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What are the muscles of the Belly? The SCM has two heads. The sternocleidomastoid is innervated by the accessory nerve . Synergist: Sternohyoid Antagonist: Sternothyroid . Synergist: trapezius, Action: extends or hyperextends head Which of the following muscles is (only) responsible for scapular protraction and upward rotation? C. The sternocleidomastoid is the prime mover and the splenius cervicis is the antagonist. Synergist: Extensor digitorium, Action: Powerful arm extensor Which of these muscles is not the muscle of inspiration? B. Abdominal. B), Which large muscle has an attachment on the external occipital protuberance and extends the neck? How did the United States respond to Jewish refugees after Kristallnacht? (a) Auricular. Lippincott, Williams and Wilkins. a. splenius cervicis b. latissimus dorsi c. trapezius (upper fibers) d. serratus anterior e. teres major. In this regard we may refer to Sinohara's law of fusion which states that a muscle supplied by two different nerves is formed by fusion of two separate muscle masses. The t-tubule meets with the sarcoplasmic reticulum at locations throughout the muscle fiber, at these locations the sarcoplasmic reticulum releases calcium ions that results in the movement of troponin and tropomyosin on thin filaments. Drug combinations may exhibit synergistic or antagonistic effects. For example, the SCM on the right side of your neck tilts your head to your right. On either side, the SCM diagonally divides the neck musculature into anterior (front) and posterior (back) triangles. When the clavicular origin is broad, it is occasionally subdivided into several slips, separated by narrow intervals. a. Levator scapulae b. Pectoralis minor c. Rhomboid d. Serratus anterior e. Trapezius. Antagonist: Extensor digitorium longus Edit. Antagonist: Tibialis anterior 5th Edition. Occasionally, the lower portion of the SCM muscle is intercepted by tendinous intersections which indicate the origin of this muscle from different myotomes .The organizational pattern of the SCM can be arranged into five distinct topographical parts, namely the superficial sternomastoid, profound sternomastoid, sterno occipital, cleidomastoid and cleidooccipital parts which are arranged in superficial and deep layers. a. Digastric b. Mylohyoid c. Omohyoid d. Sternocleidomastoid. Then slowly reread the passage, writing your own definition for each italicized word. Is this considered flexion or extension? It is given the name sternocleidomastoid because it originates at the manubrium of the sternum (sterno-) and the clavicle (cleido-) and has an insertion at the mastoid process of the temporal bone of the skull.[3]. Antagonist: Gluteus maximus c) medial pterygoid. b) gastrocnemius. It can be felt on each side of the neck when a person moves their head to the opposite side. Synergist: pectineus, Action: Hip flexor a) frontalis. Physiopedia is not a substitute for professional advice or expert medical services from a qualified healthcare provider. They derive embryonically from the first and second pharyngeal arches. Synergist: teres minor, Action: Lifts ribs (a) Teres major (b) Triceps brachii (c) Pectoralis major (d) Latissimus dorsi. Sternothyroid is a paired strap muscle located in the muscular triangle of the neck.It is a part of a group of muscles called the infrahyoid muscles.There are four such muscles that are grouped into superficial and deep layers. Sternocleidomastoid. Antagonist: Adductor mangus Muscle agonists. The Internet Journal of Human Anatomy, 2010, Kaur D et al. The sternocleidomastoid muscles help to flex the neck. What is the function of the sternocleidomastoid muscles? indirect object. Why did medieval Europe's attitudes toward Jews change? A. appall a. Biceps brachii b. Triceps brachii c. Jaw d. Tongue. These cookies do not store any personal information. Antagonist: gastrocnemius Which muscle acts as a synergist with pectorals minor during abduction of the scapula? We also use third-party cookies that help us analyze and understand how you use this website. antagonist: tensor fasciae latae, gluteal minimus, medius muscles, synergist: gastrocnemius Clavicular Head:Superior surface of the medial one-third of the clavicle, Insertion: Lateral surface of the mastoid process, the lateral half of the superior nuchal line, Actions: When you take a deep bow, which of the following muscles do you use? The form of a muscle that stabilizes the origin of the prime mover so that it can act more efficiently is called the: a. synergist b. agonist c. antagonist d. fixator e. secondary mover The muscles of ____ lie within the subcutaneous layer, originating on the fascia or bones of the _____ and inserting into the _____. Which of the following muscles does not attach to the humerus? antagonist: deltoid, teres minor, infraspinatus, synergist: pectoralis major and serratus anterior, synergist: latissimus dorsi, subscapularis, teres major, biceps brachii, latissimus dorsi, deltoid, synergist: pectoralis minor M. lavish Antagonist: Scalenes Necessary cookies are absolutely essential for the website to function properly. Which of the following muscles is a rotator cuff muscle? Study with Quizlet and memorize flashcards containing terms like Buccinator Synergist, Buccinator Antagonist, Frontalis Antagonist and more. Synergist: pectoralis major, Action: Flexes wrist and middle phalanges _____ was likely to be burnt at the stake. Scalene Muscle Group Synergist: Sternocleidomastoid, Longus colli and capitis It tilts your head to the ipsilateral (same) side to which the muscle is located. Synergist: Splenius, Action: adducts and medially rotates arm The sternocleidomastoid (right muscle shown) can be clearly observed when rotating the head. Muscles have a point of origin and a point of insertion origin - (head) - normally is more stationary than insertion insertion - undergoes more movement. Download page 151-200 on PubHTML5. Which of the following muscles is completely superficial? Synergist muscles help other muscles perform one or more functions. The relationship between these muscles when bowing you head is C) The sternocleidomastoid is the prime mover and the splenius cervicis is the Our experts can answer your tough homework and study questions. synergist: sternocleidomastoid, rhomboids supraspinatus synergists: middle deltoid and infraspinatus antagonist: pectoralis major, latissimus dorsi, teres major Antagonist: sartorious You also have the option to opt-out of these cookies. They assist the SCM in turning and tilting both the head and neck. "5. Such cases represent the developmental defect of muscular agenesis and are diagnosed by Ultrasound or Magnetic Resonance Imaging scans. The sternocleidomastoid muscle has a cylindrical, strap-like shape that emerges from the side of your neck and tapers at the ends. H. erroneous Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. K. irascible synergist: sternocleidomastoid, rhomboids, synergists: middle deltoid and infraspinatus, synergist: teres minor, subscapularis, supraspinatus, deltoids, synergist: deltoid, pectoralis major, latissimus dorsi, subscapularis, synergist: rhomboids, pectoralis major, teres major, synergist: supraspinatus and pectoralis major (for flexion) Furthermore, they are components of the boundaries of the submental and submandibular triangles of the neck. Treatment for this involves strengthening exercises for the SCM muscle, and repair of the nerve if possible. Philadelphia: Lea and Febiger, 1918; Bartleby.com, 2000. All rights reserved. But opting out of some of these cookies may affect your browsing experience. In this situation, the SCM also turns the face upward just a little, adding in a bit of neck extension. A) The sternocleidomastoid is the prime mover, and the splenius cervicis is the fixator. Treatment involves physiotherapy exercises to stretch the involved muscle and strengthen the muscle on the opposite side of the neck. a) Long head of biceps brachii b) Pectoralis minor c) Coracobrachialis d) Short head of biceps brachii. Synergist: Tibialis anterior, Action: Stabilizes trunk Which of the following muscles is most active during medial rotation of the arm? Antagonist: tensor fascia latae Createyouraccount. Gluteus maximus The information provided on this site is not a substitute for a physical consultation with a medical professional. Synergist: transverse abdominis, Action: compresses abdominal contents Vascular supply: Muscular branches of the ascending Cervical artery. Synergist or Antagonist DRAFT. Synergist: Abductor pollicis longus, Action: forearm flexor Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Synergist: pectoralis major, Action: medial rotation of shoulder Insert a caret (^) to show where the word only should be placed to match the meaning in parentheses. Introduction ; 11.1 Interactions of Skeletal Muscles, Their Fascicle Arrangement, and Their Lever Systems ; 11.2 Naming Skeletal Muscles ; 11.3 Axial Muscles of the Head, Neck, and Back ; 11.4 Axial Muscles of the Abdominal Wall, and Thorax ; 11.5 Muscles of the Pectoral Girdle and Upper Limbs ; 11.6 Appendicular Muscles of the Pelvic Girdle and Lower Limbs ; Key Terms For example, the agonist, or prime mover, for hip flexion would be the iliopsoas. Antagonist: abductor pollicis longus Antagonist: external intercostals Interrelationship of the Spine, Rib Cage, and Shoulder", "28. Platysma - single sheetlike; covers anterolateral neck; Sternocleidomastoid - paired muscle; PRAYER MUSCLE There are also cases presenting with extra sternal and clavicular heads of origin in SCM.These additional heads, may be unilateral or bilateral and cause significant stenosis of the lesser supraclavicular fossa, imposing complications for anesthesiologists during the anterior central venous catheterization approach. The sternocleidomastoid muscles flex the neck, and the splenius cervicis muscles extend it. synergist that assists an agonist by preventing or reducing movement at another joint, thereby stabilizing the origin of the agonist flexion movement that decreases the angle of a joint fulcrum an axis of rotation, like a joint fusiform muscle that has fascicles that are spindle-shaped to create large bellies insertion antagonist: adductor group, gracilis, synergist: gluteus medius, gluteus minimus, gluteus maximus The superficial layer includes sternohyoid and omohyoid, while the deep layer is made up of sternothyroid and thyrohyoid. Innervation is when an organ or body part is supplied with nerves. The neck muscles are responsible for stabilizing and moving the head in every direction and for pulling the jaw and skull towards the chest. Sternal Head:Upper part of the anterior surface of the manubrium Their antagonists are the muscles. This website uses cookies to improve your experience while you navigate through the website. antagonist: tensor fasciae latae, gluteal minimus, medius muscles, synergist: sartorius This category only includes cookies that ensures basic functionalities and security features of the website. Frowning (antagonist of zygomaticus) Orbicularis oris Indirectly from maxilla/mandible, fibers blend. The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. The cookie is used to store the user consent for the cookies in the category "Other. It is thick and thus serves as a primary landmark of the neck, as it divides the neck into anterior and posterior cervical triangles (in front and behind the muscle, respectively) which helps define the location of structures, such as the lymph nodes for the head and neck.[8]. Such a phenomenon describes Sinohara's law of separation which states that two muscles( SCM and trapezius ) having common nerve supply ( accessory nerve ) are derived from a common muscle mass8. When acting alone it rotates to the opposite side (contralaterally) and slightly (laterally) flexes to the same side. [3][4] The sternocleidomastoid is thick and narrow at its centre, and broader and thinner at either end. The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). The muscle allows the head and vertebrae to extend. on 2022-08-08. a) temporalis. Agonist is deltoid, antagonist is the latissimus dorsi. Along the muscle fibers are t-tubule openings which facilitate the spread of the action potential into the muscle fibers. a. Anterior deltoid b. Which of the following muscle is most active during the abductive of the arm? Advertisement Middle Trapezius a) Zygomaticus major b) Digastric c) Sternohyoid d) Depressor anguli oris. What is the relationship between these muscles when bowing your head? a) sternocleidomastoid b) orbicularis oculi c) trapezius d) platysma, Which muscle acts to anchor the scapula? Six heads of origin of sternocleidomastoid muscle: a rare case. Middle deltoid c. Posterior deltoid d. Superior deltoid. E. desultory Antagonist: triceps brachii chest press -> rotator cuff Antagonist . Synergist: external intercostals. Excellent visuals! testreviewer. Synergist: Temporalis, Action: Closes jaw The number of these extra clavicular slips may vary and such occurrence may be unilateral or bilateral. In the Middle Ages, when the Catholic Church was all-powerful, a(n) This can cause atrophy (shrinking) in the affected SCM and may cause difficulty in turning the head and bending the neck. Synergist: gluteus maximus, Action: adducts and medially rotates arm The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. However, you may visit "Cookie Settings" to provide a controlled consent. I give my consent to Physiopedia to be in touch with me via email using the information I have provided in this form for the purpose of news, updates and marketing. Sternocleidomastoid --- Splenius Capitis. Antagonist: infraspinatus Variations Of The Sternocleidomastoid Muscle: A Literature Review. Which muscle depresses the clavicle and stabilizes the pectoral girdle? c) brachialis. Read our. a. Latissimus dorsi b. Rhomboid d. Trapezius d. Teres major. What are various methods available for deploying a Windows application? The SCM becomes chronically shortened in cases of torticollis. The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. Sternocleidomastoid is the most superficial and largest muscle in the front portion of the neck. ). Antagonist: Flexor carpi ulnaris (a) Brachialis (b) Subscapularis (c) Teres minor (d) Supraspinous. sternocleidomastoid synergist and antagonist The time in the first time zone east of the date line is 232323 hours earlier than the time in the first time zone to the west. The longus colli is a deep cervical flexor acting as an important synergist with the sternocleidomastoid muscle. Bordoni B, Varacallo M. Anatomy, head and neck, sternocleidomastoid muscle. Sternocleidomastoid (Action, Synergist, Antagonist, BodyBuilder (Y/N)) Action: Flexes or Rotates the Head Synergist: N/A Antagonist: N/A BodyBuilder: Yes . This muscle binds the skull to the sternum and clavicle. e) latissimus dorsi. Get Top Tips Tuesday and The Latest Physiopedia updates, The content on or accessible through Physiopedia is for informational purposes only. [3] It travels obliquely across the side of the neck and inserts at the mastoid process of the temporal bone of the skull by a thin aponeurosis. 3. This would leave no posterior triangle. A. rectus abdominis B. transversus abdominis C. erector spinae D. latissimus dorsi. In an antagonistic muscle pair, as one muscle contracts, the other muscle relaxes or lengthens. Antagonist: deltoid Synergist: Action: stabilizes pelvis antagonist: adductor group, rectus femoris, synergist: gluteal minimus and tensor fasciae latae Rational design of synergistic drug combinations remains a challenge despite active experimental and computational efforts. One side can contract, or both sides can contract. The manubrium is the uppermost section of the breastbone. Lower: Depress the scapula, upwardly rotate the scapula, Upper: Levator scapula, serratus anterior, SCM, The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. ), In American English, words ending in the sound ens are usually spelled with -nce, as in reverence. Which of the following muscles extends the head on the neck? Upload your PDF on PubHTML5 and create a flip PDF like Seeleys essentials of anatomy physiology ( etc. As the muscles contract across the shoulder joint it brings your shoulder upward into flexion as you push the ball the opposite happens and the antagonist becomes your deltoid and the latissimus dorsi becomes your agonist. Which of the following does not attach to the corocoid process of the scapula? Which of the following muscles is most active during flexion of the arm/glenohumeral joint? Synergist: Gluteus maximus, Action: Medially rotates leg at thigh A. Pronator teres B. Flexor carpi radialis C. Brachioradialis D. Flexor carpi ulnaris E. Biceps brachii. Cervical Muscle Myoelectric Response to Acute Experimental Sternocleidomastoid Pain. (a) Biceps brachii (b) Latissimus dorsi (c) Pectoralis major (d) Subscapularis. L. languish The arrival times were so different because the airplanes cross(6)\overset{\text{(6)}}{{\underline{\text{cross}}}}cross(6) the International Date Line during the flights. antagonist: erector spinae muscles, synergist: rectus abdominis, internal oblique It covers the anterior surface of the neck superficially. LAB 5 Muscle I Axial Muscular System Objectives: To know the primary functions of the muscular system. Antagonist: adductor mangus 9th - 12th grade. Sternocleidomastoid --- Splenius Capitis Preview this quiz on Quizizz. Unilaterally: Elevate the scapula, downwardly rotate scapula, laterally flex the head and neck, rotate the head and neck, Spinous processes of all vertebrae except C-1, Bilaterally: Extend the vertebral column It travels superiorly, laterally, and posteriorly. Muscles that Act on the Scapula . A. Sternocleidomastoid. Synergist: Pectoralis major Antagonist: Spino-deltoid. a) trapezius b) levator scapula c) serratus anterior d) latissimus dorsi. These cookies ensure basic functionalities and security features of the website, anonymously. Antagonist: Gastrocnemius What muscle attaches at the anterior superior iliac spine, and crosses both the hip and knee joints? [8], The triangle formed by the clavicle and the sternal and clavicular heads of the sternocleidomastoid muscle is used as a landmark in identifying the correct location for central venous catheterization. Antagonist: Masseter Antagonist: pronator teres What is the antagonist muscle in elbow flexion? a) biceps femoris b) brachioradialis c) triceps brachii d) pectoralis major e) deltoid. - a synergist - an antagonist - a fixator - a prime mover - an antagonist. Michael Menna, DO, is a board-certified, active attending emergency medicine physician at White Plains Hospital in White Plains, New York. Congenital torticollis can have an unknown cause or result from birth trauma that gives rise to a mass or tumor that can be palpated within the muscle. 3rd. antagonist: tensor fasciae latae, gluteal minimus, and medius muscles, synergist: adductor muscles and gracilis Synergist: Extensor hallucis longus, Action: Prime mover of toe extension Peripheral Nerve Surgical Procedures for Cervical Dystonia", "64 Cranial Nerve XI: The Spinal Accessory Nerve", https://en.wikipedia.org/w/index.php?title=Sternocleidomastoid_muscle&oldid=1134499511. Which muscle acts as an antagonist to trapezius? This cookie is set by GDPR Cookie Consent plugin. 2 What are synergist muscles? Acetylcholine (ACH) is released from vesicles and is sent over the synaptic cleft to receptors on the postsynaptic bulb. A. sternocleidomastoid muscles B. scalene muscles C. pectoralis major D. masseter, Which muscle is directly superior to the trapezius? The scalenes are synergist (helper) muscles to the SCM. d) biceps brachii. Synergist: Sarotious, Action: Abducts and medially rotates thigh These cookies will be stored in your browser only with your consent. Necessary cookies are absolutely essential for the website to function properly. To explain skeletal muscle movements as activities of agonists (prime movers), antagonists, and synergists. . Protrusion-Retrusion involves the movements of _______ muscle. a) gluteus medius. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. When acting together it flexes the neck and extends the head. The antagonist of the splenius capitis muscle is the Sternocleidomastoid. Synergists and Antagonists Synergists - are groups of muscles working together to cause movement Which of the following muscles is most active during lateral rotation of the arm? [3] It also flexes the neck. (a) Brachialis (b) Pronator quadratus (c) Biceps brachii (d) Supinator. This paired muscle is fan-like in shape and covers the upper lateral side of either buttock. One head attaches to the front (i.e., the anterior surface) of the manubrium. The sternocleidomastoid muscles (SCM) help with functions such as head rotation, head tilt, pointing the chin toward the breastbone, and more. After a signal reaches the accessory nerve nucleus in the anterior horn of the spinal cord, the signal is conveyed to motor endplates on the muscle fibers located at the clavicle. Spinal accessory nerve (XI), with sensory supply from C2 & C3 (for proprioception), Sternocleidomastoid branch of the Occipital artery, Draws the mastoid process down toward the same side which causes the chin to turn up toward the opposite side; acting together, the muscles of the two sides flex the neck. It was concluded that acute muscle pain is unable to maintain longerlasting resting muscle hyperactivity. The ACH causes the resting potential to increase above -55mV, thus initiating an action potential which travels along the muscle fiber. Name a muscle or muscle group and contraction type likely to be active when this person returns to an upright position after having touched their toes and the position this muscle must lie in relation to the vertebral column joints to perform that movemen. Which of the following muscles is part of the rotator cuff? Like Seeleys essentials of anatomy physiology ( etc.)? A synergist that makes the insertion site more stable is called a fixator. It also flexes the neck. By Anne Asher, CPT antagonist: latissimus dorsi, pectoralis major (for adduction), synergist: teres major, pectoralis major, latissimus dorsi (b) Ansa cervicalis. Synergist: NA, Action: Forearm supinator a. Frontalis b. Occipitalis c. Masseter d. Sternocleidomastoid e. Rectus Abdominis f. Pectoralis Minor g. Pectoralis Major h. Supraspinatus i. Infraspinatus j. Subscapularis, All of the muscles that move the glenohumeral joint have a distal attachment on the humerus, except one. Synergist or Antagonist DRAFT. This cookie is set by GDPR Cookie Consent plugin. Save. Muscle overlays on the human body. Synergist: sartorious, Action: adducts, flexes and medially rotates thigh copyright 2003-2023 Homework.Study.com. Bilaterally: Stabilizes the head, flexion of the head and neck, checkreins backwardmotion of the head and neck, Innervation:Accessory nerve: cranial nerve XII and ventral rami of the (C2, C3), Blood Supply:Branches from the vertebral artery, 1. KenHub. When one side acts alone, it causes the head to rotate to the opposite side and flexes laterally to the same side (ipsilaterally). (c) Transverse cervical. Read more, Physiopedia 2023 | Physiopedia is a registered charity in the UK, no. Middle: Pectoralis minor, serratus anterior Together they allow normal posturing of the head and neck referred to as an "elongated neck with chin tuck." Together, these muscles provide flexion of the elongated . antagonist: trapezius, latissimus dorsi, rhomboids, pectoralis major, antagonist: biceps brachii and brachialis, synergist: brachialis (adsbygoogle = window.adsbygoogle || []).push({}); For Pain and Symptom Information See: Sternocleidomastoid Muscles: Head, Eyes, Sinus, Ears, Throat Pain. Antagonist: internal intercostals Synergist: Gastrocnemius, Action: Flexes toes Which muscles make up the common flexor tendon of the medial epicondyle? They assist the SCM in turning and tilting both the head and neck. About a dozen cases have reported complete unilateral absence of the muscle. The Internet Journal of Human Anatomy 2010. G. enmity Middle Fibers: elevation, upward rotation and adduction of the scapula. Because drugs manifest their action via their targets, the effects of drug combinations should depend on the interaction of their targets in a network manner. Did Marta's family fly(5)\overset{\text{(5)}}{{\underline{\text{fly}}}}fly(5) in a time machine on the way back from Sydney? Synergist: Psoas, Action: stabilizes pelvis They act to extend the spine, bending it backwards. This tent is in the Indian stile formed of a number of (8) dressed Buffaloe skins sewed together with sinues. The sternocleidomastoid muscle is an axial muscle located on either side of the neck and supports forward and lateral flexion at the neck as well as rotation and elevation of the sternum and. Sternocleidomastoid and the Scalenes are Synergists, which mean that they work together to provide the same movements (flexion, rotation and lateral flexion of the head and neck)An Antagonist. Synergist Agonist Antagonist Stabilizers Neutralizers. Examination of the sternocleidomastoid muscle forms part of the examination of the cranial nerves. By clicking Accept All, you consent to the use of ALL the cookies. The supraspinatus and infraspinatus muscles have the main part of their body attached to which of the following bone? skeletal muscle contracts and pulls on bone. Nerve Supply: Cervical nerve 7. These muscles run up, along the spine, from the base to the skull. Action: Pulls lower lip down to expose lower teeth, Action: Pulls corners of mouth down and lateral, Action: Compresses cheeks as in whistling, Action: Primer mover to close jaw d) occipitalis. The cookie is used to store the user consent for the cookies in the category "Performance". Kendall, Florence Peterson, McCreary, Elizabeth Kendall, and Provance, Patricia Geise. Explore antagonistic muscles. When they flied(3)\overset{\text{(3)}}{{\underline{\text{flied }}}}flied(3) from Los Angeles to Sydney, Australia, they arrived at a time that was nearly 323232 hours later than the time when they left. Correct answer-short muscles: upper traps, sternocleidomastoid, lattismus dorsi, teres major, pec major/minor long muscles: rhomboids, mid traps, lower traps, . The clavicular head is composed of fleshy and aponeurotic fibers, arises from the upper, frontal surface of the medial third of the clavicle; it is directed almost vertically upward. Action: Pulls ribs forward Capt. Sternocleidomastoid: Sternocleidomastoid: Rectus Abdominus: Erector Spinae Group: Origin: where muscle meets bone that doesn't move-proximal: Insertion: where muscle meets bone that does move-distal: Agonist: muscle that contracts: Antagonist: muscle that relaxes: Synergist: muscle that also contracts to aid agonist: Fixator That is usually the journal article where the information was first stated. [7], The sternocleidomastoid is within the investing fascia of the neck, along with the trapezius muscle, with which it shares its nerve supply (the accessory nerve). a. platysma b. occipitalis c. sternohyoid d. mylohyoid. Which of the following muscles is primarily a postural muscle? 2023 Dotdash Media, Inc. All rights reserved. See examples of antagonist muscles. 1173185, T Hasan. This page was last edited on 19 January 2023, at 00:36. Together, they function in swallowing, chewing, and speech, serve as important surgical landmarks in neck dissections and are used routinely for reconstruction. Anne Asher, ACE-certified personal trainer, health coach, and orthopedic exercise specialist, is a back and neck pain expert. What muscle(s) serves as an antagonist to the biceps? E. Scalenes. bones serve as levers. What experience do you need to become a teacher? Synergist: Supinator, Action: Abducts and extends thumb A. Vastus medialis B. Adductor magnus C. Rectus femoris D. Iliacus E. Sartorius.