What is the largest component of the diencephalon?5. A male patient with a cortical lesion presents with a difficult, laboured speech withsyntactic and grammatical errors, however, what he says is coherent. Where in thecortex is the lesion likely to be?6. A female patient with 2 separate strokes in the cerebral cortex is unable tovoluntarily move her left hand and right foot. Where are the strokes likely to be,and on which sides of the brain?
Question
What is the largest component of the diencephalon?5. A male patient with a cortical lesion presents with a difficult, laboured speech withsyntactic and grammatical errors, however, what he says is coherent. Where in thecortex is the lesion likely to be?6. A female patient with 2 separate strokes in the cerebral cortex is unable tovoluntarily move her left hand and right foot. Where are the strokes likely to be,and on which sides of the brain?
Solution
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The largest component of the diencephalon is the thalamus. It acts as a relay station for sensory information, processing and transmitting it to the appropriate parts of the brain.
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The described symptoms suggest a lesion in the Broca's area of the brain, which is responsible for speech production. It is located in the frontal lobe, usually in the left hemisphere.
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The inability to voluntarily move the left hand suggests a stroke in the right primary motor cortex, which controls voluntary movements on the left side of the body. The inability to move the right foot suggests a stroke in the left primary motor cortex, which controls voluntary movements on the right side of the body.
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