Facial nerve nucleus | definition of Facial nerve nucleus by Medical dictionary
facial motor nucleus (redirected from Facial nerve nucleus)
a group of motor neurons located in the anterolateral region of the lower pontine tegmentum and innervating the muscles of facial expression, the stapedius muscle in the middle ear, the posterior belly of the musculus digastricus, and the stylohyoid muscle.
facial motor nucleus
A nucleus of the branchial motor column in the pontine region of the hindbrain. This nucleus is a column of cholinergic neurons in the ventrolateral tegmentum. It is the origin of motor axons in the facial nerve (CN VII), which innervate the muscles of facial expression.
References in periodicals archive
Eight-and-a-half syndrome results from involvement of the dorsal tegmen of the caudal pons involving the parapontine reticular formation or abducens nucleus and medial longitudinal fasciculus as well as the facial nerve nucleus
. Symptoms of eight-and-a-half syndrome include intranuclear opthalmoplegia plus horizontal gaze palsy and ipsilateral facial paresis .
The facial nerve nucleus can be activated in following two ways:
When the organism is emotionally aroused there is activity in the hypothalamus and the limbic system in the lower brain, which influences the facial nerve nucleus via the extrapyramidal tract.