Which of the following spinal tracts controls the skilled voluntary movements?
Correct Answer: Lateral coicospinal tract
Description: The lateral coicospinal tract is concerned with skilled movements of the extremities. Lesion of coicospinal tract results in hypotonia. hyperactive deep tendon reflexes, extensor toe response (Babinski sign) and loss of superficial abdominal reflexes. Rubrospinal tract: It is primarily concerned with the flexor muscle group tone and represents a nonpyramidal pathway of motor control. Lesions rostral to the red nucleus remove coical inhibition of rubrospinal neurons resulting in flexor posturing. Medullary reticulospinal tract: It inhibits antigravity muscles, depresses cardiovascular response and inspiratory phase of respiration. Lesion result in increase in extensor tone or decerebrate rigidity. Pontine reticulospinal tract: facilitate antigravity muscles. Lesion result in decerebrate rigidity.
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