What muscles does the marginal mandibular nerve innervate?
The marginal mandibular branch of the facial nerve is responsible for the motor function of the depressor anguli oris, the depressor labii inferioris, the inferior fibers of the orbicularis oris and the mentalis muscles (2-4).
Which muscles are supplied by mandibular nerve?
The mandibular nerve supplies the teeth and gums of the mandible, the skin of the temporal region, part of the auricle, the lower lip, and the lower part of the face (see Figure 4-2, V3). The mandibular nerve also supplies the muscles of mastication and the mucous membrane of the anterior two-thirds of the tongue.
Where is the marginal mandibular nerve located?
[2,3] The marginal mandibular nerve runs forward below the angle of the mandible under the platysma, at first superficial to the upper part of the digastric triangle and then turning up and forward across the body of the mandible to supply muscles of the lower lip.
What is marginal mandibular nerve?
Marginal mandibular nerve is a terminal branch of the extracranial part of the facial nerve and leaves the parotid from its antero-inferior border and travels beneath the platysma muscle and deep cervical neck fascia, after which its course becomes superficial to the facial vessels.
Is marginal mandibular nerve deep to Platysma?
The marginal mandibular branch of the facial nerve travels deep to the platysma and superficial to the facial vein. It may be located up to 2 cm below the inferior border of the mandible posterior to the anterior border of the masseter.
What are the symptoms of lingual nerve damage?
If your lingual nerve sustains an injury, you’ll most likely experience any of these nerve damage symptoms:
- Changed sensation in the tongue, chin, or lower lip areas (similar to sensations you feel when your oral cavity is numbed for a dental procedure or as the anesthesia slowly wears off)
- Altered ability to taste.
How deep is the marginal mandibular nerve?
The marginal mandibular branch of the facial nerve travels deep to the platysma and superficial to the facial vein. It may be located up to 2 cm below the inferior border of the mandible posterior to the anterior border of the masseter. Anterior to this point, the nerve is found superior to the inferior border.
How do you fix nerve damage in gums?
The two most common dental procedures for dealing with tooth nerve damage are fillings and root canals.
- Filling: A filling is the most common form of dental repair.
- Root Canal: This is a more intense type of dental procedure that is utilized when pain develops as a result of a severely decayed or damaged tooth.
How long does it take for lingual nerve damage to heal?
Injury to the lingual nerve may also affect taste perception on the affected side of the tongue. The vast majority (approximately 90%) of these injuries are temporary in nature and resolve within eight weeks. However, if the injury persists beyond six months it is deemed to be permanent.
Where is the marginal mandibular nerve located in the body?
The marginal mandibular nerve is one of the major branches which is anatomically situated at a very vulnerable position. During its passage beneath the Platysma muscle and Depressor Anguli Oris, it supplies the muscles of lower lip and the chin and ends by communicating with the inferior alveolar nerve.
What is the injury rate of the marginal mandibular branch?
The marginal mandibular branch was reported to have an injury rate of 1.58% (95% CI, 0.82–2.54). The percentage of permanent injury was not mentioned. Other possible injuries are injury to the ascending sympathetic fibers causing Horner syndrome, the hypoglossal nerve, the glossopharyngeal nerve, and the spinal accessory nerve.
What happens to the mandibular branch of the facial nerve?
Note that, since the platysma muscle contributes to the downward movement of the lower lip, any anterolateral incision going through platysma will cause some degree of lip motion impairment. The approach to the preservation of this nerve varies depending on the presence or suspicion of pathologic lymph nodes along the external facial vein.
What does mnemonic for mandibular nerve stand for?
To remember the muscles innervated by the motor fibers of the mandibular nerve, you can use the following mnemonic: “My Anus Temporarily Meets the Toilet”, which stands for;