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An inability to form facial expressions on one side of the face may be the first sign of damage to the nerve of these muscles. Damage to the facial nerve results in facial paralysis of the muscles of facial expression on the involved side. Paralysis is the loss of voluntary muscle action; the facial nerve has become damaged permanently or ...
If facial paralysis is caused by trauma or tumour surgery, direct reinnervation of the facial muscles (ideally within 72 hours after facial nerve damage) can be achieved by neurorrhaphy, with or without an interposition nerve graft. (Algorithm 1) [7] Neurorrhaphy is a primary end-to-end reconnection of the facial nerve stumps. [8]
There are three main patterns of facial nerve compression. The type of injury also gives an idea about the prognosis. Neuropraxia: no wallerian degeneration and complete and rapid recovery of function. Axonotmesis: wallerian degeneration and necrosis of the distal segment (death of the part of the nerve after the compression). Recovery is not ...
It passes anterior-ward deep to the platysma and depressor anguli oris muscles. It provides motor innervation to muscles of the lower lip and chin: the depressor labii inferioris muscle, depressor anguli oris muscle, and mentalis muscle. [1] It communicates with the mental branch of the inferior alveolar nerve. [citation needed]
Rarely, facial nerve damage or temporary numbness or tingling can occur," adds Bassiri-Tehrani. "Additionally, results can be inconsistent, with some patients experiencing minimal improvement ...
Denervation may be the result of nerve injury. The three main types of nerve injury are neurapraxia, axonotmesis and neurotmesis. These three types distinguish between the severity of the nerve damage and the potential for recovery after the damage. After an injury in which some nerves are damaged, the brain has shown capabilities in rewiring ...
The nerve is then tested by sticking the tongue out. If there is damage to the nerve or its pathways, the tongue will usually but not always deviate to one side, due to the genioglossus muscle receiving nerve signals on one side but not the other. [6] [19] When the nerve is damaged, the tongue may feel "thick," "heavy," or "clumsy."
The facial nerve, also known as the seventh cranial nerve, cranial nerve VII, or simply CN VII, is a cranial nerve that emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.