Palmomental reflex

A stimulus to the thenar area of the hand causes a reflex contraction ipsilaterally of the orbicularis oris and mentalis muscles.

Incidence from neonatal period to age 20 ranges between 3.3-20%.

After the age of 20 years the incidence increases approximately 10% per decade.

Symmetrical reflex can be found in individuals with no neurological or mental disease process and is not considered a pathological sign.

Asymmetrical reflex is considered a significant neurological finding of the central or peripheral nervous system.

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