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The mylohyoid nerve (or nerve to mylohyoid) is a mixed nerve of the head. It is a branch of the inferior alveolar nerve . It provides motor innervation the mylohyoid muscle , and the anterior belly of the digastric muscle .
Accessory mylohyoid muscles have been seen in some people, which have the same attachments, nerve supply, and function. [6] The mylohyoid muscle may also be split into an anterior portion and a posterior portion, with the sublingual gland occupying the space between these portions. [7] An area of herniation of the sublingual gland, blood ...
The mylohyoid line is a bony ridge on the internal surface of the body of the mandible. The mylohyoid line extends posterosuperiorly. The mylohyoid line continues as the mylohyoid groove on the internal surface of the ramus. The mylohyoid muscle originates from the anterior (front) part of the mylohyoid line. [1]
Primary injury occurs at the moment of trauma and includes contusion, damage to blood vessels, and axonal shearing, in which the axons of neurons are stretched and torn. [1] The blood brain barrier and meninges may be damaged in the primary injury, and neurons may die. [7] Cells are killed in a nonspecific manner in primary injury. [8]
Conversely, a lower motor neuron lesion affects nerve fibers traveling from the anterior horn of the spinal cord or the cranial motor nuclei to the relevant muscle(s). [ 1 ] Upper motor neuron lesions occur in the brain or the spinal cord as the result of stroke , multiple sclerosis , traumatic brain injury , cerebral palsy , atypical ...
Multiple sclerosis (MS) is a chronic disease of the nervous system that can lead to muscle weakness, vision loss, and paralysis. It occurs when the immune system attacks the myelin sheath that ...
Repetitive shoulder movements, overhead, swinging, throwing or circling movement can cause musculoskeletal injury. [16] Some cases can result in spinal cord damage at the C3-C5 levels, producing a myelopathy which can dramatically compromise overall movements in arm and legs as well as other fine motor functions. [1]
Thus the facial artery can be used as an important landmark in locating the marginal mandibular nerve during surgical procedures. [2] Damage can cause paralysis of the three muscles it supplies, which can cause an asymmetrical smile due to lack of contraction of the depressor labii inferioris muscle. [3]