Chapter 14 - Chapter 14: Cognitive Functions Lateralization...

Info iconThis preview shows pages 1–19. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 14: Cognitive Functions
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Lateralization of Function Each hemisphere specialized for different functions Each hemisphere controls contralateral side of body
Background image of page 2
3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Fig. 14-3a, p. 419
Background image of page 4
5 Lateralization of Function Damage to corpus callosum interferes with exchange of information
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6
Background image of page 6
7 Lateralization of Function Corpus callosum matures through first 5 to 10 years Young children have difficulty comparing information from left and right hand Incomplete development of corpus callosum increases development of anterior and hippocampal commisures
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Lateralization of Function Epilepsy Repeated excessive synchronized neural activity Decreased release of GABA Physicians cut corpus callosum to prevent seizure from spreading to opposite hemisphere Split-brain patients
Background image of page 8
9 Lateralization of Function Determining hemispheric dominance Sodium amytal (Wada) test Anesthetize one hemisphere and check language function Dichotic listening Report more digits heard by dominant half Functional brain imaging f MRI or PET
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Lateralization of Function Handedness and Hemispheric Dominance Dextrals: right-handers Sinestrals: left-handers Left-hemisphere dominant in almost all dextrals (92%) and most sinestrals (69%) Females may be less lateralized
Background image of page 10
11 Lateralization of Function Spit brain patients Normal intellect and motivation Use hands independently in a way others cannot Respond differently to stimuli presented to only one side of the body
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12
Background image of page 12
13 Lateralization of Function Immediately after surgery, each hemisphere responds quickly and accurately only to information presented directly Brain learns use smaller connections Difficulty integrating information remains
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
14 Lateralization of Function Emotions Right hemisphere better Damage to parts of right hemisphere causes difficulty perceiving other’s emotions, failure to understand humor and sarcasm, and monotone voice Left hemisphere damage increases ability to accurately judge emotion Decreased left hemisphere interference
Background image of page 14
15 Lateralization of Function Right hemisphere better at spatial relationships Left hemisphere generally focuses on visual details, right hemisphere focuses more on visual patterns
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
16
Background image of page 16
17 Lateralization of Function Language Damage to left hemisphere often results in language deficiencies Left side may be specialized for language from birth Planum temporale asymmetry seems related to language function
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
18 Lateralization of Function
Background image of page 18
Image of page 19
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2008 for the course PSYC 2012 taught by Professor Bashinski, during the Fall '06 term at Colorado.

Page1 / 53

Chapter 14 - Chapter 14: Cognitive Functions Lateralization...

This preview shows document pages 1 - 19. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online