How does the stretch reflex cause the quadriceps femoris muscle group to contract?

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Biology

Sylvia Howard

25 January, 14:48

How does the stretch reflex cause the quadriceps femoris muscle group to contract?

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Killian Nichols · Answer 1

Tapping on the patellar tendon stretches receptors called the muscle spindles in the quadriceps muscle group of the anterior thigh. This stimulus evokes a rapid motor reflex to contract the quadriceps and shorten the muscles. This process is called the patellar reflex.