If a single spinal nerve is cut, the area of tactile loss is always greater than the area of loss of painful sensations, because:
Correct Answer: Degree of overlap of fibres carrying tactile sensation is much less
Description: C i.e. Degree of overlap of fibres carrying tactile sensation is much less. - Degree of overlap of fibres is much lessQ - Greater Overlap of pain sensory units. - Lack of collateralization from adjacent tactile fibres - Rapid collateral regeneration of pain fibres Sensory changes due to interruption of a single peripheral nerve vary, depending on whether the nerve involved is predominantly muscular, cutaneous or mixed. Following injury to a cutaneous nerve, the area of sensory loss is always less than its anatomic distribution because of overlap from adjacent nerve. But area of sensory loss for touch > painQ.
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