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Primitive Reflexes - The Foot Grasp Reflex

Last updated on Thursday, December 9 2010 by freeman45

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Test: Pressure on the sole of the foot elicits this reflex.  In video, you can see the examiner place his finger just under the toes of the infant and apply pressure.

Normal response: The infant's toes flex, or grasp.

Appears: 28 weeks, peaks at 32 weeks

Disappears: 2-3 months. The extrapyramindal motor system maturation may result in cessation of this reflex.

Abnormal persistence: >6 months

Asymmetrical PNS disease (root, plexus, or nerve problem)
Exaggerated, nonhabituating severe bilateral cerebral disease
Persistance >6mo  athetoid cerebral palsy


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