Mental nerve

Mental nerve
Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion. (Mental nerve visible at bottom right, at chin.)
Sensory areas of the head, showing the general distribution of the three divisions of the fifth nerve. (Mental nerve labeled at bottom left, near chin, in yellow.)
Details
Latin	nervus mentalis
From	inferior alveolar nerve
Innervates	chin, lower lip
Identifiers
Dorlands /Elsevier	n_05/12566174
TA
TH	{{#property:P1694}}
TE	{{#property:P1693}}
FMA	{{#property:P1402}}
Anatomical terms of neuroanatomy [[[d:|edit on Wikidata]]]

Mental nerve is a general somatic afferent (sensory) nerve which provides sensation to the anterior aspects of the chin and lower lip as well as the buccal gingivae of the mandibular anterior teeth and the premolars. It is a branch of the posterior trunk of the inferior alveolar nerve, which is itself a branch of the mandibular division of the trigeminal nerve (CN V).

The nerve emerges at the mental foramen in the mandibula, and divides beneath the Depressor anguli oris muscle into three branches:

• one descends to the skin of the chin.
• two ascend to the skin and mucous membrane of the lower lip.

These branches communicate freely with the facial nerve.

Anesthesia

The mental nerve can be blocked with local anesthesia, a procedure used in surgery of the chin, lower lip and buccal mucosa from midline to the second premolar. In this technique, local anesthetic is infiltrated in the soft tissue surrounding the mental foramen.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

• Anatomy photo:23:st-0610 at the SUNY Downstate Medical Center - "Anatomy of the Superficial Face - Nerves"
• MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb3.htm
• cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (V)

Additional images

Mandible of human embryo 24 mm. long. Outer aspect.

Mandibular division of the trifacial nerve.

The nerves of the scalp, face, and side of neck.

Outline of side of face, showing chief surface markings.