Biomaterial Database

Acute Unilateral Masseter Muscle Paralysis Caused by Pontine Infarction. 2021

Chonghwee Lee, and Taewon Kim

Department of Neurology, College of Medicine, The Catholic University of Korea, Seoul, South Korea.

In the present report, we discussed the case of a 57-year-old man with unilateral masticatory muscle weakness, nystagmus, skew deviation and facial hypesthesia due to pontine tegmental infarction. Trigeminal motor neuropathy attributed to brain infarction is very rare. Brain magnetic resonance imaging revealed a small dot-like infarction lesion in the pontine tegmentum. Masticatory muscle weakness was confirmed by an electrophysiological study performed on the day after admission in which there was an incomplete interference pattern without spontaneous denervation activity, suggesting that the patient's masseter muscle weakness was caused by an infarction of the trigeminal motor nucleus proper or trigeminal motor nerve fascicles rather than Wallerian degeneration of the trigeminal nerve or the progression of masseter muscle degeneration.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008406	Masseter Muscle	A masticatory muscle whose action is closing the jaws.	Masseter Muscles,Muscle, Masseter,Muscles, Masseter
D008409	Mastication	The act and process of chewing and grinding food in the mouth.	Chewing
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D005158	Facial Paralysis	Severe or complete loss of facial muscle motor function. This condition may result from central or peripheral lesions. Damage to CNS motor pathways from the cerebral cortex to the facial nuclei in the pons leads to facial weakness that generally spares the forehead muscles. FACIAL NERVE DISEASES generally results in generalized hemifacial weakness. NEUROMUSCULAR JUNCTION DISEASES and MUSCULAR DISEASES may also cause facial paralysis or paresis.	Facial Palsy,Hemifacial Paralysis,Facial Palsy, Lower Motor Neuron,Facial Palsy, Upper Motor Neuron,Facial Paralysis, Central,Facial Paralysis, Peripheral,Facial Paresis,Lower Motor Neuron Facial Palsy,Upper Motor Neuron Facial Palsy,Central Facial Paralyses,Central Facial Paralysis,Facial Palsies,Facial Paralyses, Central,Facial Paralyses, Peripheral,Palsies, Facial,Palsy, Facial,Paralyses, Central Facial,Paralyses, Facial,Paralyses, Hemifacial,Paralysis, Central Facial,Paralysis, Facial,Paralysis, Hemifacial,Paralysis, Peripheral Facial,Pareses, Facial,Paresis, Facial,Peripheral Facial Paralysis
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000208	Acute Disease	Disease having a short and relatively severe course.	Acute Diseases,Disease, Acute,Diseases, Acute
D018908	Muscle Weakness	A vague complaint of debility, fatigue, or exhaustion attributable to weakness of various muscles. The weakness can be characterized as subacute or chronic, often progressive, and is a manifestation of many muscle and neuromuscular diseases. (From Wyngaarden et al., Cecil Textbook of Medicine, 19th ed, p2251)	Muscular Weakness,Muscle Weaknesses,Muscular Weaknesses,Weakness, Muscle,Weakness, Muscular,Weaknesses, Muscle,Weaknesses, Muscular
D020433	Trigeminal Nerve Diseases	Diseases of the trigeminal nerve or its nuclei, which are located in the pons and medulla. The nerve is composed of three divisions: ophthalmic, maxillary, and mandibular, which provide sensory innervation to structures of the face, sinuses, and portions of the cranial vault. The mandibular nerve also innervates muscles of mastication. Clinical features include loss of facial and intra-oral sensation and weakness of jaw closure. Common conditions affecting the nerve include brain stem ischemia, INFRATENTORIAL NEOPLASMS, and TRIGEMINAL NEURALGIA.	Cranial Nerve V Diseases,Fifth Cranial Nerve Diseases,Raeder Paratrigeminal Syndrome,Trigeminal Nerve Disorders,Trigeminal Neuropathy,Trigeminal Neuropathy, Idiopathic,Idiopathic Trigeminal Neuropathies,Idiopathic Trigeminal Neuropathy,Neuropathies, Idiopathic Trigeminal,Neuropathies, Trigeminal,Neuropathy, Idiopathic Trigeminal,Neuropathy, Trigeminal,Syndrome, Raeder Paratrigeminal,Trigeminal Nerve Disease,Trigeminal Nerve Disorder,Trigeminal Neuropathies,Trigeminal Neuropathies, Idiopathic
D020526	Brain Stem Infarctions	Infarctions that occur in the BRAIN STEM which is comprised of the MIDBRAIN; PONS; and MEDULLA OBLONGATA. There are several named syndromes characterized by their distinctive clinical manifestations and specific sites of ischemic injury.	Benedict Syndrome,Brain Stem Infarct,Claude Syndrome,Foville Syndrome,Millard-Gublar Syndrome,Top of the Basilar Syndrome,Weber Syndrome,Brainstem Infarctions,Brainstem Stroke,Infarctions, Brain Stem,Infarctions, Brainstem,Brain Stem Infarction,Brain Stem Infarcts,Brainstem Infarction,Infarct, Brain Stem,Infarction, Brain Stem,Infarction, Brainstem,Infarcts, Brain Stem,Millard Gublar Syndrome,Stem Infarct, Brain,Stem Infarcts, Brain,Stroke, Brainstem,Syndrome, Millard-Gublar