A man loses his right hand in a farm accident, four year later, he has episodes of severe pain in the missing hand (phantom limb pain). A detailed PET scan study of his cerebral cortex might be expected to show
Correct Answer: Projection of fibers from neighbouring sensory areas into the right hand area of his left somatic sensory area I
Description: When a body part is amputated, the somatosensory area that represents the neighbouring part of the amputated part spreads over to the somatosensory area that represents the amputated area- Cortical plasticity. This may describe the phenomenon of phantom limb. Since representation in somatosensory area is of contralateral side, cortical plasticity occurs in the opposite side of somatosensory area.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now