This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Palmomental reflex is seen in lesions of – 
Select and explain. 
A. Frontal lobe, B. Parietal lobe, C. Temporal lobe, D. Occipital lobe
A: Frontal lobe
Answer: A: Frontal lobe 
Explanation: 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.