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n. an automatic or involuntary activity brought about by relatively simple nervous circuits, without consciousness being necessarily involved. Thus a painful stimulus such as a pinprick will bring about the reflex of withdrawing the finger before the brain has had time to send a message to the muscles involved. See conditioned reflex, patellar reflex, plantar reflex, pupillary reflex, rooting reflex.

Subjects: Science and Mathematics — Medicine and Health.

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