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Encyclopedia > Frontalis muscle
Frontalis
Visible at top left
Latin venter frontalis musculi occipitofrontalis
Gray's subject #105 379
Origin: galea aponeurosis
Insertion: Mastoid process
Artery: ophthalmic artery
Nerve: facial nerve
Action: wrinkles brow
Dorlands/Elsevier m_22/12549942

The Frontalis is thin, of a quadrilateral form, and intimately adherent to the superficial fascia. It is broader than the Occipitalis and its fibers are longer and paler in color. Image File history File links No higher resolution available. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... A typical adult human skeleton consists of the following 206 bones, though this number does vary owing to a variety of anatomical variations; for example, a small portion of the human population have an extra rib, or an extra lumbar vertebra. ... The galea aponeurotica (epicranial aponeurosis) covers the upper part of the cranium; behind, it is attached, in the interval between its union with the Occipitales, to the external occipital protuberance and highest nuchal lines of the occipital bone; in front, it forms a short and narrow prolongation between its union... A typical adult human skeleton consists of the following 206 bones, though this number does vary owing to a variety of anatomical variations; for example, a small portion of the human population have an extra rib, or an extra lumbar vertebra. ... The mastoid process (or mastoid bone) is a conical bump of the posterior portion of the temporal bone that is situated behind the ear in humans and many other vertebrates and serves as a site of neck muscle attachment (the Sternocleidomastoid, Splenius capitis, and Longissimus capitis). ... Section of an artery For other uses, see Artery (disambiguation). ... The opthalmic artery is a branch of the internal carotid artery which supplies branches to supply the eye and other structures in the orbit: Central retinal artery Supraorbital artery Supratrochlear artery Lacrimal artery Dorsal nasal artery Short posterior ciliary arteries Long posterior ciliary arteries Posterior ethmoidal artery Anterior ethmoidal artery... List of human nerves External links List of nerves This is an incomplete list, which may never be able to satisfy certain standards for completeness. ... The facial nerve is seventh of twelve paired cranial nerves. ... Kinesiology is the scientific study of human movement. ... Elseviers logo. ... Fascia, pronounced , is specialized connective tissue layer which surrounds muscles, bones, and joints, providing support, protection and giving structure to the body. ... The Occipitalis muscle is a muscle of the human body. ...


It has no bony attachments.


Its medial fibers are continuous with those of the Procerus; its immediate fibers blend with the Corrugator and Orbicularis oculi; and its lateral fibers are also blended with the latter muscle over the zygomatic process of the frontal bone. The Procerus is a small pyramidal slip of muscle deep to the superior orbital nerve, artery and vein. ... Corrugator (from Latin for wrinkle) can mean: Corrugator supercilii muscle Corrugator cutis ani muscle A piece of machinery used to manufacture corrugated sheets used in Corrugated fiberboard boxes Category: ... The Orbicularis oculi is a muscle of the human body. ... The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. ... The frontal bone (os frontale, TA: A02. ...


From these attachments the fibers are directed upward, and join the galea aponeurotica below the coronal suture. The Galea aponeurotica is connective tissue at the back of the head. ... The coronal suture (sutura coronalis) is a dense, fibrous connective tissue joint that separates the frontal and parietal bones of the skull. ...


The medial margins of the Frontales are joined together for some distance above the root of the nose; but between the Occipitales there is a considerable, though variable, interval, occupied by the galea aponeurotica. For the article about nose in humans, see human nose. ... The Galea aponeurotica is connective tissue at the back of the head. ...


It is considered by some sources not to be a muscle of its own, but to be a part of the occipitofrontalis muscle. The Occipitofrontalis is a term used by some to describe a muscle of the human body, with two parts: the occipital part/belly, and the frontal part/belly. ...


Clinical significance

On neurological examination the frontalis muscle is helpful in determining whether a facial nerve abnormality is an upper or lower motor neurone lesion.

  • In an upper motor neurone facial nerve abnormality, the frontalis is usually spared, so the patient is able to raise his or her eyebrows normally.
  • In a lower motor neurone facial nerve abnormality, there will be unilateral weakness of one side of the frontalis muscle.

This is because frontalis has bilateral cortical representation. Upper motor neurons are any neurons that carry motor information down to the final common pathway, that is, any neurons that are not directly responsible for stimulating the target muscle. ... Lower motor neurons are the motoneurons connecting the spinal cord to the muscle fibers, bringing the nerve impulses from the upper motor neurons out the spine to the muscles. ...


Additional images

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. A garden sign welcomes residents and visitors to Rogers Park as home of Loyola University Chicago. ... eMedicine is an online clinical medical knowledge base that was founded in 1996. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ...


  Results from FactBites:
 
Motrische cortex (972 words)
The frontalis muscle runs vertically on the forehead, originating in tissues of the scalp (galea aponeurotica) above the hairline and inserting into the skin in the forehead and near the eyebrows.
Frontalis is innervated by temporal branches of the facial nerve (VII) and is supplied with blood by the superficial temporal artery.
Orbicularis oculi is a sphincter muscle around the eye and acts, in general, to narrow the eye opening and close the orbit of the eye.
  More results at FactBites »


 

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