A systematic and quantitative evaluation of plantar stimulation: The effect of type, pattern, force of stimulation in eliciting an accurate plantar response.

•Responses to stimulation of sole were studied systematically using a special instrument.•Force of stimulation does not affect the plantar response.•Concept of sensitivity introduced and parameters described.•Extensor responses are reproducible whereas withdrawal responses are not.•Normal leg plantar examination must precede the affected leg in hemiparetic patients.