NationMaster - Encyclopedia: Orbicularis oculi muscle

The orbicularis oculi arises from the nasal part of the frontal bone, from the frontal process of the maxilla in front of the bickybicky WUT werd, and from the anterior surface and borders of a short fibrous band, the medial palpebral ligament. Image File history File links Gray379. ... 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 frontal bone (os frontale, TA: A02. ... The medial palpebral ligament (tendo oculi), about 4 mm. ... The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ... 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 lateral palpebral raphÃ© is a much weaker structure than the medial palpebral ligament. ... 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... The middle temporal artery occasionally gives off a zygomaticoÃ¶rbital branch, which runs along the upper border of the zygomatic arch, between the two layers of the temporal fascia, to the lateral angle of the orbit. ... The Angular Artery is the terminal part of the external maxillary; it ascends to the medial angle of the orbit, imbedded in the fibers of the angular head of the Quadratus labii superioris, and accompanied by the angular vein. ... 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. ... An antagonist is a kind of muscle that acts in opposition to the movement generated by the agonist and is responsible for returning a limb to its initial position. ... The levator palpebrae superioris muscle is a muscle in the orbit that elevates the superior (upper) eyelid. ... Elseviers logo. ... The frontal bone (os frontale, TA: A02. ... The maxillae are the largest bones of the face, except for the mandible, and form, by their union, the whole of the upper jaw. ... The medial palpebral ligament (tendo oculi), about 4 mm. ...

From this origin, the fibers are directed lateralward, forming a broad and thin layer, which occupies the eyelids or palpebræ, surrounds the circumference of the orbit, and spreads over the temple, and downward on the cheek. An eyelid is a thin membrane of skin with the purpose of covering and protecting an eye. ... An eyelid is a thin fold of skin and muscle that covers and protects an eye. ...

The palpebral portion of the muscle is thin and pale; it arises from the bifurcation of the medial palpebral ligament, forms a series of concentric curves, and is inserted into the lateral palpebral raphé. The medial palpebral ligament (tendo oculi), about 4 mm. ... The lateral palpebral raphÃ© is a much weaker structure than the medial palpebral ligament. ...

The orbital portion is thicker and of a reddish color; its fibers form a complete ellipse without interruption at the lateral palpebral commissure; the upper fibers of this portion blend with the Frontalis and Corrugator. The Frontalis is a muscle of the human body. ... 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 lacrimal part (Tensor tarsi) is a small, thin muscle, about 6 mm. in breadth and 12 mm. in length, situated behind the medial palpebral ligament and lacrimal sac.

It arises from the posterior crest and adjacent part of the orbital surface of the lacrimal bone, and passing behind the lacrimal sac, divides into two slips, upper and lower, which are inserted into the superior and inferior tarsi medial to the puncta lacrimalia; occasionally it is very indistinct. The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ... The lacrimal canaliculi, one in each eyelid, commence at minute orifices, termed puncta lacrimalia (or lacrimal punctum, or lacrimal point), on the summits of the papillae lacrimales, seen on the margins of the lids at the lateral extremity of the lacus lacrimalis. ...

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The muscle acts to close the eye and is the only muscle capable of doing so. Loss of function for any reason results in an inability to close the eye, necessitating eye drops at the minimum to removal of the eye in extreme cases.

The Orbicularis oculi is the sphincter muscle of the eyelids. Look up Sphincter in Wiktionary, the free dictionary. ...

The palpebral portion acts involuntarily, closing the lids gently, as in sleep or in blinking; the orbital portion is subject to the will. For other uses, see Sleep (disambiguation). ... This article refers to the sight organ. ...

When the entire muscle is brought into action, the skin of the forehead, temple, and cheek is drawn toward the medial angle of the orbit, and the eyelids are firmly closed, as in photophobia. Photophobia (also light sensitivity) or fear of light, is a symptom of excessive sensitivity to light and the aversion to sunlight or well-lit places. ...

The skin thus drawn upon is thrown into folds, especially radiating from the lateral angle of the eyelids; these folds become permanent in old age, and form the so-called “crow's feet.” Crow Foot, Crowfoot, or Crows Foot may refer to one of the following. ...

The Levator palpebræ superioris is the direct antagonist of this muscle; it raises the upper eyelid and exposes the front of the bulb of the eye. The levator palpebrae superioris (or levator muscle of upper eyelid) is the muscle in the orbit that elevates the superior (upper) eyelid. ... An ...

Each time the eyelids are closed through the action of the Orbicularis, the medial palpebral ligament is tightened, the wall of the lacrimal sac is thus drawn lateralward and forward, so that a vacuum is made in it and the tears are sucked along the lacrimal canals into it.

The lacrimal part of the Orbicularis oculi draws the eyelids and the ends of the lacrimal canals medialward and compresses them against the surface of the globe of the eye, thus placing them in the most favorable situation for receiving the tears; it also compresses the lacrimal sac. The lacrimal sac, or tear sac, is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. ...

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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. ...

Category: Muscles of the head and neck A top-down view of skeletal muscle Muscle (from Latin musculus little mouse [1]) is contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. ... Head and neck anatomy is a specialized study of the human body quite frequently studied in depth by surgeons, dentist, and dental technicians. ... â€œHuman Headâ€ redirects here. ... The scalp is the anatomical area bordered by the face anteriorly and the neck to the sides and posteriorly. ... An eyelid is a thin fold of skin and muscle that covers and protects an eye. ... 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. ... The Occipitalis muscle is a muscle of the human body. ... The Frontalis is thin, of a quadrilateral form, and intimately adherent to the superficial fascia. ... Left obicularis oculi notice the corrugator muscle at the top The Corrugator supercilii is a small, narrow, pyramidal muscle, placed at the medial end of the eyebrow, beneath the Frontalis and Orbicularis oculi. ... The Depressor supercilii is an eye muscle of the human body. ... The extraocular muscles are the six muscles that control the movements of the eye. ... The levator palpebrae superioris muscle is a muscle in the orbit that elevates the superior (upper) eyelid. ... The superior tarsal muscle is a smooth muscle adjoining the levator palpebrae superioris muscle that helps to raise the upper eyelid. ... The superior rectus muscle is a muscle in the orbit that elevates, adducts, and rotates the eye medially. ... The inferior rectus muscle is a muscle in the orbit that depresses, adducts, and rotates the eye laterally. ... The medial rectus muscle is a muscle in the orbit that adducts the eyeball (makes it move inwards). ... The lateral rectus muscle is a muscle in the orbit that abducts the eyeball (makes it move outwards). ... The superior oblique muscle is a muscle in the orbit that causes the eye to look downwards when it is already directed medially (looking towards the nose). ... The inferior oblique muscle is a muscle in the orbit that adducts (medially rotates) and elevates the eyeball. ... A human eye Eyes are organs of vision that detect light. ... The ciliary muscle is a smooth muscle that affects zonular fibers in the eye (fibers that suspend the lens in position during accommodation), enabling changes in lens shape for light focusing. ... The iris dilator muscle (pupil dilator muscle, pupillary dilator, radial muscle of iris, radiating fibers), is a muscle of the eye. ... The Iris sphincter muscle is a muscle of the human body. ... The ear is the sense organ that detects sounds. ... The muscles of the auricula. ... The Temporoparietalis muscle is a distinct muscle above the Auricularis superior. ... The stapedius is the smallest striated muscle in the human body. ... The tensor tympani muscle arises from the auditory tube and inserts onto the handle of the malleus, damping down vibration in the ossicles and so reducing the amplitude of sounds. ... For the article about nose in humans, see human nose. ... Procerus muscle Origin/Proximal Attatchment: From fascia over the lower of the nasal bone Insertion/Distal Attatchment: Into the skin of the lower part of the forehead between the eyebrows Action/Relevance: Draws down the medial angle of the eyebrow giving expressions of frowning Innervation: Buccal branch of the facial... The Nasalis (Compressor naris) is a sphincter-like muscle of the nose whose function is to compress the nasal cartilege. ... The Dilatator naris muscle is a part of the nasalis muscle. ... The Depressor septi nasi is a muscle of the human body, in the nose. ... The levator labii superioris alaeque nasi muscle is, translated from Latin, the lifter of the upper lip and of the wing of the nose. It is the muscle with the longest name in the human body. ... Human mouth The mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water. ... The Levator anguli oris is a muscle of the human body. ... The Depressor anguli oris is a muscle of the human body. ... The Levator labii superioris is a muscle of the human body used in facial expression. ... The Depressor labii is part of a small quadrilateral muscle. ... The Zygomatic major is a muscle of the human body. ... The Zygomaticus minor is a muscle of the human body. ... The Mentalis is a muscle of the human body. ... The Buccinator is a thin quadrilateral muscle, occupying the interval between the maxilla and the mandible at the side of the face. ... The orbicularis oris is the sphincter muscle around the mouth. ... The Risorius is a muscle of the human body. ... Mastication or chewing is the process by which food is mashed and crushed by teeth. ... In human anatomy, the masseter is one of the muscles of mastication. ... The temporalis muscle is one of the muscles of mastication. ... The lateral pterygoid is a muscle of mastication with two heads. ... The medial pterygoid is a muscle of mastication with two heads. ... This article includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ... The Genioglossus is a muscle of the human body. ... The Hyoglossus is a muscle of the human body. ... The Chondroglossus is sometimes described as a part of the Hyoglossus, but is separated from it by fibers of the Genioglossus, which pass to the side of the pharynx. ... The Styloglossus, the shortest and smallest of the three styloid muscles, arises from the anterior and lateral surfaces of the styloid process, near its apex, and from the stylomandibular ligament. ... The Superior longitudinal muscle is a muscle of the human body. ... The Inferior longitudinal muscle is a muscle of the human body. ... The Transversus muscle is a muscle of the human body. ... The Verticalis muscle is a muscle of the human body. ... The soft palate, or velum, is the soft tissue comprising the back of the roof of the mouth. ... The Levator veli palatini is a muscle of the human body. ... The Tensor veli palatini muscle (or Tensor palati) is a muscle of the human body. ... The Musculus uvulÃ¦ (Azygos uvulÃ¦) arises from the posterior nasal spine of the palatine bones and from the palatine aponeurosis; it descends to be inserted into the uvula. ... The Palatoglossus is a muscle of the human body. ... The Palatopharyngeus muscle is a muscle of the human body. ... The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial, or superior, to the esophagus, larynx, and trachea. ... The Inferior pharyngeal constrictor muscle is a muscle of the human body. ... The Middle pharyngeal constrictor muscle is a muscle of the human body. ... The Superior pharyngeal constrictor muscle is a muscle of the human body. ... Grays Fig. ... The Salpingopharyngeus muscle is a muscle of the human body. ... The larynx (plural larynges), colloquially known as the voicebox, is an organ in the neck of mammals involved in protection of the trachea and sound production. ... The cricothyroid muscle attaches to the anterolateral aspect of the cricoid and the inferior cornu and lower lamina of the thyroid cartilage, tilting the thyroid forwards and lengthening the vocal cords. ... The posterior cricoarytenoid muscles allow the rima glottidis to be opened; they therefore have the opposite effect to the lateral cricoarytenoid muscles. ... The lateral cricoarytenoid muscles allow the rima glottidis to be closed, protecting the airway; they therefore have the opposite effect to the posterior cricoarytenoid muscles. ... The ArytÃ¦noideus is a single muscle, filling up the posterior concave surfaces of the arytenoid cartilages. ... The ThyreoarytÃ¦noideus (Thyroarytenoid) is a broad, thin, muscle which lies parallel with and lateral to the vocal fold, and supports the wall of the ventricle and its appendix. ...