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Patellar reflex hammer

Patellar reflex hammer

M390/0811

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Credit

MIRIAM MASLO / SCIENCE PHOTO LIBRARY MIRIAM MASLO / SCIENCE PHOTO LIBRARY

Caption

Reflex hammer for testing neuromuscular reflexes. The most famous of these is the knee jerk, or patellar, reflex. In this, a tap below the knee cap (patella) causes the leg to kick. This is due to a reflex arc, an automatic nerve pathway that does not involve the brain. Weak or absent reflexes may be indicative of a disorder.

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