BRAIN
CRANIAL NERVES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A herniated disc that causes sensory changes in a specific dermatome pressing on:
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Anterior primary ramus
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Anterior gray horn of the spinal cord
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Anterior root
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Posterior primary ramus
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Spinal nerve or posterior root
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Explanation:
Detailed explanation-1: -L3 or L4 impingement from a herniated disc may lead to an abnormal reflex when the area just below the knee is tapped with the rubberized reflex hammer. This is called the patellar reflex. Pain from an L3 or L4 impingement usually radiates to the quadriceps femoris muscle at the front of the thigh.
Detailed explanation-2: -The most common levels for a herniated disc are L4-5 and L5-S1. The onset of symptoms is characterized by a sharp, burning, stabbing pain radiating down the posterior or lateral aspect of the leg, to below the knee. Pain is generally superficial and localized, and is often associated with numbness or tingling.
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