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1–4 per 10,000 per year [ 2] Bell's palsy is a type of facial paralysis that results in a temporary inability to control the facial muscles on the affected side of the face. [ 1] In most cases, the weakness is temporary and significantly improves over weeks. [ 4] Symptoms can vary from mild to severe. [ 1]
Facial nerve paralysis is a common problem that involves the paralysis of any structures innervated by the facial nerve. The pathway of the facial nerve is long and relatively convoluted, so there are a number of causes that may result in facial nerve paralysis. [ 2] The most common is Bell's palsy, [ 3][ 4] a disease of unknown cause that may ...
Facial synkinesis is a common sequela to Idiopathic Facial Nerve Paralysis, also called Bell's Palsy or Facial Palsy. [2] Bell's Palsy, which is thought to occur due to a viral reactivation which can lead (through unknown mechanisms) to diffuse axon demyelination and degeneration of the seventh cranial nerve, results in a hemifacial paralysis due to non-functionality of the nerve.
The facial nerve is a mixed nerve (i.e. containing both sensory and motor nerve fibres) and therefore compression can create sensory (e.g. anesthesia - numbness, or paresthesia - tingling) and motor deficits. Early surgical intervention tends to be carried out because after three to four months, fibrosis (replacement with fibrous tissue) occurs ...
Median nerve palsy. Diagram from Gray's anatomy, depicting the nerves of the upper extremity, amongst others the median nerve. Injuries to the arm, forearm or wrist area can lead to various nerve disorders. One such disorder is median nerve palsy. The median nerve controls the majority of the muscles in the forearm.
Bell's phenomenon. Bell's phenomenon (also known as the palpebral oculogyric reflex [1]) is a medical sign that allows observers to notice an upward and outward movement of the eye, when an attempt is made to close the eyes. The upward movement of the eye is present in the majority of the population, and is a defensive mechanism. [2]
Central facial palsy (colloquially referred to as central seven) is a symptom or finding characterized by paralysis or paresis of the lower half of one side of the face. It usually results from damage to upper motor neurons of the facial nerve . The facial motor nucleus has dorsal and ventral divisions that contain lower motor neurons supplying ...
The House–Brackmann score is a score to grade the degree of nerve damage in a facial nerve palsy. The measurement is determined by measuring the upwards (superior) movement of the mid-portion of the top of the eyebrow, and the outwards (lateral) movement of the angle of the mouth. Each reference point scores 1 point for each 0.25 cm movement ...