Loading AI tools
Small pyramidal slip of muscle deep to the superior orbital nerve, artery and vein From Wikipedia, the free encyclopedia
The procerus muscle (or pyramidalis nasi) is a small pyramidal slip of muscle deep to the superior orbital nerve, artery and vein. Procerus is Latin, meaning tall or extended.
| Procerus muscle | |
|---|---|
Muscles of the head, face, and neck. (Procerus visible at upper left, at top of nose.) | |
| Details | |
| Origin | From fascia over the lower part of the nasal bone |
| Insertion | Into the skin of the lower part of the forehead between the eyebrows |
| Artery | Facial artery |
| Nerve | Temporal branch of the facial nerve |
| Actions | Draws down the medial angle of the eyebrow giving expressions of frowning |
| Identifiers | |
| Latin | musculus procerus, pyramidalis nasi, depressor glabellae |
| TA98 | A04.1.03.008 |
| TA2 | 2061 |
| FMA | 46769 |
| Anatomical terms of muscle | |
The procerus muscle arises by tendinous fibers from the fascia covering the lower part of the nasal bone and upper part of the lateral nasal cartilage. It is inserted into the skin over the lower part of the forehead between the two eyebrows on either side of the midline, its fibers merging with those of the frontalis muscle.[1]
The procerus muscle is supplied by the temporal branch of the facial nerve (VII).[2] It may also be supplied by other branches of the facial nerve, which can be varied,[2] including the lower zygomatic branches. A supply from its buccal branch has also been described.[3] Its contraction can produce transverse wrinkles.
The procerus muscle helps to pull that part of the skin between the eyebrows downwards, which assists in flaring the nostrils. It can also contribute to an expression of anger.
Dystonia of the procerus muscle is involved in the procerus sign, which is indicative of progressive supranuclear palsy (PSP).[4]
The procerus muscle may be denervated to reduce furrow lines around the glabella caused by frowning.[2] This may be for cosmetic purposes. Surgery can be used to transect the temporal branch of the facial nerve, although other branches of the facial nerve may also need to be cut.[2]
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
