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patellar reflex
(redirected from Knee jerk reaction)

   Also found in: Dictionary/thesaurus, Wikipedia 0.36 sec.
patellar reflex
n.
A reflex contraction of the quadriceps muscle resulting in a sudden involuntary extension of the leg, produced by a sharp tap to the tendon below the patella. Also called knee jerk, knee-jerk reflex, knee reflex, quadriceps reflex.

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This has prompted outrage from Muslim clerics, as well as an embarrassing knee jerk reaction from the Bush administration to back off from traditionally close Evangelical Christian ties to the White House.
Of course, many of us are still scared, but you can't have a knee jerk reaction when you are making decisions like that," she said.
 
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