Palmomental reflex is seen in lesions of –

Pahnomental reflex A stimulus to the thenar area of the hand causes a reflex contraction of ipsilateral orbicularis oris and mentalis muscles. It is a primitive reflex which is inhibited by frontal lobe as the child grows. In frontal lobe lesions, the inhibitory effect of the frontal lobe is released → appearance of palmomental reflex.