When a person is stung on the index finger by a bee, the thalamus interprets the pain as:
A) Somewhere on the hand
B) A spot on the index finger
C) Attributable to a bee stung
D) Similar to a previous bee sting
Ans: A
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The basic sensation of hurtfulness, or pain, occurs at the level of the thalamus. In the neospinothalamic system, interconnections between the lateral thalamus and the somatosensory cortex are necessary to add precision and discrimination to the pain sensation. In addition, association areas of the parietal cortex are essential to the learned meaningfulness of the pain experience. For example, if a person is stung on the index finger by a bee and only the thalamus is functional, the person reports pain somewhere on the hand. With the primary sensory cortex functional, the person can localize the pain to the precise area on the index finger. With the association cortex functional, the person can interpret the buzzing and sight of the bee that preceded the pain as being related to the bee sting.
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