BRAIN
CEREBELLUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pendular knee jerk is due to the lesion of
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Archicerebellum
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Paleocerebellum
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Neocerebellum
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None of the above
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Explanation:
Detailed explanation-1: -The knee jerk reflex is mediated by the L3 and L4 nerve roots, mainly L4. Insult to the cerebellum may lead to pendular reflexes. Pendular reflexes are not brisk but involve less damping of the limb movement than is usually observed when a deep tendon reflex is elicited.
Detailed explanation-2: -Clinical significance On the other hand, multiple oscillation of the leg (pendular reflex) following the tap may be a sign of cerebellar diseases. Exaggerated (brisk) deep tendon reflexes such as this can be found in upper motor neuron lesions, hyperthyroidism, anxiety or nervousness.
Detailed explanation-3: -Hypotonia. “Pendular” knee jerk, leg keeps swinging after knee jerk more than 4 times (4 or less is normal).
There is 1 question to complete.