ankle jerk

a reflex extension of the foot, caused by contraction of the muscles of the calf, resulting from a sharp tap on the Achilles tendon; Achilles reflex.
[1885-90]

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Universalium. 2010.

Look at other dictionaries:

  • ankle jerk — n a reflex downward movement of the foot produced by a spasmodic contraction of the muscles of the calf in response to sudden extension of the leg or the striking of the Achilles tendon above the heel called also Achilles reflex …   Medical dictionary

  • ankle jerk — a deep tendon reflex elicited when the Achilles tendon is stretched and then struck with a tendon hammer. The normal response is reflex contraction of the calf muscles and plantar flexion of the ankle. The ankle jerk may be increased if the… …   The new mediacal dictionary

  • ankle jerk — noun : a reflex downward movement of the foot due to a spasmodic contraction of the muscles of the calf caused by sudden extension of the leg or by striking the Achilles tendon above the heel * * * a reflex extension of the foot, caused by… …   Useful english dictionary

  • Ankle jerk reflex — The ankle jerk reflex, also known as the Achilles reflex, occurs when the Achilles tendon is tapped while the foot is dorsi flexed. A positive result would be the jerking of the foot towards its plantar surface. The Achilles reflex checks if the… …   Wikipedia

  • jerk — 1. A sudden pull. 2. SYN: deep reflex. ankle j. SYN: Achilles reflex. chin j. SYN: jaw reflex. crossed j. SYN: crossed reflex. crossed adductor j. SYN: crossed adductor reflex. crossed knee j. SYN: crossed knee reflex. elb …   Medical dictionary

  • jerk — n. the sudden contraction of a muscle in response to a nerve impulse. The knee jerk (see patellar reflex) is the reflex kicking movement produced by contraction of the quadriceps muscle of the thigh after it has been stretched by tapping the… …   The new mediacal dictionary

  • Achilles jerk — ankle jerk triceps surae reflex …   Medical dictionary

  • Jaw jerk reflex — The jaw jerk reflex or the masseter reflex is a stretch reflex used to test the status of a patient s trigeminal nerve (CN V).[1] The mandible or lower jaw is tapped at a downward angle just below the lips at the chin while the mouth is held… …   Wikipedia

  • Knee jerk — The reflex tested by tapping just below the knee causing the lower leg to suddenly jerk forward. What is tapped to elicit this reaction is the patellar tendon, the tendon that runs down from the quadriceps muscle in the front of the thigh, over… …   Medical dictionary

  • A/J — ankle jerk …   Medical dictionary

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