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7. Tendon Hyperreflexia
Tendon hyperreflexia is one of the symptoms of serotonin syndrome. For a healthy person, your knee should immediately contract when a doctor taps on it. This is due to two neuron reflex arc involving the brain stem segment which controls the muscles. However, someone with hyperreflexia will experience an overactive response to light tapping or repeated reflexes to a single tap.
Have a doctor or yourself tap on the knee’s tendon and if the response is heightened or multiple then you have hyperrflexia. It is best to see a doctor to confirm this symptom instead of self-diagnosing.
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