

12. Same figure but different orientation?
Spatial Cognition
Same figure but different orientation?
KW 14-4
Yes

13. Which block is the same as one of left?
Spatial Orientation
Which block is the same as one of left?
KW 14-5 a

14. Cognitive Tasks 1 correct Men more likely to Pick correct response
KW 14-21

15. Cognitive Tasks 2
KW 14-21

16. Cognitive Tasks 3
KW 14-21

17. Cognitive Tasks 4
KW 14-21

18. Connecting Link between Hemispheres
Figure 14.1  Two views of the corpus callosum The corpus callosum is a large set of axons conveying information between the two hemispheres. (a) A sagittal section through the human brain. (b) A dissection (viewed from above) in which gray matter has been removed to expose the corpus callosum.

19. Visual Connections to the Hemispheres
Visual Field-what is visible at any moment
Right visual field-->left hemisphere
Left visual field-->right hemisphere
Cutting the Corpus Callosum
Sometimes done to treat severe epilepsy
Behavior is abnormal only when sensory stimuli are limited to one side of the body

20. Split Brain Task 1
KW 14-18

21. Split Brain Task 2
Use left hand to find object
KW 14-19

22. Split Brain Task 3 Each hemisphere is capable
of responding independently
KW 14-19

23. Visuospacial Processing
KW 14-20

24. Split Hemispheres Competition
Soon after surgery you may see competition between activities on the two sides of the body
Hemispheric Specialization
Left
Speech
Movement sequencing
Detail-oriented
Right
Emotional content of speech
Recognizes emotions in others
Expresses fear and anger
Spatial Relationships
Music perception
Animation

25. Development of Lateralization and Handedness
Anatomical Differences between the Hemispheres
Plenum temporale in left hemisphere larger
Corpus Callosum is not fully developed at birth
Handedness does not dramatically affect lateralization
Most left-handed people have left-hemisphere or mixed dominance for speech

26. 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

27. Brain sculpted by experience
Left hemisphere for speech
Right for spatial tasks
Both hemispheres active
Can be resculpted if needed

28. Brain Science has come along way
Still many mysteries to be solved
Treaments for brain diseases
Understanding the causes
Hope course has given you the knowledge to follow these developments