Trace the language pathway of signals from the eye (written words) or the ear (spoken words) to the motor cortex. Discuss the two regions of the cortex involved in this pathway. Describe their location and the communication problems that can occur if there is damage to either area.
What will be an ideal response?
eye ?visual cortex ?Wernicke's area ?Broca's area ?motor cortex
ear ?auditory cortex?Wernicke's area ?Broca's area ?motor cortex
Wernicke's area is located in the temporal lobe. If damage occurs here, the person cannot understand sensory input (spoken or visual). The resulting condition is receptive aphasia, nonsensical speech that the speaker is unaware of. Broca's area is located in the frontal lobe. If damage occurs here, the person is unable to respond using normal
syntax. The resulting condition, expressive aphasia, is difficult to deal with because people who have it understand sensory input and can respond, but their statements contain the right words in random order and they are unable to correct it.
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