Corpus: Depressor labii inferioris muscle: Unterschied zwischen den Versionen
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==Definition== | ==Definition== | ||
The '''depressor labii inferioris muscle''' | The '''depressor labii inferioris muscle''' is part of the deeper layer of the [[Corpus:Facial muscles|facial muscles]] that control facial expressions around the [[Corpus:Mouth|mouth]]. Its primary function is to pull the lower lip downward.<dcembed ratio="16x9"><dcEmbedUrl src="https://www.doccheck.com/de/detail/photos/42955-musculus-depressor-labii-inferioris"></dcEmbedUrl></dcembed> | ||
==Course== | ==Course== | ||
The depressor labii inferioris muscle originates | The depressor labii inferioris muscle originates from the lower edge of the [[Corpus:Mandible|mandible]], specifically at the oblique line between the [[Corpus:Symphysis|symphysis]] and the [[Corpus:Mental foramen|mental foramen]]. It continues the fiber direction of the [[Corpus:Platysma muscle|platysma muscle]]. The muscle fibers run steeply upward and inward towards the lower lip, where they insert into the skin. Some fibers also blend with those of the [[Corpus:Orbicularis oris muscle|orbicularis oris muscle]]. | ||
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==Innervation== | ==Innervation== | ||
This muscle is innervated by the marginal mandibular branch of the [[Corpus:Facial nerve|facial nerve]] (cranial nerve VII). | |||
==Function== | ==Function== | ||
The depressor labii inferioris muscle pulls the lower lip | The depressor labii inferioris muscle pulls the lower lip downward, helping to express emotions such as sadness or disappointment. The muscle is fused with the skin, causing the skin to move with the muscle. Together with the [[Corpus:Depressor anguli oris muscle|depressor anguli oris muscle]], it contributes to the expression commonly referred to as a "pout." | ||
<dcembed ratio="16x9"><dcembedurl src="https://www.doccheck.com/de/detail/videos/4045-musculus-depressor-labii-inferioris"></dcembedurl></dcembed> | <dcembed ratio="16x9"><dcembedurl src="https://www.doccheck.com/de/detail/videos/4045-musculus-depressor-labii-inferioris"></dcembedurl></dcembed> | ||
Version vom 1. August 2024, 19:20 Uhr
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This text has been translated by an AI and may sound raw. It will be reviewed shortly. Thank you for your patience!
from Latin: deprimere - to press down; labium - lip; inferior - lower(r)
Synonym: Musculus quadratus menti
Definition
The depressor labii inferioris muscle is part of the deeper layer of the facial muscles that control facial expressions around the mouth. Its primary function is to pull the lower lip downward.
Course
The depressor labii inferioris muscle originates from the lower edge of the mandible, specifically at the oblique line between the symphysis and the mental foramen. It continues the fiber direction of the platysma muscle. The muscle fibers run steeply upward and inward towards the lower lip, where they insert into the skin. Some fibers also blend with those of the orbicularis oris muscle.
Innervation
This muscle is innervated by the marginal mandibular branch of the facial nerve (cranial nerve VII).
Function
The depressor labii inferioris muscle pulls the lower lip downward, helping to express emotions such as sadness or disappointment. The muscle is fused with the skin, causing the skin to move with the muscle. Together with the depressor anguli oris muscle, it contributes to the expression commonly referred to as a "pout."