sternocleidomastoid synergist and antagonist10 marca 2023
Internet Journal of Medical Update 2013; 8(2):62-64, Sternocleidomastoid muscle (highlighted in green) - anterior view image - Kenhub, Sternocleidomastoid muscle video - Kenhub, Gray, Henry. The manubrium is the uppermost section of the breastbone. Read the entire passage once to get a general idea of what it is about. d. Splenius. Synergist: Gluteus maximus, Action: Medially rotates leg at thigh a) Depressor anguli oris b) Mentalis c) Depressor labii inferioris d) Platysma e) Masseter, Which of the following muscles has superior, middle and inferior sections? This cookie is set by GDPR Cookie Consent plugin. Antagonist: Triceps This tent is in the Indian stile formed of a number of (8) dressed Buffaloe skins sewed together with sinues. a. Subscapularis b. Pectoralis major c. Infraspinatus d. Supraspinatus e. Latissimus dorsi, Which of the following muscles is attached to the medial border of the ventral surface of scapula : a-levator scapula b-rhomboides minor c- rhomboides major d-serratus anterior, Which of the following intrinsic muscles of the hand do not make up the thenar eminence? These cookies will be stored in your browser only with your consent. 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 Synergist: supraspinatus, Action: Pulls shoulders medially Clark myself the two Interpretters and the woman [Sacajewea] and the child sleep in a tent of dressed skins. (a) abductor pollicis longus (b) anconeus and triceps brachii (c) biceps brachii and supinator (d) extensor carpi ulnaris (e) flexor digitorum profundus. 11 times. Lippincott, Williams and Wilkins. b) orbicularis oris. Origin: Synergist: Gastrocnemius, Action: Flexes toes Antagonist: adductor mangus The world divides(7)\overset{\text{(7)}}{{\underline{\text{divides}}}}divides(7) into 242424 time zones so that the sun is high in the sky at noon almost everywhere on earth. It does not store any personal data. The frequency of cleido-occipital muscle occurrence has been reported up to 33%. The SCM runs diagonally from both the collarbone and the breastbone to the back of the ear. Scalene Muscle Group Synergist: Sternocleidomastoid, Longus colli and capitis Antagonist: Gracilis It is also known as SCM or Sternomastoid or Sterno muscle. a) Sternocleidomastoid b) Gastrocnemius c) Gluteus maximus d) Flexor carpi radialis e) None of the above; 1. The supraclavicularis muscle arises from the manubrium behind the sternocleidomastoid and passes behind the sternocleidomastoid to the upper surface of the clavicle. 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. Necessary cookies are absolutely essential for the website to function properly. Antagonist: extensor carpi ulnaris Unilaterally: Rotate the vertebral column, Lab 17 & 18 Action, Synergist, Antagonist, Head and Neck Muscles - Action, Antagonist, S, Byron Almen, Dorothy Payne, Stefan Kostka, The Language of Composition: Reading, Writing, Rhetoric, Lawrence Scanlon, Renee H. Shea, Robin Dissin Aufses, John Lund, Paul S. Vickery, P. Scott Corbett, Todd Pfannestiel, Volker Janssen, 1103 - Ch 5: Muscles of the Head, Neck & Face, Micro Exam Chapter 6/7/9 and Chart of Names (. The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. Which of these muscles is located on the ventral (anterior) side of the body? Extension of the head and cervical spine when posterior fibers act bilaterally, 2. Antagonist: Biceps brachii (a) latissimus dorsi (b) pectoralis major (c) rhomboid (d) subclavius (e) trapezius. Synergist: palmaris longus, Action: Tenses skin & fascia of palm Flexion of the head and cervical spine when anterior fibers act bilaterally, 3. 1 Definition. Along the muscle fibers are t-tubule openings which facilitate the spread of the action potential into the muscle fibers. d) lateral pterygoid. C. Diaphragm. What is the synergist muscle for sternocleidomastoid? Definition The gluteus medius is one of four superficial gluteal muscles that allow a broad range of movement in the hip joint. The cookie is used to store the user consent for the cookies in the category "Other. Which of the following muscles is completely superficial? D. The sternocleidomastoid is the fixator and the splenius cervicis is the prime mover. 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 as a prime mover contracts the according to the size and function of the mus- antagonist progressively relaxes, . The SCM is a unique muscle, in terms of variations at its origin.4,5,6 Also, it has a variable innervations arrangement, the classical anastomotic pattern being observed in 50% of the cases.These anatomical details have a pivotal role in the planning of pedicle muscle flaps in reconstructive surgeries. Which muscle depresses the clavicle and stabilizes the pectoral girdle? skeletal muscle contracts and pulls on bone. By clicking Accept All, you consent to the use of ALL the cookies. Share and download Seeleys essentials of anatomy physiology ( etc.) (a) Deltoid (b) Teres major (c) Infraspinatus (d) Coracobrachialis (e) Trapezius. Such cases represent the developmental defect of muscular agenesis and are diagnosed by Ultrasound or Magnetic Resonance Imaging scans. Synergist: pectoralis major, Action: medial rotation of shoulder When both SCM muscles contract, the movements can include: Simultaneous bilateral SCM muscle contraction also plays a role in the breathing process. It is sometimes also called the "prime mover". antagonist: triceps brachii, synergist: biceps brachii Treatment of a shortened SCN involves gentle stretching of a tight SCM muscle to lengthen it to a normal shape. I bought Dad^a screwdriver set for Christmas. Which of the following muscles is responsible for elevating the eyebrows? Synergist: serratus anterior, Action: Moves scapula towards chest wall . e) latissimus dorsi. antagonist: trapezius, latissimus dorsi, rhomboids, pectoralis major, antagonist: biceps brachii and brachialis, synergist: brachialis To define the origin, insertion, and belly of a skeletal muscle. Antagonist: pectoralis major The supraspinatus and infraspinatus muscles have the main part of their body attached to which of the following bone? M. lavish [3][4] The sternocleidomastoid is thick and narrow at its centre, and broader and thinner at either end. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. 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. 3 months ago. For example, the scalenes are synergist muscles to the sternocleidomastoids (SCM), because they help with turning and tilting the head and neck. [2] It protects the vertical neurovascular bundle of neck, branches of cervical plexus, deep cervical lymph nodes and soft tissues of neck from damage [2 . Sternocleidomastoid (Action, Synergist, Antagonist, BodyBuilder (Y/N)) Action: Flexes or Rotates the Head Synergist: N/A Antagonist: N/A BodyBuilder: Yes . a) Zygomaticus major b) Digastric c) Sternohyoid d) Depressor anguli oris. Their antagonists are the muscles. process of using agonist and synergist to dynamically move the joint into range of motion. What muscle is behind the sternocleidomastoid? Study with Quizlet and memorize flashcards containing terms like Buccinator Synergist, Buccinator Antagonist, Frontalis Antagonist and more. Antagonist: gastrocnemius Synergist: Trapezius, Action: prime mover of inspiration Antagonist: diaphram Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. roberta snider hartville ohio obituary la dissolution est une transformation chimique ou physique i would appreciate any feedback you can provide carbon nation tribe . The superficial layer includes sternohyoid and omohyoid, while the deep layer is made up of sternothyroid and thyrohyoid. Churchill Livingstone. testreviewer. The antagonist of the splenius capitis muscle is the Sternocleidomastoid. Unilaterally: contralateral cervical rotation, ipsilateral cervical flexion Working with a physical therapist can be a useful modality to strengthen the SCM if it has been injured or weakened. Synergist: Pectoralis major Antagonist: Spino-deltoid. Describe how the prime move Antagonist: sternocleidomasteoid Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Antagonist: Sartorious Bilaterally: Extend head and neck We describe the main muscle that does an action as the agonist. The clavicular origin of the sternocleidomastoid varies greatly: in some cases the clavicular head may be as narrow as the sternal; in others it may be as much as 7.5 millimetres (0.30in) in breadth. skeletal muscle is attached to bone at origin and insertion. An impairment or injury to the spinal accessory nerve can cause weakness or paralysis to the SCM. The sternocleidomastoid muscles help to flex the neck. Synergist: Gastrocnemius, Action: Prime mover of dorsiflexion to invert foot To explain skeletal muscle movements as activities of agonists (prime movers), antagonists, and synergists. Sternocleidomastoid. The sternocleidomastoid muscle has a cylindrical, strap-like shape that emerges from the side of your neck and tapers at the ends. For example, the agonist, or prime mover, for hip flexion would be the iliopsoas. In the space at the left, write the letter of the pair of words related to each other in the same way as the capitalized pair. A. biceps brachii B. brachialis C. brachioradialis D. triceps brachii, Which of the following muscles is a developmentally dorsal muscle of the upper limb? Benign fibrosis, hypoplasia or aplasia of SCM is the most common cause of congenital torticolis. It also acts as an accessory muscle of respiration, along with the scalene muscles of the neck. Synergist: Gracilis, Action: Prime mover of foot inversion Analytical cookies are used to understand how visitors interact with the website. Origin vs. insertion b. Intrinsic vs. extrinsic c. Agonist vs. antagonist 2. Synergists (Neutralizers): Muscles that contract to assist the prime movers, either by: adding force to the movement and making it more refined Or . a. Pectoralis minor b. Subscapularis c. Rhomboid d. Trapezius, Which of the following muscles has two heads? Synergist: NA, Action: Planatar flexion when knee is extended How did the United States respond to Jewish refugees after Kristallnacht? The two heads are separated by a triangular surface depression, the lesser supraclavicular fossa. Antagonist: infraspinatus Correct answer-short muscles: upper traps, sternocleidomastoid, lattismus dorsi, teres major, pec major/minor long muscles: rhomboids, mid traps, lower traps, . The antagonist of the splenius capitis muscle is the Sternocleidomastoid. 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. e) platysma. sternocleidomastoid synergist and antagonist [medical citation needed]. Antagonist Muscles On the opposite side of the body from the multifidus and erector spinae are the abdominal muscles. Synergist: NA, Action: Forearm supinator The ACH causes the resting potential to increase above -55mV, thus initiating an action potential which travels along the muscle fiber. Synergist: Biceps brachii, Action: Pronates forearm The sternocleidomastoid is innervated by the accessory nerve. Just check all flip PDFs from the author ibed_guidance. antagonist: tibialis anterior, synergist: hamstring muscles, gracilis, gastrocnemius, sartorius Meanwhile, a muscle with the opposite action of the prime mover is called an antagonist. a) Splenius capitis b) Semispinalis capitis c) Sternocleidomastoid d) Trapezius, What are attachments for these muscles, and their functions? (a) What muscles make up the rotator cuff? A. rectus abdominis B. transversus abdominis C. erector spinae D. latissimus dorsi. They assist the SCM in turning and tilting both the head and neck. Which muscle acts as a synergist with pectorals minor during abduction of the scapula? Sternocleidomastoid muscle 32 languages The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. The platysma muscle is a superficial muscle of the human neck that overlaps the sternocleidomastoid. 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. This category only includes cookies that ensures basic functionalities and security features of the website. (a) Biceps brachii (b) Latissimus dorsi (c) Pectoralis major (d) Subscapularis. Torticollis. It was concluded that acute muscle pain is unable to maintain longerlasting resting muscle hyperactivity. Other functions of the SCM include assisting in breathing, maintaining neck posture, and helping the temporomandibular joint (TMJ) function. Longissimus capitis is the part of the longest muscle of the neck, which serves to rotate the head from side to side and extend the head. Kendall, Florence Peterson, McCreary, Elizabeth Kendall, and Provance, Patricia Geise. Lower: Serratus anterior, pectoralis minor, spine extensors, Upper: Rhomboids, neck flexors Synergist: NA, Action: rotates and adducts scapula Antagonist: Digastric 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. 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 _____. Sternocleidomastoid --- Splenius Capitis. Synergist muscles work along with agonist muscles to create motion analogous to or in conjunction with agonist muscles, allowing for a wide range of conceivable motions. Which of the following muscles is a rotator cuff muscle? Fifth Edition. Antagonist: Psoas Read the flipbook version of Seeleys essentials of anatomy physiology ( etc.). Synergist: Splenius, Action: adducts and medially rotates arm Verywell Health's content is for informational and educational purposes only. Which of the following muscles acts to protract the mandible? 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? Synergist: Action: internal expiration by compressing ribs toward each other Philadelphia: Lea and Febiger, 1918; Bartleby.com, 2000. The muscle allows the head and vertebrae to extend. Middle: Adduct the scapula, stabilize the scapula The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. Upload your PDF on PubHTML5 and create a flip PDF like Seeleys essentials of anatomy physiology ( etc. Action: Rotates scapula so that its inferior angle moves laterally and upward; important in horizontal movements of arm (pushing and . Save. [2]. What is the relationship between these muscles when bowing your head? 2023 Dotdash Media, Inc. All rights reserved. J. heretic Which of the following muscles is most active during flexion of the arm/glenohumeral joint? The sternocleidomastoid muscles flex the neck and the splenius cervicis muscles extend it. Antagonist: Soleus This muscle binds the skull to the sternum and clavicle. The positive effects of physical activity and exercise on almost all functions of the human body are widely acknowledged. 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. antagonist: tibialis anterior, Muscles of the trunk - origin, insertion, act, NCLEX electrolyte imbalances & pharm tricks, Byron Almen, Dorothy Payne, Stefan Kostka, John Lund, Paul S. Vickery, P. Scott Corbett, Todd Pfannestiel, Volker Janssen, Eric Hinderaker, James A. Henretta, Rebecca Edwards, Robert O. Self, Muscular System (with Origin, Insertion, and. d) buccinator. Synergist: vastus lateralis, Action: extends knee Antagonist: Splenius Synergist: Platysma Sternocleidomastoid Action: Flexes neck forward when together Antagonist: Temporalis Synergist: Scalenes Flickr Creative Commons Images Some images used in this set are licensed under the Creative Commons through Flickr.com. What muscle(s) serves as an antagonist to the biceps? This muscle binds the skull to the sternum and clavicle. Antagonist: pectoralis major S, sternocleidomastoid: 7", trapezius; D, deltoid; . (a) Brachialis (b) Subscapularis (c) Teres minor (d) Supraspinous. These cookies track visitors across websites and collect information to provide customized ads. Synergist: pectoralis major, Action: Extends and medially rotates humerus 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. Muscles that work like this are called antagonistic pairs. Antagonist: external intercostals Antagonist: The signaling process to contract or relax the sternocleidomastoid begins in Cranial Nerve XI, the accessory nerve. Synergist: Psoas, Action: stabilizes pelvis a) gluteus medius. Synergist: Temporalis, Action: Closes jaw Synergist: NA, Action: Pronates forearm Middle: Pectoralis minor, serratus anterior d) biceps brachii. a) orbicularis oris b) platysma c) orbicularis oculi d) sternocleidomastoid, What muscle is directly lateral to the sternohyoid? Get Top Tips Tuesday and The Latest Physiopedia updates, The content on or accessible through Physiopedia is for informational purposes only. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. 5- 10 reps/ 1-2 seconds Dynamic Stretching . Abnormal head positioning in utero or difficult birth can lead to development of the compartment syndrome and congenital muscular torticollis sequela.Acquired SCM torticollis, can be post traumatic, myopathy induced, post infectious, drug induced, neurological or following sudden strenuous neck muscle activity. The Anatomy of the Sternocleidomastoid Muscle. The SCN can produce several different neck movements. The accessory nerve nucleus is in the anterior horn of the spinal cord around C1-C3, where lower motor neuron fibers mark its origin. 2 What are synergist muscles? This cookie is set by GDPR Cookie Consent plugin. E. The. Synergist: teres minor, Action: Lifts ribs New York. It also flexes the neck. Antagonist: Extensor digitorium longus a. Digastric b. Mylohyoid c. Omohyoid d. Sternocleidomastoid. Which of the following muscles produces the main flexion of the elbow? 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. What is the function of the sternocleidomastoid muscles? E. The sternocleidomastoid is the synergist and the splenius cervicis is the fixator. 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 b) gastrocnemius. Synergist: pectineus, Action: Hip flexor The thickness of the CH is variable. The splenius captis is located on the lateral side of the C7. Synergist: flexor digitorium superficialis, Action: Synergist to supinate arm Which muscle pulls the skin of the chin upward? The Sternocleidomastoid is an anterior muscle of the neck. StatPearls. 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 It also acts as an accessory muscle of inspiration. Drug combinations may exhibit synergistic or antagonistic effects. antagonist: tensor fasciae latae, gluteal minimus, medius muscles, synergist: gastrocnemius Many important structures relate to the sternocleidomastoid, including the common carotid artery, accessory nerve, and brachial plexus. Which of the following muscles flexes the neck? Contralateral rotation of the head and cervical spine when acting unilaterally. This condition when present in humans is considered to be a variation from normal. Synergist: Tibialis anterior, Action: Stabilizes trunk Antagonist: Sartorious In an antagonistic muscle pair, as one muscle contracts, the other muscle relaxes or lengthens. B), Which large muscle has an attachment on the external occipital protuberance and extends the neck? 3 What is the antagonist muscle in elbow flexion? Synergist: flexor pollicis longus, Action: abducts hand (b) Ansa cervicalis. Antagonist: Gluteus maximus English Edition. Physiopedia articles are best used to find the original sources of information (see the references list at the bottom of the article). 5th Edition. antagonist: tensor fasciae latae and gluteal muscles, synergist: hamstring muscles, gracilis, gastrocnemius, and sartorius chest press -> rotator cuff Antagonist . Torticollis is a movement disorder in which the head is persistently turned to one side. (a) diaphragm (b) triceps brachii (c) pronator teres (d) flexor carpi ulnaris (e) extensor indicis. Synergist: flexor carpi radialis, Action: Arm abduction Antagonist: Tensor fascia latae Occasionally, the SCM fuses with the trapezius, leaving no posterior triangle. I. gravity a. soleus b. tibialis anterior c. flexor digitorum longus d. gracilis e. extensor digitorum brevis, Which shoulder joint muscle is associated with humeral abduction, flexion, horizontal adduction, and internal rotation? By clicking Accept, you consent to the use of ALL the cookies. 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: tensor fascia latae antagonist: latissimus dorsi, pectoralis major (for adduction), synergist: teres major, pectoralis major, latissimus dorsi last ten years, I could but esteem this moment of my departure as among the most happy of my life. This website uses cookies to improve your experience while you navigate through the website. a. Levator scapulae b. Pectoralis minor c. Rhomboid d. Serratus anterior e. Trapezius, Which of the following muscles is the prime flexor of the arm at the shoulder joint? The infrahyoid muscles are also part of a . 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) They assist the SCM in turning and tilting both the head and neck. It covers the anterior surface of the neck superficially. Play this game to review undefined. Sternocleidomastoid is the most superficial and largest muscle in the front portion of the neck. They derive embryonically from the first and second pharyngeal arches. 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. (a) splenius capitis (b) semispinalis capitis (c) longissimus capitis (d) both (a) and (b) (e) all of the above. Is this considered flexion or extension? 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. 2 What muscle is behind the sternocleidomastoid? Antagonist: internal intercostals Advertisement Middle Trapezius Synergist: trapezius, Action: extends or hyperextends head The Wellness Digest's content is for informational purposes only. 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 . J. Ashton . However, they can be effectively utilized for muscle flap harvests. This muscle is innervated by the spinal accessory nerve (cranial nerve 11). Antagonist: Flexor carpi ulnaris 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? Which of the following muscles extends the head on the neck? Which of the following groups of muscles does not move the vertebral column? Sternal Head:Upper part of the anterior surface of the manubrium A. Brachialis B. Deltoid C. Triceps Brachii D. Brachioradialis E. Trapezius. Synergist: Scalenes, Action: elevates hyoid bone The information provided on this site is not a substitute for a physical consultation with a medical professional. The sternocleidomastoids (SCMs) are superficially located neck muscles that play an important role in tilting your head and turning your neck, as well as other movements. This article incorporates text in the public domain from page 390 ofthe 20th edition of Gray's Anatomy (1918). a. Pectoralis major b. Serratus anterior c. Supraspinatus d. Teres major. A contraction of both SCM muscles can flex your neck, which brings your chin down in the direction of your breastbone. Which muscles make up the common flexor tendon of the medial epicondyle? Antagonist: Palmaris longus Which muscle acts as an agonist with the teres minor during lateral rotation of the shoulder? The sternocleidomastoid muscles (SCM) help with functions such as head rotation, head tilt, pointing the chin toward the breastbone, and more. "offense, offence". The sternocleidomastoid is the prime mover and the splenius cervicis is the fixator. 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. Sternocleidomastoid --- Splenius Capitis Preview this quiz on Quizizz. All rights reserved. a) biceps femoris b) brachioradialis c) triceps brachii d) pectoralis major e) deltoid. The fibers from the accessory nerve nucleus travel upward to enter the cranium via the foramen magnum. b) triceps brachii. The Internet Journal of Human Anatomy 2010. A. Frontalis B. Lateral rectus C. Sternocleidomastoid D. Masseter E. Hyoglossus, Which of the muscles listed below initiates movement at the talocrural (ankle) joint? 3rd. Synergist: Quadriceps, Action: Plantar Flexion Synergist: pectineus, Action: extends knee Synergist: supinator, Action: Stabilizes wrist Muscles. O pectoralis major O latissimus dorsi O deltoid O biceps brachii, Protrusion-Retrusion involves the movements of which muscle?
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