Question
The following person is performing deep tendon reflex in a patient. Which of these is the correct statement?
| A. |
The root value for this reflex is L I, L2 and L3
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| B. |
Always absent in peripheral neuropathy
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| C. |
The guy is performing it in the wrong way
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| D. |
Deep tendon reflexes are always brisk in motor neuron disease
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Show Answer
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Correct Answer � C
Explanation
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Ans: C. The guy is performing it in the wrong way
(Ref: Ganong 25/e p229)
- This guy is performing the deep tendon reflex in the wrong way.
The mistakes in the technique:
- The feet of the patient should not be touching the bed.
- The quadriceps muscle in the thigh should be exposed.
Knee reflex:
- (L2-L4) Slightly lift up the leg under the knee, and tap the patellar tendon with a reflex hammer.
- There should be a reflex contraction of the quadriceps muscle (knee extension).
- Purpose: To check the function of Quadriceps femoris supplied by femoral nerve(L2, L3, L4)
