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The Brain. Localization of function . Language: 3 Areas of Importance. Motor cortex- movement of mouth and tongue Broca’s area- speech and grammar Wernicke’s area- language comprehension. Motor cortex. Somatosensory cortex. Brain has 2 Hemispheres. Left & Right sides are separate
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Language: 3 Areas of Importance • Motor cortex- movement of mouth and tongue • Broca’s area- speech and grammar • Wernicke’s area- language comprehension
Brain has 2 Hemispheres • Left & Right sides are separate • Corpus Callosum : major nerve pathway between hemispheres
Localization of Function • Left hemisphere: • Right hemisphere:
Primary Visual Pathway • Information from each visual field crosses over at the optic chiasm and projects to the opposite side of the primary visual cortex
Sensory and motor signals controlled by opposite hemisphere • Left side of brain controls right side feeling and movement • Right side of brain controls left side feeling and movement • Damage affects body accordingly
Corpus Callosum • What happens when the corpus callosum is cut?
“What did you see?” “Using your left hand, Pick up what you saw.” “What did you see?” ?? I saw an apple. Verbal left hemisphere Nonverbal right hemisphere Verbal left hemisphere Nonverbal right hemisphere The ‘Split Brain’ studies • Picture to right brain • can’t name the object • left hand can identify by touch • Picture to left brain • can name the object • left hand cannot identify by touch