Inferior alveolar nerve.
This is a terminal branch of
the inferior alveolar nerve which springs from that nerve at the mental foramen.
It emerges under the depressor anguli oris and divides into three terminal
branches. They are cutaneous branches to the skin of the chin.
ROOT: Sensory root is from the sensory nuclei extending
from the spinal nucleus of trigeminal from the substantia gelatinosa of the
upper cervical region to the medulla, and the pontine nucleus which lies in the
floor of the 4th ventricle. This extends to the midbrain mesencephalic nucleus