plantar reflex

Từ điển WordNet v3.1 - WordNet Dictionary

noun

flexion of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front in persons over the age of 2 years;
under 2 years the results should be extension of the toes (Babinski reflex)
• Hypernyms:
reflex, reflex response, reflex action, instinctive reflex, innate reflex,
inborn reflex, unconditioned reflex, physiological reaction