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When a doctor taps your knees with a reflex hammer, they are testing the patellar reflex, which is an involuntary response. This action stimulates the stretch receptors in the quadriceps muscle, causing it to contract and the lower leg to kick out. The response helps the doctor assess the functioning of the nervous system, particularly the spinal cord and the pathways involved in reflex actions. A normal reflex indicates healthy nerve function, while an abnormal response may suggest neurological issues.

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3mo ago

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