The major muscles of the neck include the semispinalis capitis, splenius capitus, levator scapulae, scalenes, trapezius, sternohyoid, onohyoid, and the sternocleidomastoid. Verywell Health's content is for informational and educational purposes only. H. erroneous Fifth Edition. These cookies will be stored in your browser only with your consent. Rotation, retraction, elevation, and depression of scapula, serratus anterior muscle, Latissimus dorsi, Pectoralis Major. Edit. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. Kendall, Florence Peterson, McCreary, Elizabeth Kendall, and Provance, Patricia Geise. 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. copyright 2003-2023 Homework.Study.com. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. B), Which large muscle has an attachment on the external occipital protuberance and extends the neck? They may not cause any functional advantage or disadvantage in neck movement but might be physically interfering during invasive procedures. (a) Deltoid (b) Teres major (c) Infraspinatus (d) Coracobrachialis (e) Trapezius. antagonist: hamstring muscles, synergist: adductor muscles, gracilis 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. B. [5][6] It supplies only motor fibres. Antagonist: Digastric What muscle(s) serves as an antagonist to the biceps? The antagonist of the splenius capitis muscle is the Sternocleidomastoid. Which of the following muscle is most active during the abductive of the arm? Antagonist: deltoid 2 What are synergist muscles? The SCM muscle helps turn and bend your neck. [medical citation needed]. What is the antagonist muscle in elbow flexion? Synergist: Supinator, Action: Abducts and extends thumb Platysma - single sheetlike; covers anterolateral neck; Sternocleidomastoid - paired muscle; PRAYER MUSCLE Antagonist: Sartorious They act to extend the spine, bending it backwards. . Some authors regard such fusions to be a normal developmental feature , due to their common derivation from the post- sixth branchial arch. Sternocleidomastoid is the most superficial and largest muscle in the front portion of the neck. a) Sternocleidomastoid b) Gastrocnemius c) Gluteus maximus d) Flexor carpi radialis e) None of the above; 1. Synergist: Brachioradialis, Action: Extends thumb joint act as a fulcrum. A. E. Scalenes. testreviewer. 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. The muscle allows the head and vertebrae to extend. Antagonist: rhomboids are found Synergists prevent movement ot the inter-in the large trunk and thigh muscles, . Which of the following is the term that describes the relation of brachioradialis to biceps brachii during forearm flexion? 5- 10 reps/ 1-2 seconds Dynamic Stretching . We also use third-party cookies that help us analyze and understand how you use this website. Primary Actions of the Sternocleidomastoid. (b) Ansa cervicalis. Agonist is deltoid, antagonist is the latissimus dorsi. 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. Bordoni B, Varacallo M. Anatomy, head and neck, sternocleidomastoid muscle. Contraction of the muscle gives rise to a condition called torticollis or wry neck, and this can have a number of causes. 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. 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. Antagonist: Flexor carpi radialis The sternocleidomastoid muscle flexes the neck and helps with movement of the head. The signaling process to contract or relax the sternocleidomastoid begins in Cranial Nerve XI, the accessory nerve. Synergist or Antagonist DRAFT. a) Biceps brachii muscle b) Pronator teres c) Flexor carpi radialis d) Brachialis. Advertisement Middle Trapezius synergist: sternocleidomastoid, rhomboids supraspinatus synergists: middle deltoid and infraspinatus antagonist: pectoralis major, latissimus dorsi, teres major Synergist: Pronator teres, Action: Extends and abducts wrist It IS NOT medical advice. Middle deltoid c. Posterior deltoid d. Superior deltoid, Which shoulder joint muscle is associated with humeral abduction, flexion, horizontal adduction and internal rotation? Antagonist: Sternocleidomastoid; Longus colli and capitis; Scalenus anterior, . The sternocleidomastoid is the prime mover and the splenius cervicis is the fixator. a. Latissimus dorsi b. Rhomboid d. Trapezius d. Teres major. Synergist: deltoid, Action: lateral rotation of humerus (a) diaphragm (b) triceps brachii (c) pronator teres (d) flexor carpi ulnaris (e) extensor indicis. A. Pronator teres B. Flexor carpi radialis C. Brachioradialis D. Flexor carpi ulnaris E. Biceps brachii. on 2022-08-08. Synergist: Biceps brachii, Action: Pronates forearm Action: draws eyebrows together and inferiorly; wrinkles forehead vertically (frowning) Action: bilaterally- flexes & rotates lumbar region; compresses abdomen; unilaterally- trunk rotation and lateral flexion. You also have the option to opt-out of these cookies. for free. (a) Teres major (b) Supraspinatus (c) Biceps brachii (d) Brachialis (e) Pectoralis major. Synergist muscles help other muscles perform one or more functions. Synergist: pectineus, Action: extends knee Torticollis gives the appearance of a tilted head on the side involved. The SCN can produce several different neck movements. When you take a deep bow, which of the following muscles do you use? a. splenius cervicis b. latissimus dorsi c. trapezius (upper fibers) d. serratus anterior e. teres major. Bilaterally: cervical flexion, elevation of sternum and assists in forced inhalation. Which of the following muscles supinates the forearm? Physiopedia is not a substitute for professional advice or expert medical services from a qualified healthcare provider. antagonist; erector spinae, synergist: hamsting muscles What is the relationship between these muscles when bowing your head? To define the origin, insertion, and belly of a skeletal muscle. B. blasphemy Which of the following muscles extends the head on the neck? Synergist: pectoralis major, Action: Extends and medially rotates humerus Which of the following muscles is primarily a postural muscle? The SCM continues on to attach to the mastoid bone. Unilaterally- Laterally Flex the head and neck, rotate. (I bought one thing for Dad. The longus colli is a deep cervical flexor acting as an important synergist with the sternocleidomastoid muscle. This cookie is set by GDPR Cookie Consent plugin. antagonist: adductor group, gracilis, synergist: gluteus medius, gluteus minimus, gluteus maximus New York. In the Middle Ages, when the Catholic Church was all-powerful, a(n) Action: Rotates scapula so that its inferior angle moves laterally and upward; important in horizontal movements of arm (pushing and . 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. On either side, the SCM diagonally divides the neck musculature into anterior (front) and posterior (back) triangles. Muscles that work like this are called antagonistic pairs. Antagonist: infraspinatus It was concluded that acute muscle pain is unable to maintain longerlasting resting muscle hyperactivity. It also acts as an accessory muscle of inspiration. The Sternocleidomastoid is an anterior muscle of the neck. Unilaterally: Rotation of head to the opposite side, lateral flexion of the neck on the same side Click to see the original works with their full license. (b) The glenohumeral joint allows for movement in which dimensions? [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). "5. Synergist: Trapezius, Action: prime mover of inspiration The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. a) deltoid. The function of this muscle is to rotate the head to the opposite side or obliquely rotate the head. Synergist: sartorious, Action: adducts, flexes and medially rotates thigh (a) Latissimus dorsi (b) Infraspinous (c) Supraspinous (d) Subscapularis. This can cause atrophy (shrinking) in the affected SCM and may cause difficulty in turning the head and bending the neck. This website uses cookies to improve your experience while you navigate through the website. This muscle binds the skull to the sternum and clavicle. Which of the following muscles is not innervated by the median nerve? Synergist: Extensor carpi radialis longus, Action: Extends and adducts wrists The number of these extra clavicular slips may vary and such occurrence may be unilateral or bilateral. The sternocleidomastoid is innervated by the accessory nerve. The antagonist of the splenius capitis muscle is the Sternocleidomastoid. In a back extension these muscles are the agonist. What is the antagonist muscle in elbow flexion? e) latissimus dorsi. This cookie is set by GDPR Cookie Consent plugin. (a) biceps brachii (b) triceps brachii (c) jaw (d) tongue. 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 . Which of the following muscles is responsible for elevating the eyebrows? The manubrium is the uppermost section of the breastbone. F. edifice Scalene Muscle Group Synergist: Sternocleidomastoid, Longus colli and capitis Antagonist: Sartorious Other functions of the SCM include assisting in breathing, maintaining neck posture, and helping the temporomandibular joint (TMJ) function. 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 sternocleidomastoid muscles help to flex the neck. Muscle agonists. The cookie is used to store the user consent for the cookies in the category "Analytics". The scalenes are synergist muscles, or helper, muscles to the sternocleidomastoid. 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. Antagonist: Splenius These cookies do not store any personal information. A. sternocleidomastoid muscles B. scalene muscles C. pectoralis major D. masseter, Which muscle is directly superior to the trapezius? It also acts as an accessory muscle of respiration, along with the scalene muscles of the neck. antagonist: gluteal muscles, adductor muscles, tensor fascia latae, synergist: adductor muscles, gracilis A. Brachialis B. Deltoid C. Triceps Brachii D. Brachioradialis E. Trapezius. Synergist: NA, Action: rotates and adducts scapula Save. Which muscle acts as an agonist with the teres minor during lateral rotation of the shoulder? An impairment or injury to the spinal accessory nerve can cause weakness or paralysis to the SCM. What is the synergist muscle for sternocleidomastoid? Synergist: Quadriceps, Action: Plantar Flexion 1 Definition. Synergist: Gluteus maximus, Action: Extends thigh and flexes knee c) pectoralis major. The sternocleidomastoid muscles (SCM) help with functions such as head rotation, head tilt, pointing the chin toward the breastbone, and more. Which one? C. censure The cookie is used to store the user consent for the cookies in the category "Other. d. Splenius. Rotation of the head to the opposite side or obliquely rotate the head. 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: Antagonist: pectoralis major Antagonist: Digastric The following passage is from a journal kept by Meriwether Lewis and William Clark during their heralded exploration of the American West. Synergist or Antagonist DRAFT. Anatomy of the Human Body. Synergist: Gastrocnemius, Action: Flexes and rotates medially The ACH causes the resting potential to increase above -55mV, thus initiating an action potential which travels along the muscle fiber. [2]. Some studies have indicated a supernumerary cleido-occipital muscle more or less separate from the sterno-cleido-mastoid muscle.