When we consider muscle groups impacted by stress, it is no wonder that facial myoclonus at the lower lip level may result. Psychosomatic Causes with Physiologic BasisĬontinuous or episodic stress activates our autonomous nervous system, our internal chemical balance mechanism, and other compensation systems at both a cellular and a systems level.( 9) Certain central events like seizures may affect those face muscles as well.Įven general well-being concerns like anxiety, relationship issues, problems with finances or work setting, etc.
The facial nerve innervation may affect the whole face with twitching in such event, inducing lip and eye spasms. The VIIth nerve as it leaves the brainstem may be impacted by circulation problems, causing the twitch of the bottom lip. Stressing muscles with overuse or pushing them to the point of fatigue may induce spasm. Neurosurgeon Ravish Patwardhan notes that twitching lips are far from uncommon.( 8) The twitch may relate to muscle abuse, damage, fatigue, or circulation anomaly near the muscle or deep within the central nervous system. Our brief anatomy discussion reveals that a lower lip twitch relates to myoclonus within the depressor labii inferioris, the mentalis, the platysma, or within some combination of the three.Īlternatively, the source of the twitch may reside within the muscle’s innervation.Ī Differential Approach to Identify Cause Why Is Your Bottom Lip Twitching? Locus of the Lower Lip Twitch The “sheet muscle,” the platysma, connects the neck with the mandible, allowing us to depress our lower lip.( 7) The mentalis connects the mandible to the chin, allowing the raising of the lower lip, giving us the ability to pout. The depressor labii inferioris links the mandible to the dermis and orbicularis in a fan shape, allowing the lower lip to move in and laterally.
There are 12 lip muscles with three serving the lower lips alone, the “depressor labii inferioris,” the “mentalis,” and the “platysma.” The sensory component of the lower lip connects to the trigeminal’s mandibular branch and travels through the mental foramen to the brainstem.( 6) The motor nerves serving the lips come from “cranial nerve VII,” the “facial nerve.” They arise from the mandibular branch of the nerve. The “buccinator,” “levator anguli oris,” and “mentalis”-deeper musculature elements-are served by cranial nerve V, the “trigeminal.” ( 5) The nerves innervate muscles and verify what is happening via afferent feedback. The nervous system consists of efferent nerves from the brain and afferent nerves to the brain. The nervous system’s “subdermal plexus” receives its blood supply from both the facial and labial arteries.( 4) The upper and lower lips receive blood supply via the “external carotid’s” “ facial artery.” It proceeds from the neck, supplying the “inferior and superior labial artery” lying beneath the orbicularis oris. “Salivary glands,” “sebaceous glands,” and various hair cells reside within these lip tissues.( 3) The vermilion is nurtured via capillaries. The “ orbicularis oris” is the muscle of both the upper and lower lips, nurtured by the “superior and inferior labial arteries.” These surface structures cover the musculature of the lips.
Lip quiver meaning skin#
The lower lip is recognized by its vermilion edge as well, but the only definition to the lower lip is the “ mentolabial sulcus,” a slight depression of chin skin below the vermilion.( 2) The vermilion is the connecting tissue linking our exterior skin to the interior mucosa and the moisture of the mouth. These structures connect to our “lips,” the “vermilion” where lipstick or lip balm is applied. The upper lip has flesh (the “pillars”) that rises above the other lip tissue (the “philtrum”).
Our discussion here focuses on the significance of lower lip myoclonus.Ī casual look at the face reveals several surface structures that comprise our lips. This condition is called “ myoclonus,” not a disease per se, but a possible disease indicator.( 1) Although discomfort may be present, it may be invisible to others.
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