The origin (immobile attachment during an action) ... The main retractor muscle is the levator palpebrae superioris, while orbicularis oculi is the protractor muscle. Levator palpebrae superioris ...Horner's muscle (the palpebral part of the orbicularis oculi muscle) has a fan-shaped origin in the lacrimal bone. Its muscle fibers are oriented from 160 to 210 degrees relative to the ear-eye plane and converge towards the medial palpebral commissure. Then the muscle divides into superior and inferior bundles of fibers.The orbicularis oculi and the adductor pollicis have similar sensitivities, with comparable maximum effects, and similar recovery times . On the other hand, the corrugator supercilii seems to be more resistant than the adductor pollicis and the orbicularis oculi both in terms of maximum blockade and recovery times ( table 2 and fig. 3 ).Mentalis muscle (Musculus mentalis) Mentalis is a paired conical facial muscle located in the chin. It belongs to the buccolabial muscles of facial expression, along with levator labii superioris alaeque nasi, levator labii superioris, levator anguli oris, zygomaticus major, zygomaticus minor, risorius, depressor labii inferioris, depressor anguli oris, orbicularis oris, incisivus superior and ...• orbicularis oculi • orbicularis oris • risorius • zygomaticus major • zygomaticus minor • buccinator • platysma 3. Demonstrate the actions of these muscles in your body. 4. Locate the origins and insertions of these muscles in the human skull and skeleton. 5. Study figures 11.1 and 11.2 and table 11.2. 6.Aug 6, 2018 · Origin: The origin of the frontalis muscle is the galea aponeurotica, which is a fibrous layer that covers the top of the cranium and extends from the forehead to the back base of the skull. Insertion: It inserts as right and left bellies from the skin of the eyebrow, with fibers extending down to interdigitate with orbicularis oculi and procerus. Trapezius. Location: superficial muscle of posterior neck & thorax. Origin: very broad; occipital bone, ligamentum nuchae, spines of C7-T12. Insertion: scapulae (acromion &spine) & clavicle. Action: extends head, adducts & raises scapula (superior fibers) & lowers scapula (inferior fibers) Latissimus Dorsi.Many items enjoyed by people of all abilities were originally designed to help people with disabilities. Here are some inventions you may use every day that were originally for the disabled community. Advertisement There's something called ...Procerus is a small, triangular muscle of the head that occupies the glabella, which is the region located between the eyebrows. It belongs to the nasal group of facial muscles, together with nasalis, levator nasolabialis and depressor septi nasi. Procerus is derived from the second pharyngeal arch and is innervated by the facial nerve (CN VII ...The bone at a muscle's origin shows little or no movement when that muscle contracts. True False. True. The interosseous muscles are fusiform. True False. ... The orbicularis oculi moves the eye, for example when you are reading a page of print. True False. False.Origin and insertion. Depressor labii inferioris originates from the oblique line of mandible, between the symphysis menti and mental foramen.From here, the muscle courses superomedially, inserting to the skin and submucosa of lower lip. The mandibular end of depressor labii inferioris is continuous with platysma, while the labial attachment fuses with its counterpart and inferior fibers of ...The area covered by the orbicularis oculi (OOc) m. is considered the "periorbital region.". This territory extends from the upper and lower eyelids to the eyebrows. The OOc m. is the muscle that determines the shape of the eyes and facial expressions. The OOc m. is an elliptically broad and flat muscle that acts in closing the eyelid, which ...orbicularis oculi: orbital part: medial orbital margin and the medial palpebral ligament; palpebral part: medial palpebral ligament ... has a round tendon of origin; popliteus unlocks the knee joint to initiate flexion of the leg: psoas major: bodies and transverse processes of lumbar vertebrae:16. Masseter 17. Orbicularis oculi 18. Buccinator 19. Platysma 20.Zygomaticus minor 21. Temporalis 22. Orbicularis oris 23.Zygomaticus major Show transcribed image text. Expert Answer. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We reviewed their content and use your feedback to keep the quality high.oculi, lacrimal part of the , and corrugator supercilii. M. oculi is a transversely oval sphincter muscle surrounding and occupying the eyelids. It is divisible into an orbital portion ... Daniel John Cunningham, Oculoplastic Surgery Atlas: Cosmetic Facial Surgery.The frontalis muscle is a thin, flat band in the anterior scalp. It has several origin points: the procerus muscle, the corrugator supercilii muscle, the orbicularis oculi fascia, and the zygomatic process of the frontal bone. It obviously covers a lot of ground. It inserts on the superficial fascia of the facial muscles, as well as the skin ...Frontalis muscle. The frontalis muscle (from Latin 'frontal muscle') is a muscle which covers parts of the forehead of the skull. Some sources consider the frontalis muscle to be a distinct muscle. However, Terminologia Anatomica currently classifies it as part of the occipitofrontalis muscle along with the occipitalis muscle. [2]Aug 14, 2023 · The corrugator supercilii muscles exist as a pair of small pyramidal muscles that lie deep to the frontal portion of the occipitofrontalis and the orbicularis oculi muscles. They arise from the medial supraorbital ridge of the frontal bone. From the medial end of the eyebrow, the corrugator supercilii muscles travel laterally and above the ... Aug 6, 2018 · Origin: The origin of the frontalis muscle is the galea aponeurotica, which is a fibrous layer that covers the top of the cranium and extends from the forehead to the back base of the skull. Insertion: It inserts as right and left bellies from the skin of the eyebrow, with fibers extending down to interdigitate with orbicularis oculi and procerus. The orbicularis oculi muscle is responsible for various functions such as the blinking motion, keeping the correct lid posture, enhancing lacrimal drainage, and expressing intricate facial expressions. 1 It is innervated by the medial and lateral motor routes. It had been assumed that that the superficial buccal branch 2, 3 (or the angular nerve 4, 5) supplied the medial orbicularis oculi ...Purpose: To document a unique case of a corneal/conjunctival epithelial inclusion cyst located in the orbicularis oculi muscle with a comprehensive review of variant conjunctival cysts and simulating conditions. Methods: Clinicopathologic case report with detailed histopathologic and immunohistochemical evaluation for cytokeratins combined with a tabulation of mimicking lesions and relevant ...The final depressors of the brow are the orbicularis oculi muscle and depressor supercilii muscles. Although some consider the depressor supercilii to be a portion of the ocbicularis oculi, most aesthetic physicians recognize it as a distinct muscle with an origin on the medial orbital rim near the lacrimal bone and an insertion onto the …Orbicularis Oculi. The orbicularis oculi muscle surrounds the eye socket and extends into the eyelid. It has three distinct parts – palpebral, lacrimal, and orbital. Attachments – Originates from the medial orbital margin, the medial palpebral ligament, and the lacrimal bone. It inserts onto the skin around the margin of the orbit as well ...Its origin is the medial side of the orbit and the insertion is the path that circles the orbit. The nerve responsible for it is the facial nerve or cranial nerve VII [ 1 ]. Orbicularis oculi is not attached to any bones on the lateral side that is why when you close your eyelids, they are both drawn to the middle [ 2 ].The orbicularis oculi originates (begins) from the front surface of the orbital margin, which is the rim of the eye socket. From the orbital margin, the muscle extends inward and inserts on the...Detail of the Mona Lisa, who is known for her smile. A smiling child. A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth.Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile.Among humans, a smile expresses delight, sociability, happiness, joy, or amusement.Frontalis muscle. The frontalis muscle (from Latin 'frontal muscle') is a muscle which covers parts of the forehead of the skull. Some sources consider the frontalis muscle to be a distinct muscle. However, Terminologia Anatomica currently classifies it as part of the occipitofrontalis muscle along with the occipitalis muscle. [2]Jan 11, 2023 · Origin of Corrugator Supercilli: The corrugator supercilii originates on the medial orbital rim, near the lacrimal bone. It originates from the medial end of the superciliary arch; & its fibers pass upward & laterally, between the palpebral & orbital portions of the orbicularis oculi muscle, & are attached to the deep surface of the skin, above ... Origin. The frontal belly of the occipitofrontalis originates from the epicranial aponeurosis (galea aponeurotica). Insertion. The frontal belly inserts into the skin of the eyebrow.. Action. Upon contraction, the frontal belly lifts the eyebrow and upper eyelid, thus producing horizontal wrinkles in the skin of the forehead.Contractions of this muscle produce the facial expression of ...Levator labii superioris muscle (Musculus levator labii superioris) Levator labii superioris is a short, paired triangular muscle of the face.It belongs to the buccolabial group of muscles of facial expression.This is a broad group of muscles, that besides levator labii superioris also contains levator labii superioris alaeque nasi, zygomaticus major, …The m. orbicularis oculi, m(4), was measured dorsally at its widest part of the pars palpebralis. The inserting fibres of the m. frontoscutularis were not taken into account. ... Its origin lies a little caudoventrally of the foramen infraorbitale, and it inserts with a fairly broad aponeurosis in the area surrounding the nostril and the upper lip.Corrugator supercilii exerts traction on the skin above the supraorbital margin. The combined actions of the orbicularis oculi and corrugator muscle pull the eyebrows medially and inferiorly. This action can serve different functions, such as protecting the eyes from bright sunlight or rain. Due to its role in the facial expression of frowning ...Platysma. The platysma is a thin sheet-like muscle that lies superficially within the anterior aspect of the neck. It arises in the upper thoracic and shoulder regions from a fascia that covers the pectoralis major and deltoid muscles. Its fibers ascend superomedially over the anterolateral aspect of the neck, to attach on the mandible and …Bookshelf ID: NBK441907. The orbicularis oculi muscle is a muscle located in the eyelids. It is a sphincter muscle arranged in concentric bands around the upper and lower eyelids. The main function of the orbicularis oculi muscle is to close the eyelids. This occurs when the muscle contracts. It also assists in the drainage of tears from the eyes. The orbicularis oculi muscle, an important mimetic muscle, was investigated to ascertain its anatomical relation to facial aging-especially its orbital part (Oo). Previous studies of the distinct muscle bundles frequently found inferior to the Oo have provided various definitions, including that of the malaris muscle. ...A balance must then be achieved between the pull of the frontalis, orbicularis, and glabellar complex to maintain an aesthetically pleasing brow position and shape. The glabellar complex comprises the medial brow depressors: procerus, corrugator supercilii, depressor supercilii, and the orbicularis oculi muscles (Fig. (Fig.2). 2). Understanding ...Medial rectus muscle (Musculus rectus medialis) Medial rectus is one of the six extraocular muscles located in the orbit. Attaching between the bony walls of the orbit and the eyeball, these muscles serve to synchronously move the eyes.Besides medial rectus, this group of muscles also gathers the superior rectus, inferior rectus, lateral rectus, superior oblique and inferior oblique muscles.Origin. The fibers of the buccinator arise from the pterygomandibular raphe and alveolar processes of the maxilla and mandible at the region of the first and second molar teeth. Insertion. The buccinator inserts into the angle of the mouth and modiolus, radiating into the fibers of the orbicularis oris muscle.Hemifacial spasm(HFS) is a movement disorder that is characterized by involuntary tonic - clonic contractions of the mimetic muscles on one side of the face. Bilateral cases are uncommon. The affected muscles those of facial expression which are innervated by cranial nerve VII - the Facial nerve. It often initially affects the orbicularis oculi muscle and may spread to include other muscles of ...Horner's muscle (the palpebral part of the orbicularis oculi muscle) has a fan-shaped origin in the lacrimal bone. Its muscle fibers are oriented from 160 to 210 degrees relative to the ear-eye plane and converge towards the medial palpebral commissure. Then the muscle divides into superior and inferior bundles of fibers.Aug 6, 2018 · The orbicularis oculi muscleinsertion :- the lateral palpebral raphe which is located on the outer part of each eye socket.concentric rings return to the point of origin . upper and lower tarsi .nerve supply :- The upper half of the orbicularis oculi muscle receives its innervation from the temporal branch of the seventh cranial nerve (facial ... The CSM originates along the supraciliary arch. The muscle is attached at its medial and superior margin, whereas the lateral and inferior margins are free. The muscle originates from a bony plateau on the supraciliary arch. The CSM travels laterally, with most of the muscle passing through the fibers of the orbicularis oculi and the frontalis.Study with Quizlet and memorize flashcards containing terms like the orbicular oculi helps what, this muscle is also involved in, origin of orbicularis oculi and more.orbicularis definition: 1. relating to muscles found in the eye or the mouth 2. relating to muscles found in the eye or the…. Learn more.The levator palpebrae superioris muscle is a small muscle of the superior orbit that elevates and retracts the upper eyelid. It is not part of the extraocular muscles; it does not insert on the globe and therefore does not produce eye movements. But it is considered to be one of the facial muscles. It is composed of skeletal striated muscle ...plural orbiculares oculi. : the muscle encircling the opening of the orbit and functioning to close the eyelids.Activity associated with that of orbicularis oculi. Origin: arch of frontal bone above nasal bone. Insertion: skin of eyebrow. Action: draws eyebrow medially, inferiorly, wrinkles skin of forehead vertically. Levator labii superioris. Thin muscle between orbicularis oris, inferior eye margin. Origin: zygomatic bone, infraorbital margin of maxilla.The orbicularis oculi muscles circle the eyes and are located just under the skin. Parts of this muscle act to open and close the eyelids and are important muscles in facial expression. Updated by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda ...It is located at the medial end of the eyebrow, beneath the frontalis, and just above the orbicularis oculi muscle. It arises from the medial end of the superciliary arch and its fibers pass upward and laterally, between the palpebral and orbital portions of the orbicularis oculi muscle. ... At its origin point, corrugator supercilii is found ...The orbicularis oculi muscle is a thin sheet of concentrically arranged muscle fibers covering the eyelids and periorbital region . It is oval, with the long axis being horizontal, corresponding to the palpebral opening. ... The medial origin of the pretarsal orbicularis is thought to arise from two heads—the deep and the superficial heads.Orbicularis oris muscle. The orbicularis oris muscle is a sphincter muscle that is located in the face and surrounds the mouth. It is a broad, thin muscle that is composed of several fibers that are arranged in a circular pattern. The muscle is attached to the skin of the lips and the mucous membrane that lines the inside of the mouth.The orbicularis oculi muscles derive from the mesenchyme in the second pharyngeal arch (Moore et al., 2015) and are innervated by the VII cranial nerve (Ouattara et al., 2004). Weakness of the orbicularis oculi muscles is often apparent in neuromuscular disorders affecting the neuromuscular junction (Miller et al., 2008).Origin: Sphenoid bone Insertion: Tarsal plate, upper eyelid Artery: Ophthalmic artery Nerve: Oculomotor nerve Action: Retracts - Elevates eyelid Antagonist: Orbicularis oculi muscle Description: The levator palpebrae superioris is the muscle in the orbit that elevates the superior (upper) eyelid. The levator palpebrae superioris originates on the lesser wing of the sphenoid bone, just above ... Study with Quizlet and memorize flashcards containing terms like Orbicularis Oculi: Action, Orbicularis Oculi: Origin and Insertion, Orbicular Oris: Action and more. Try Magic Notes and save time. Try it free. Try Magic Notes and save time Crush your year with ...Orbicularis oculi. Origin: infraorbital rim, nasal process of frontal bone, and frontal process of maxilla ... Origin: on the frontal bone in the supra orbital region Orbicularis oculi ( pronunciation: or-bi-kyu-LAR-is OK-yu-lai) refers to the muscle around the eyes. Its origin is the medial side of the orbit and the insertion is the path that circles the orbit. The nerve responsible for it is the facial nerve or cranial nerve VII [ 1 ]. Orbicularis oculi is not attached to any bones on the lateral side that ...compresses cheeks. zygomaticus major origin. zygomatic bone. zygomaticus major insertion. skin and muscle at corner of mouth. zygomaticus major action. (smiling muscle) raises lateral corners of mouth upward. levator labii superioris origin. zygomatic bone and infraorbital margin of maxilla.Innervation of the Orbicularis Oculi Muscle: the temporal branch supplies the lateral and superior part of the orbicularis oculi (not shown). The lateral and lower eyelid orbicularis is supplied by branches of the zygomatic branches. The most medial lower and upper eyelid orbicularis muscle is supplied by the terminal buccal nerve branches.The oris locates it around the mouth. There is also a circular muscle around the eye called the orbicularis oculi. Relative Position: Example: Lateral/medial pterygoids. This one gives the origin on a pterygoid plate but confusingly there are two pterygoid plates named the medial and lateral.This muscle is named for its origin on the side of the head and it inserts on the mandible. Epicranius. Temporalis. Lateral pterogoid. Medial pterogoid . masseter. Multiple Choice. ... Orbicularis Oculi. zygomaticus. Occipitals. platysma. Multiple Choice. Edit. Please save your changes before editing any questions. 30 seconds. 1 pt. Orbicularis ...The MOO overlies the origin of the levator lip muscles and is deep to the MFP. The location of major ZCL is shown as a green circle. MFP, malar fat pad; OOM, orbicularis oculi muscle; ZCL ...Temporal - Innervates the frontalis, orbicularis oculi and corrugator supercilii. Zygomatic - Innervates the orbicularis oculi. Buccal - Innervates the orbicularis oris, buccinator and zygomaticus. Marginal mandibular - Innervates the depressor labii inferioris, depressor anguli oris and mentalis. Cervical - Innervates the platysma.Study with Quizlet and memorize flashcards containing terms like a) frontalis-face b) orbicularis oculi-eye/face c) orbicularis oris - mouth d) buccinator- cheek e) Platysma- neck f) zygomaticus major and minor- face g) Risorius- face h) occipitallis- head, a) masseter m. b) temporallis, a) sternocleomastoid b) splenius capitus c) splenius cervicis and more.The orbital group consists of the orbicularis oculi (3 portions), depressor supercilii, and corrugator supercilii (oblique and transverse heads). These muscles provide movement of the eyelid, eyebrow, and periorbital skin and are innervated by branches of the facial nerve .Origin: Anterior portion of the galea aponeurotica; Insertion: Interdigitates with the orbicularis oculi, procerus, and corrugator muscles. (Interdigitation refers to the intertwining of ...Orbicularis Oculi' fibers flow laterally, creating a thin layer where the eyelids are (palpebrae).This sphincter muscle surrounds the orbit of the eyeball but also covers the temples and a bit of the cheek. It's usually divided into three sections: orbital, palpebral and lacrimal. The orbital section appears to be thicker, with fibers taking the shape of an continuous ellipse at the ...Zygomaticus minor lies deep to the subcutaneous fat of the face and superficial to the levator anguli oris muscle. Zygomatic branches of facial nerve course between the adjacent surfaces of these two respective muscles.. Zygomaticus minor is placed in the same plane as, and superior to, zygomaticus major and sits inferiorly to orbicularis oculi.The labial attachment of the muscle is lateral to ...Orbicularis oculi is a paired facial muscle that surrounds each orbit and the adjacent periorbital region. …. Orbicularis oculi. Origin. Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone. Insertion. Key facts about the internal abdominal oblique. Table quiz. Origin. Anterior two-thirds of iliac crest, iliopectineal arch, thoracolumbar. fascia. Insertion. Inferior borders of ribs 10-12, linea alba, pubic crest & pectin pubis (via conjoint tendon) Action. Bilateral contraction - Trunk flexion, compresses abdominal viscera, expiration.Another example is the orbicularis oculi ("ocular" means "eye"), which surrounds each eye. The circular muscles expand and contract in a circular way. ... The origin is the unmoving, stable connection of the muscle to a structure, usually a bone. The insertion is the moveable end of the muscle, and it inserts onto various structures in ...Levator anguli oris originates from the canine fossa of maxilla, inferior to the infraorbital foramen. After a short inferior course, it blends with the modiolus at the angle of the lips. Modiolus is a fibromuscular nodule at the angle of the mouth formed by at least nine muscles. It serves as an attachment hub for most of the buccolabial ...The orbicularis oculi muscle is responsible for eyelid tone and closure and is innervated by zygomatic and buccal branches of the facial nerve. 32 It is believed that the inner ... . 28, 29, 31 The medial aspect of this ligament is sandwiched between the maxillary origin of the preseptal and orbital orbicularis and it ends at the medial scleral ...The depressor supercilii (Latin: musculus depressor supercilii) is a facial muscle located in the eye region between both eyebrows and orbits. Many anatomical specialists consider this muscle to be a part of the orbicularis oculi muscle, instead of being a separate muscle. The depressor supercilii muscle is classified as the orbital facial muscle.Orbicularis Oculi Origin, Insertion, Action. Origin: Palpebral part: to the medial palpebral ligament and adjacent bone on the medial side of the orbit. Orbital part: to a slip of bone adjacent to the orbit on the orbital process of the frontal bone, to the frontal process of the maxilla, and to the medial palpebral ligament between the two ...Orbicularis oculi: Orbital part: frontal bone Palpebral part: medial palpebral ligament. Lacrimal part: Posterior crest of lacrimal bone ... (Also occasionally a small origin slightly on the medial epicondyle of the ulna.) The base of the distal phalanx of the thumb: Anterior interosseous nerve (branch of median nerve) (C8, T1)Can lightning strike twice? Movie producers certainly think so, and every once in a while they prove they can make a sequel that’s even better than the original. It’s not easy to make a movie franchise better — usually, the odds are that me...The antagonist muscles to the frontalis muscle are the orbicularis oculi, corrugated, and procerus muscles. The frontalis muscle has no bony attachments. The corrugator muscle is below the frontalis and the orbicularis muscles and has a bony origin from the medial orbital rim. Surface Anatomy. Frontalis muscle action produces horizontal ...• orbicularis oculi • orbicularis oris • risorius • zygomaticus major • zygomaticus minor • buccinator • platysma 3. Demonstrate the actions of these muscles in your body. 4. Locate the origins and insertions of these muscles in the human skull and skeleton. 5. Study figures 11.1 and 11.2 and table 11.2. 6.Levator palpebrae superioris has a static tone that is in balance of the opposing tone of orbicularis oculi, thereby maintaining the eyes open and defining the …It has an origin and insertion at the medial corner of the eye so acts like a sphincter squeezing the eye shut. It does have two parts though as the muscle in the eyelids are considered part of this muscle in addition to the circular fibers that surround the eye. Figure 20. Learn about Orbicularis Oculi from Head and Neck Anatomy: Part II ...ORBICULARIS ORIS. ORIGIN Near midline on anterior surface of maxilla and mandible and modiolus at angle of mouth: INSERTION Mucous membrane of margin of lips and raphe with buccinator at modiolus: ACTION Narrows orifice of mouth, purses lips and puckers lip edges:Learn about the anatomy of orbicularis oculi in a easy and simplified way with lots of colorfull pictures.Please like, share & subscribe to my channel and en...The orbicularis oculi muscle is divided into 3 parts, organised concentrically around the palpebral fissure. The orbicularis oculi muscle is innervated by the temporal and zygomatic branches of the facial nerve. ... Origin: Lesser wing of sphenoid; Insertion: Dermis and superior edge of tarsus, which creates a supratarsal crease and upper ...The superficial musculoaponeurotic system. The SMAS is a thin layer of fascia 3 investing the platysma and the superficial facial muscles including the frontalis, inferior orbicularis oculi, the mid-face levators, and orbicularis oris ( Fig. 1.11 ). The SMAS can be tensed by contracting these muscles. These central facial muscles transmit their ...B) Lateral sub-orbicularis oculi fat. The sub-orbicularis oculi fat compartme, Orbicularis Oculi Origin, Insertion, Action. Origin: Palpebral part: to the medial palpebral ligament and adjace, Omotransverse muscle - Origin; Optic canal; Orbicularis oculi muscle; Orbicularis oculi muscle - Insertion, orbicularis oculi origin. medial wall of orbit. orbicularis oculi insertion. circular path around o, origin: sternum and clavicle. insertion: mastoid process of temporal bone. action: pulls head to, Insertion: the muscle inserts on the mandible, the cheek skin, the commissure of the mouth, the orbic, orbicularis oris, buccinator, zygomaticus major, risorius, levator anguli oris, depressor anguli oris. It is s, The aim of this study was to clarify the location of the orig, orbicularis oculi attachments-medial orbital margin-lacrimal bon, Occipitofrontalis muscle consists of two muscle bellies, Orbicularis Oculi "around the eye" Action:, Background: In the malar region, the SMAS flap can be thin and, Its origin is the medial side of the orbit and the insertion is , Orbicularis Oculi Origin, Insertion, Action. Origin: Palpebral par, Origin and insertion. Depressor anguli oris originates from t, Apr 9, 2023 · The corrugator supercilii is a, The orbicularis oris is a circular muscle that moves the lips, The orbital group consists of the orbicularis oculi (3 portions), depr.