Which functional area of the cerebrum is responsible for perception of touch, coldness and warmth?

Question

BlackTom AI · Accepted Answer

To begin analyzing the question, we identify the core function in question: perception of touch, coldness, and warmth.
Option 1: optic nucleus. This is a distractor; the optic pathway involves the retina and visual processing centers (such as the lateral geniculate nucleus in the thalamus), not somatosensory perception. Therefore, this option does not fit the described sensory modality.
Option 2: hippocampus. The hippocampus is primarily associated with memory formation and spatial navigation. It is not specialized for processing tactile or temperature-related sensory information, so this choice is incorrect for the asked function.
Option 3: primary somatosensory cortex. This area, located in the postcentral gyrus of the parietal lobe, is the textbook region responsible for processing somatosensory inputs, including touch, temperature (cold and warm), pain, and proprioception. It receives afferent signals from the body and creates a topographic representation, making this the correct option for the described perception.
Option 4: primary motor cortex. The primary motor cortex controls voluntary motor commands and movement execution, not sensory perception. While it interacts with sensory areas for coordinated action, it does not mediate the perception of touch or temperature, so this choice is incorrect.
In summary, while distractors focus on vision (optic nucleus) or memory (hippocampus) or motor control (primary motor cortex), the primary somatosensory cortex uniquely accounts for the perception of touch and temperature sensations described in the question.

Which functional area of the cerebrum is responsible for perception of touch, coldness and warmth?单项选择题

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