sternocleidomastoid synergist and antagonist sternocleidomastoid synergist and antagonist

Antagonist: Flexor carpi radialis Strap-like; e.g., sternocleidomastoid Or: [3][4] The sternocleidomastoid is thick and narrow at its centre, and broader and thinner at either end. Antagonist: internal intercostals A. sternocleidomastoid muscles B. scalene muscles C. pectoralis major D. masseter, Which muscle is directly superior to the trapezius? We therefore modeled the effects of drug . This website uses cookies to improve your experience while you navigate through the website. (I bought one thing for Dad. The muscle that is contracting is called the agonist and the muscle that is relaxing or lengthening is called the antagonist. Synergist: trapezius, Action: extends or hyperextends head 9th - 12th grade. Antagonist: deltoid An aponeurosis is a broad flat expanse of tendon. The sternocleidomastoid muscles flex the neck and the splenius cervicis muscles extend it. Examination of the sternocleidomastoid muscle forms part of the examination of the cranial nerves. MedlinePlus, U.S. National Library of Medicine. Which of the following muscles is a rotator cuff muscle? antagonist: gluteal muscles, adductor muscles, tensor fascia latae, synergist: adductor muscles, gracilis Lateral surface of the mastoid process through a strong tendon, and to the lateral half of superior nucheal line through an aponeurosis. Verywell Health's content is for informational and educational purposes only. However, you may visit "Cookie Settings" to provide a controlled consent. This website uses cookies to improve your experience while you navigate through the website. What experience do you need to become a teacher? shotty's jello shots vegan; stephanie cartel crew before surgery; what does not retained mean on job application; new restaurants coming to jacksonville nc 2022 Antagonist: pronator teres 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. Antagonist: Flexor carpi radialis superficial Moore, Keith, L., Dalley, Arthur, F. Clinically Oriented Anatomy. Sternal Head:Upper part of the anterior surface of the manubrium Antagonist: tensor fascia latae Lower: Levator Scapulae. A. Sternocleidomastoid. This cookie is set by GDPR Cookie Consent plugin. Which of the following muscles is most active during medial rotation of the arm? It is sometimes also called the "prime mover". a. rhomboid major b. rhomboid minor c. trapezius d. serratus anterior, Which of the following posterior muscles is associated with shoulder joint adduction, extension, internal rotation, and horizontal abduction? Antagonist: Temporalis B. blasphemy 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. 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. Which of the following muscles is primarily a postural muscle? Sternocleidomastoid (anterior fibers) 2. a) sternocleidomastoid b) orbicularis oculi c) trapezius d) platysma, Which muscle acts to anchor the scapula? a) trapezius b) levator scapula c) serratus anterior d) latissimus dorsi. The fibers from the accessory nerve nucleus travel upward to enter the cranium via the foramen magnum. antagonist: tensor fasciae latae, gluteal minimus, and medius muscles, synergist: adductor muscles and gracilis Is this considered flexion or extension? Other functions of the SCM include assisting in breathing, maintaining neck posture, and helping the temporomandibular joint (TMJ) function. Protrusion-Retrusion involves the movements of _______ muscle. Synergist: NA, Action: Only flexor of distal phalanges Enterta[in]ing as I do, the most confident hope of succeeding in a voyage which had formed a (7) da[r]ling project of mine for the LAB 5 Muscle I Axial Muscular System Objectives: To know the primary functions of the muscular system. The Anatomy of the Brachiocephalic Artery, Superficial Layer of the Intrinsic Back Muscles, Causes of Collarbone Pain and Treatment Options, Hamstring Muscles: Anatomy, Function, and Common Injuries, spinal accessory nerve (cranial nerve 11), Anatomy, head and neck, sternocleidomastoid muscle. To identify the relationship between bones and skeletal muscles in producing movement. indirect object. Synergist: Platysma, Action: Flexes neck forward when together In the Middle Ages, when the Catholic Church was all-powerful, a(n) (a) latissimus dorsi (b) pectoralis major (c) rhomboid (d) subclavius (e) trapezius. Coming back to Los Angeles, however, they werearriving(4)\overset{\text{(4)}}{{\underline{\text{were arriving}}}}werearriving(4) at a time three and one-half hours earlier than when they left Sydney. Which of the following muscles is completely superficial? sternocleidomastoid synergist and antagonist Extension of the head and cervical spine when posterior fibers act bilaterally, 2. Unilaterally: Rotation of head to the opposite side, lateral flexion of the neck on the same side Sternocleidomastoid. 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 is a . Synergist: pectineus, Action: Hip flexor antagonist: adductor group, rectus femoris, synergist: gluteal minimus and tensor fasciae latae The Sternocleidomastoid is an anterior muscle of the neck. [2] Itprotects the vertical neurovascular bundle of neck, branches of cervical plexus, deep cervical lymph nodes and soft tissues of neck from damage[2], Image: Sternocleidomastoid muscle (highlighted in green) - anterior view[3], This 2 minute video is a good summary of the sternocleidomastoid muscle. Antagonist: extensor carpi ulnaris When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. The supraclavicularis muscle arises from the manubrium behind the sternocleidomastoid and passes behind the sternocleidomastoid to the upper surface of the clavicle. (a) What muscles make up the rotator cuff? A. prime mover (agonist) B. antagonist C. synergist D. fixator E. origin F. insertion, Which muscle extends the elbow? Synergist: psoas, Action: adducts thigh (a) sternocleidomastoid (b) splenius capitis (c) semispinalis cervicis (d) scalenus anterior. c) pectoralis major. What was the "gag rule" passed by the House of Representatives in 1836? Synergist: NA, Action: Pronates forearm The Wellness Digest's content is for informational purposes only. 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. 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. (b) The glenohumeral joint allows for movement in which dimensions? skeletal muscle is attached to bone at origin and insertion. Synergist: Action: stabilizes pelvis Why did medieval Europe's attitudes toward Jews change? Acetylcholine (ACH) is released from vesicles and is sent over the synaptic cleft to receptors on the postsynaptic bulb. b) masseter. Action: Pulls ribs forward Studies report that morphometric and cross-sectional area a-symmetry between SCM of two sides result from unequal growth in utero and play an important role in the genesis of tension type headache. This page was last edited on 19 January 2023, at 00:36. 2023 Dotdash Media, Inc. All rights reserved. When refering to evidence in academic writing, you should always try to reference the primary (original) source. Contraction of the muscle gives rise to a condition called torticollis or wry neck, and this can have a number of causes. This can cause atrophy (shrinking) in the affected SCM and may cause difficulty in turning the head and bending the neck. Antagonist: external intercostals F. edifice (d) Segmental branches. Muscles Testing and Function with Posture and Pain. The party are in excellent health and sperits, zealously attached to the enterprise, and anxious to proceed; not a whisper or murmur or discontent to be heard among them, but all act in unison, and with the most perfict harmony. Some authors regard such fusions to be a normal developmental feature , due to their common derivation from the post- sixth branchial arch. The SCM continues on to attach to the mastoid bone. Philadelphia: Lea and Febiger, 1918; Bartleby.com, 2000. Action: When it is acting superiorly, it elevates the 1st rib as in the process of inhalation; inferiorly, assists in flexion and rotation of the neck. a. Pectoralis major b. Serratus anterior c. Supraspinatus d. Teres major. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. Just check all flip PDFs from the author ibed_guidance. Furthermore, they are components of the boundaries of the submental and submandibular triangles of the neck. Unilaterally- Laterally Flex the head and neck, rotate. Lippincott, Williams and Wilkins. Physiopedia articles are best used to find the original sources of information (see the references list at the bottom of the article). antagonist: hamstring muscles, synergist: adductor muscles, gracilis The two heads are separated from one another at their origins by a triangular interval (lesser supraclavicular fossa) but gradually blend, below the middle of the neck, into a thick, rounded muscle which is inserted, by a strong tendon, into the lateral surface of the mastoid process, from its apex to its superior border, and by a thin aponeurosis into the lateral half of the superior nuchal line of the occipital bone. Antagonist: gluteus maximus chest press -> rotator cuff Antagonist . Antagonist: Soleus Antagonist: Flexor carpi radialis e) latissimus dorsi. Get Top Tips Tuesday and The Latest Physiopedia updates, The content on or accessible through Physiopedia is for informational purposes only. These cookies do not store any personal information. Top Contributors - Venus Pagare, Admin, Kim Jackson, Joao Costa, Daniele Barilla, WikiSysop, Joshua Samuel, Evan Thomas, Tarina van der Stockt and Lucinda hampton, Sternocleidomastoid (SCM) (synonym musculus sternocleidomastoideus)is a paired superficial muscle in the anterior portion of the neck. Contralateral rotation of the head and cervical spine when acting unilaterally. Antagonist: Sartorious What is the synergist muscle for sternocleidomastoid? Antagonist: diaphram a) Clavicle b) Cervical vertebrae c) Scapula d) Sacrum. a. triceps brachii b. pronator quadratus c. adductor pollicis d. flexor carpi radialis e. abductor pollicis brevis, Which of the following muscles is a lateral rotator of the arm? Which of the following muscles is most active during extension of the arm/glenohumeral joint? (a) abductor pollicis longus (b) anconeus and triceps brachii (c) biceps brachii and supinator (d) extensor carpi ulnaris (e) flexor digitorum profundus. Synergist: supraspinatus, Action: Pulls shoulders medially They cause formation of supernumerary lesser supraclavicular fosse. Michael Menna, DO, is a board-certified, active attending emergency medicine physician at White Plains Hospital in White Plains, New York. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. A synergist that makes the insertion site more stable is called a fixator. Synergist: Tibialis anterior, Action: Stabilizes trunk a. Biceps brachii b. Triceps brachii c. Jaw d. Tongue. antagonist: tensor fasciae latae, gluteal minimus, medius muscles, synergist: gastrocnemius . (a) Auricular. 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. The longus colli is a deep cervical flexor acting as an important synergist with the sternocleidomastoid muscle. 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. Six heads of origin of sternocleidomastoid muscle: a rare case. Synergist: Extensor carpi radialis longus, Action: Extends and adducts wrists antagonist; erector spinae, synergist: hamsting muscles Synergists (Neutralizers): Muscles that contract to assist the prime movers, either by: adding force to the movement and making it more refined Or . The infrahyoid muscles are also part of a . Sternocleidomastoid. The occurrence of such a variation can be explained by fusion failure or abnormal mesodermal splitting during development. The sternocleidomastoid is the prime mover and the splenius cervicis is the synergist. Platysma - single sheetlike; covers anterolateral neck; Sternocleidomastoid - paired muscle; PRAYER MUSCLE a) Zygomaticus major b) Digastric c) Sternohyoid d) Depressor anguli oris. To define the origin, insertion, and belly of a skeletal muscle. a. Anterior deltoid b. The upper fibers are syndergistic with the sternocleidomastoid in head and neck movements and through its rotation of the scapula during glenohumeral movement is an essential part of the "scapulohumeral" rhythm. Which of the following groups of muscles does not move the vertebral column? What are various methods available for deploying a Windows application? On either side, the SCM diagonally divides the neck musculature into anterior (front) and posterior (back) triangles. antagonist: erector spinae, synergist: external oblique, rectur abdominis The deep muscles of the neck, levator scapulae and middle scalene muscle are supplied by which nerve? _____ was likely to be burnt at the stake. 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: Learn the definition of an antagonist muscle and understand how it differs from an agonist muscle. 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). Some images used in this set are licensed under the Creative Commons through Flickr.com.Click to see the original works with their full license. Describe the relationship between bones and skeletal muscles in the production of body movements. Antagonist: adductor mangus A) Coracobrachialis B) Tricep Brachi C) Latissimus dorsi D) Pectoralis major E) Supraspinatus, Which of the following muscles is an important elevator of the scapula? Synergist: Gastrocnemius, Action:Flexes big toe [5][6] It supplies only motor fibres. Click to see the original works with their full license. Recognizing Compound Indirect Objects. Antagonist: deltoid What muscle is behind the sternocleidomastoid? [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. Antagonist: Biceps femoris 2 What are synergist muscles? Save. antagonist: triceps brachii, synergist: biceps brachii Which muscle acts as an antagonist to trapezius? Which of the following muscles is part of the rotator cuff? Muscles. Such cases represent the developmental defect of muscular agenesis and are diagnosed by Ultrasound or Magnetic Resonance Imaging scans. It is shown that localized muscle pain can reorganize the EMG activity of synergists where no pain is present, and this findings may have implications for the understanding of manifestations seen in relation to painful musculoskeletal disorders. Antagonist: Gracilis Synergist: teres major, Action: Lateral rotation of humerus It was concluded that acute muscle pain is unable to maintain longerlasting resting muscle hyperactivity. Middle: Pectoralis minor, serratus anterior 5th Edition. The cookies is used to store the user consent for the cookies in the category "Necessary". Play this game to review undefined. A few fibers of the SCM insert at the bottom of the. Differentiate between: a. Muscles that Act on the Scapula . This article incorporates text in the public domain from page 390 ofthe 20th edition of Gray's Anatomy (1918). Etymology and location [ edit] The sternocleidomastoid muscles (SCM) help with functions such as head rotation, head tilt, pointing the chin toward the breastbone, and more. Antagonist: Biceps brachii a. teres major b. infraspinatus c. latissimus dorsi d. subscapularis, Which of the following muscles does not exert a force on the upper extremity during contraction? English Edition. However, there are many common except ions end ing with -nse, such as suspense. The SCM becomes chronically shortened in cases of torticollis. [3] It also flexes the neck. In this situation, the SCM also turns the face upward just a little, adding in a bit of neck extension. They act to extend the spine, bending it backwards. In the case of the sternocleidomastoid muscle, it is innervated by the accessory nerve (cranial nerve XI). The Internet Journal of Human Anatomy 2010. KenHub. Sternocleidomastoid: a) used in chewing b) muscle of head or neck c) mandible d) cranium e) atlas f) muscle that move upper extremity g) suicide bags h) epiphysis i) cutaneous j) muscle that move lower extremity. Synergist: Scalenes, Action: elevates hyoid bone d) biceps brachii. Synergist: palmaris longus, Action: Tenses skin & fascia of palm Which of the following muscles is (only) responsible for scapular protraction and upward rotation? As they ascend, the CH spirals behind the SH and blends with its deep surface below the middle of the neck, forming a thick rounded belly. The manubrium is the uppermost section of the breastbone. When you take a deep bow, which of the following muscles do you use? Get access to this video and our entire Q&A library. Which muscle acts as a synergist with pectorals minor during abduction of the scapula? The SCM inserts behind the ear at the mastoid process, a projection of the. The splenius captis is located on the lateral side of the C7. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. How did the United States respond to Jewish refugees after Kristallnacht? The positive effects of physical activity and exercise on almost all functions of the human body are widely acknowledged. The sternocleidomastoid muscles help to flex the neck. c) medial pterygoid. The internal carotid artery to reach both the sternocleidomastoid muscles and the trapezius. Lateral flexion of the head and cervical spine when acting unilaterally Treatment of a shortened SCN involves gentle stretching of a tight SCM muscle to lengthen it to a normal shape. B. Abdominal. supraclavicularis muscle b. Quadratus lumborum. The sternocleidomastoid muscles (SCM) help with functions such as head rotation, head tilt, pointing the chin toward the breastbone, and more. Synergist: teres minor, Action: Lifts ribs Which of the muscles is involved in the pronation of the forearm? Synergist: pectineus, Action: extends knee During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. You also have the option to opt-out of these cookies. Antagonist: Digastric Which muscle acts as an agonist with the teres minor during lateral rotation of the shoulder? c) levator palpebrae superioris. Variations Of The Sternocleidomastoid Muscle: A Literature Review. as a prime mover contracts the according to the size and function of the mus- antagonist progressively relaxes, . Synergist: Pronator teres, Action: Extends and abducts wrist The SCMs on each side of your body course from the breastbone and collar bone in the upper part of the chest to the back of the head. 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. 3 months ago. Synergist: pectoralis major, Action: Flexes wrist and middle phalanges Sternocleidomastoid --- Splenius Capitis Preview this quiz on Quizizz. a. Levator scapulae b. Pectoralis minor c. Rhomboid d. Serratus anterior e. Trapezius. Middle Fibers: elevation, upward rotation and adduction of the scapula. are found Synergists prevent movement ot the inter-in the large trunk and thigh muscles, . A contraction of both SCM muscles can flex your neck, which brings your chin down in the direction of your breastbone. Synergist: flexor carpi ulnaris, Action: adducts hand a) Biceps brachii muscle b) Pronator teres c) Flexor carpi radialis d) Brachialis. Available from: T Hasan. The major muscles of the neck include the semispinalis capitis, splenius capitus, levator scapulae, scalenes, trapezius, sternohyoid, onohyoid, and the sternocleidomastoid. Scalenes, opposite side of splenius capitis, Anterior,Medial, and Posterior Transverse Processes of the Cervical Vertabrae, Bilaterally: Elevate the ribs during Inhalation (ALL), Posterior neck muscles/ extensors opposite scalenes, External occipital protuberance, medial portion of superior nuchal line of the occiput. Synergist: deltoid, Action: lateral rotation of humerus This muscle binds the skull to the sternum and clavicle. Antagonist: pectoralis major Kapandji, I.A., "The Physiology of the Joints". a. Levator scapulae b. Pectoralis minor c. Rhomboid d. Serratus anterior e. Trapezius, Which of the following muscles is a rotator cuff muscle? A. Vastus medialis B. Adductor magnus C. Rectus femoris D. Iliacus E. Sartorius. Antagonist: Extensor carpi ulnaris a. Pectoralis minor b. Subscapularis c. Rhomboid d. Trapezius, Which of the following muscles has two heads? Synergist: serratus anterior, Action: Moves scapula towards chest wall a) orbicularis oris b) platysma c) orbicularis oculi d) sternocleidomastoid, What muscle is directly lateral to the sternohyoid? Synergist: gluteus maximus, Action: extends knee and stabilizes it Physiopedia is not a substitute for professional advice or expert medical services from a qualified healthcare provider. Torticollis gives the appearance of a tilted head on the side involved. Antagonist: Brachioradialis Synergist: Abductor pollicis longus, Action: forearm flexor a. Abductor pollicis brevis b. Opponens pollicis c. Flexor pollicis brevis d. Extensor pollicis longus, Which of the following muscles is (only) responsible for scapular protraction, downward rotation, and depression? It is partially covered by the gluteus maximus. synergist and antagonist musclesnixon high school yearbooks synergist and antagonist muscles. It also acts as an accessory muscle of respiration, along with the scalene muscles of the neck. H. erroneous 3 What is the antagonist muscle in elbow flexion? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". a. splenius cervicis b. latissimus dorsi c. trapezius (upper fibers) d. serratus anterior e. teres major. Antagonist: Digastric (a) biceps brachii (b) triceps brachii (c) jaw (d) tongue. Which of the following muscles produces the main flexion of the elbow? a) Splenius capitis b) Semispinalis capitis c) Sternocleidomastoid d) Trapezius, What are attachments for these muscles, and their functions? (a) the erector spinae (b) the rhomboid group (c) the splenius group (d) the scalenes (e) the transversospinalis. a) biceps femoris b) brachioradialis c) triceps brachii d) pectoralis major e) deltoid. Synergist: flexor pollicis longus, Action: abducts hand Antagonist: Flexor carpi ulnaris What is the relationship between these muscles when bowing your head? E. The. Synergist: Masseter, Action: Wrinkles chin a) Flexor pollicis longus b) Vastus medialis c) Rectus femoris d) Soleus e) Gluteus maximus, Which of the following elbow flexor muscles is also a forearm supinator? The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. Antagonist: sternocleidomasteoid a. platysma b. occipitalis c. sternohyoid d. mylohyoid. A. Frontalis B. Lateral rectus C. Sternocleidomastoid D. Masseter E. Hyoglossus, Which of the muscles listed below initiates movement at the talocrural (ankle) joint? Frowning (antagonist of zygomaticus) Orbicularis oris Indirectly from maxilla/mandible, fibers blend. Many actions in the body do have one muscle that is responsible for more of the work in that action than any other muscle. 1 : an agent that increases the effectiveness of another agent when combined with it; especially : a drug that acts in synergism with another. Upload your PDF on PubHTML5 and create a flip PDF like Seeleys essentials of anatomy physiology ( etc. 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 copyright 2003-2023 Homework.Study.com. a) gluteus medius. Torticollis is a movement disorder in which the head is persistently turned to one side. Which of the following muscles performs cervical extension only? A. Biceps brachii B. Brachialis C. Brachioradialis D. Triceps brachii, Which of the following muscles provides the greatest contribution to lateral rotation of the shoulder joint? ibed_guidance published Seeleys essentials of anatomy physiology ( etc.) c) brachialis. The International Date Line lays(8)\overset{\text{(8)}}{{\underline{\text{lays}}}}lays(8) between two time zones in the Pacific Ocean. The Internet Journal of Human Anatomy, 2010, Kaur D et al. 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. These cookies track visitors across websites and collect information to provide customized ads. Synergist: rectus femoris, Muscles of the Forearm & Hand(Bio 107: Anatom, Head and Neck Muscles - Action, Antagonist, S, Muscles of the Forearm That Move Wrist, Hand, Byron Almen, Dorothy Payne, Stefan Kostka, Eric Hinderaker, James A. Henretta, Rebecca Edwards, Robert O. Self, By the People: A History of the United States, AP Edition. Which of the following muscles supinates the forearm? Churchill Livingstone. Synergist: Extensor hallucis longus, Action: Extends big toe 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: Latissimus dorsi The sternocleidomastoid muscle originates from two locations: the manubrium of the sternum and the clavicle. The muscle that is contracting is called. New York. Sternocleidomastoid Antagonists: Same muscles on the contralateral side Semispinalis capitis Semispinalis cervicis Multifidus Sternocleidomastoid Anterior scalene, middle scalene, the rotatores, and longus colli (inferior oblique) assist with contralateral rotation of the head and cervical spine. Which of the following muscle is most active during the abductive of the arm? What is the function of the sternocleidomastoid muscles? a. Longissimus. Synergists and Antagonists Synergists - are groups of muscles working together to cause movement You also have the option to opt-out of these cookies. antagonist: tibialis anterior, synergist: hamstring muscles, gracilis, gastrocnemius, sartorius antagonist: trapezius, latissimus dorsi, rhomboids, pectoralis major, antagonist: biceps brachii and brachialis, synergist: brachialis Which of the following muscles is responsible for elevating the eyebrows? The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. Drug combinations may exhibit synergistic or antagonistic effects. Antagonist: tensor fascia latae 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. Some larger muscles are labeled. Sternocleidomastoid (SCM) muscle pain in the neck typically results from muscle tension or performing repeated motions. Synergist: infraspinatus, Action: stabilizes scapula Their antagonists are the muscles. C. Diaphragm. synergist: sternocleidomastoid, rhomboids supraspinatus synergists: middle deltoid and infraspinatus antagonist: pectoralis major, latissimus dorsi, teres major antagonist muscle that opposes the action of an agonist extension an increase in joint angle with movement fixator synergist that assists an agonist by preventing or reducing movement at another joint, thereby stabilizing the origin of the agonist flexion a decrease in joint angle with movement insertion These cookies will be stored in your browser only with your consent. For beginning and intermediary anatomy . In most cases Physiopedia articles are a secondary source and so should not be used as references. The movement of troponin and tropomyosin is key in facilitating the myosin head to move along the thin filament, resulting in a contraction of the sternocleidomastoid muscle. Synergist: adductor longus, Action: adducts, flexes and medially rotates thigh There are reports of a broad clavicular head splitting into multiple small muscular slips. Antagonist: Scalenes (a) Teres major (b) Supraspinatus (c) Biceps brachii (d) Brachialis (e) Pectoralis major.