What is marginal mandibular nerve?
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.
What does the marginal mandibular branch of facial nerve do?
Anatomical terms of neuroanatomy The marginal mandibular branch of the facial nerve passes forward beneath the platysma and depressor anguli oris, supplying the muscles of the lower lip and chin, and communicating with the mental branch of the inferior alveolar nerve.
How do you find the marginal mandibular nerve?
The marginal mandibular nerve is shown as it exits the anterior border of the parotid gland. The nerve courses anteriorly over the facial artery and vein at the inferior border of the mandible. A Kirschner wire is placed at the masseteric tuberosity.
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 can you prevent injury to the marginal mandibular nerve?
When below the angle and body of the mandible, its maximum distance was found to be 1.6 and 1.4 cm, respectively. Therefore, in order to avoid damage to the marginal mandibular branch of the facial nerve, the submandibular incision should be planned 1.6 cm or more below the lower border and angle of the mandible.
How many branches of marginal mandibular nerve are there?
The marginal mandibular branch of the facial nerve (MMB) emerges from the lower part of the anterior border of the parotid gland and divides into three main branches upper, middle and lower branches (a, b and c), respectively. The (a) branch communicates with the (AB) branch of (GAN) superficial to masster (M) muscle.
How many main branches of the mandibular facial nerve are there?
three main branches
The Mandibular Nerve (V3) On its extracranial course, it divides into three main branches: the buccal, mental, and auriculotemporal nerves.
Is the mandibular nerve sensory or motor?
The mandibular division of the trigeminal nerve, also referred to as the mandibular nerve, is a mixed sensory and branchial motor nerve. It is also the largest of the three branches of the trigeminal nerve. The sensory root arises from the lateral aspect of the ganglion, with the motor division lying deeper.
What is the largest branch of the mandibular nerve?
the trigeminal nerve
The mandibular nerve (V3) is the largest of the three divisions of the trigeminal nerve, the fifth cranial nerve (CN V)….
|Anatomical terms of neuroanatomy|
What happens if mandibular nerve is damaged?
Injury to these two branches of the mandibular division of the trigeminal nerve may result in altered sensation associated with the ipsilateral lower lip or tongue or both and may include anaesthesia, paraesthesia, dysaesthesia, hyperalgesia, allodynia, hypoaesthesia and hyperaesthesia.
What does the mandibular nerve affect?
The mandibular nerve supplies both motor and sensory information, which means it’s linked to movement and senses. One of its most essential functions is controlling the movements of the muscles that allow you to chew. These include the masseter, the lateral and medial pterygoids, and the temporalis muscle.
How long does it take for mandibular nerve to heal?
In most cases, complete recovery occurs 6 to 8 weeks after the trauma, although it may take up to 24 months.
What happens to the marginal mandibular nerve during a neck dissection?
The marginal mandibular branch of facial nerve can also be damaged during a neck dissection. It can occasionally be injured during other cervical surgeries, parotidectomies, mandibular fracture reductions, rhytidoplasty and many other surgeries along the mandibular and neck region.
What happens if you injure the mandibular nerve during surgery?
It can occasionally be injured during other cervical surgeries, parotidectomies, mandibular fracture reductions, rhytidoplasty and many other surgeries along the mandibular and neck region. The injury to this nerve represents as a severe defect of opening of the mouth, distortion in smiling and grimace.
How long does it take to recover from marginal mandibular nerve weakness?
The injury treated by the complex forms of surgical interventions takes six to eight weeks for the improvement of functions. By that time the patients can squeeze the improvement time by using a few simple techniques. The following video shares the techniques and treatment options for the marginal mandibular nerve weakness:
What is the relationship between the mandible and the facial nerve?
Its relationship with the angle and inferior border of the mandible, with facial artery, with (anterior) facial vein and other surrounding structures was recorded. Its peripheral anastomoses with other branches of the facial nerve of the same and the opposite side were observed.