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? Synergist: deltoid, Action: lateral rotation of humerus The supraspinatus and infraspinatus muscles have the main part of their body attached to which of the following bone? Which of the following groups of muscles does not move the vertebral column? A few fibers of the SCM insert at the bottom of the. Torticollis gives the appearance of a tilted head on the side involved. [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 . antagonist: adductor group, gracilis, synergist: gluteus medius, gluteus minimus, gluteus maximus Antagonist: Flexor carpi ulnaris a. Pectoralis minor b. Subscapularis c. Rhomboid d. Trapezius, Which of the following muscles has two heads? The mutual links between muscle pain and resting electromyographic (EMG) activity are still controversial. Working with a physical therapist can be a useful modality to strengthen the SCM if it has been injured or weakened. For intermediary anatomy students learning skeletal and muscle structure. Interrelationship of the Spine, Rib Cage, and Shoulder", "28. a. Anterior deltoid b. By Anne Asher, CPT One way to remember which muscle is the agonist - it's the one that's. (I bought one thing for Dad. [4], They arise from the anterolateral surface of the manubrium sterni and the medial third of the superior surface of the clavicle, respectively. Insertion: Attaches to the mastoid process and the lateral half of the superior nuchal line of the occipital bone. Antagonist: sartorious Get access to this video and our entire Q&A library. But opting out of some of these cookies may affect your browsing experience. Which muscle acts as an antagonist to trapezius? Correct answer-short muscles: upper traps, sternocleidomastoid, lattismus dorsi, teres major, pec major/minor long muscles: rhomboids, mid traps, lower traps, . [medical citation needed]. The absence of SCM cover may lead to complicated congenital neck hernias in children, in addition to functional limitations. Antagonist: Temporalis a) pronator teres b) extensor carpi radialis longus c) Biceps brachii d) Triceps brachii, Which of the following muscles helps to open the mouth (depress the mandible)? 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. Which of the following muscles is responsible for elevating the eyebrows? E. The sternocleidomastoid is the synergist and the splenius cervicis is the fixator. 83% average accuracy. 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. Definition The gluteus medius is one of four superficial gluteal muscles that allow a broad range of movement in the hip joint. D. The sternocleidomastoid is the fixator and the splenius cervicis is the prime mover. These cookies track visitors across websites and collect information to provide customized ads. Innervation is when an organ or body part is supplied with nerves. In the Middle Ages, when the Catholic Church was all-powerful, a(n) When refering to evidence in academic writing, you should always try to reference the primary (original) source. Which of the following muscles is not innervated by the median nerve? Which of the following muscles flexes the neck? Available from: T Hasan. A. rectus abdominis B. transversus abdominis C. erector spinae D. latissimus dorsi. Antagonist: external intercostals Kendall, Florence Peterson, McCreary, Elizabeth Kendall, and Provance, Patricia Geise. 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) (a) Brachialis (b) Subscapularis (c) Teres minor (d) Supraspinous. Lippincott, Williams and Wilkins. 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: trapezius, Action: extends or hyperextends head [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. Use each word once. skeletal muscle is attached to bone at origin and insertion. Synergist: Extensor digitorium, Action: Powerful arm extensor Synergist: rectus femoris, Action: Extends knee and stabilizes it. Six heads of origin of sternocleidomastoid muscle: a rare case. Synergist: pectineus, Action: Hip flexor For example, the scalenes are synergist muscles to the sternocleidomastoids (SCM), because they help with turning and tilting the head and neck. 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? b) gastrocnemius. Sternocleidomastoid Synergists Scalenes, opposite side of splenius capitis Sternocleidomastoid Antagonists Upper Traps, opposite side of the SCM Scalenes Origin Anterior,Medial, and Posterior Transverse Processes of the Cervical Vertabrae Scalenes Insertion Anterior Insertion- First Rib Medial Insertion- First Rib Posterior Insertion- Second Rib Antagonist: Scalenes Rotation, retraction, elevation, and depression of scapula, serratus anterior muscle, Latissimus dorsi, Pectoralis Major. Which of the following muscles is completely superficial? Synergist: Tensor fascia latae, Action: Extends thigh Antagonist: Biceps femoris Meanwhile, a muscle with the opposite action of the prime mover is called an antagonist. Synergist: Platysma, Action: Flexes neck forward when together When Marta and her family taked(1)\overset{\text{(1)}}{{\underline{\text{taked}}}}taked(1) a vacation in Australia, they are(2)\overset{\text{(2)}}{{\underline{\text{are}}}}are(2) surprised at how the time changed during their airline flights across the Pacific Ocean. Which of these muscles is not the muscle of inspiration? When both SCM muscles contract, the movements can include: Simultaneous bilateral SCM muscle contraction also plays a role in the breathing process. When the clavicular origin is broad, it is occasionally subdivided into several slips, separated by narrow intervals. (b) The glenohumeral joint allows for movement in which dimensions? In most cases Physiopedia articles are a secondary source and so should not be used as references. Nerve Supply: Cervical nerve 7. When acting alone it rotates to the opposite side (contralaterally) and slightly (laterally) flexes to the same side. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. Antagonist: Splenius Each sentence contains a compound on 2022-08-08. They derive embryonically from the first and second pharyngeal arches. The occurrence of such a variation can be explained by fusion failure or abnormal mesodermal splitting during development. In the case of the sternocleidomastoid muscle, it is innervated by the accessory nerve (cranial nerve XI). A neck extension movement that takes place at your first. 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. Antagonist: extensor carpi ulnaris We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Synergist: supraspinatus, Action: Pulls shoulders medially load is the weight of the object. "5. Synergist: adductor longus, Action: adducts, flexes and medially rotates thigh In this case, it lifts up the breastbone and the area of the collarbones that are nearest to the midline of the body. The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles. a) Clavicle b) Cervical vertebrae c) Scapula d) Sacrum. 2 What muscle is behind the sternocleidomastoid? The positive effects of physical activity and exercise on almost all functions of the human body are widely acknowledged. Synergist: Pronator teres, Action: Extends and abducts wrist Recognizing Compound Indirect Objects. A synergist that makes the insertion site more stable is called a fixator. Treatment of a shortened SCN involves gentle stretching of a tight SCM muscle to lengthen it to a normal shape. KenHub. Other functions of the SCM include assisting in breathing, maintaining neck posture, and helping the temporomandibular joint (TMJ) function. One side can contract, or both sides can contract. The sternal head is a round fasciculus, tendinous in front, fleshy behind, arising from the upper part of the front of the manubrium sterni. 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? 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: They cause formation of supernumerary lesser supraclavicular fosse. 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. Antagonist: Sartorious Synergist: Splenius, Action: adducts and medially rotates arm B), Which large muscle has an attachment on the external occipital protuberance and extends the neck? 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. Which muscle acts as a synergist with pectorals minor during abduction of the scapula? 1 Definition. Torticollis. They may not cause any functional advantage or disadvantage in neck movement but might be physically interfering during invasive procedures. F. edifice Vascular supply: Muscular branches of the ascending Cervical artery. A. biceps brachii B. brachialis C. brachioradialis D. triceps brachii, Which of the following muscles is a developmentally dorsal muscle of the upper limb? English Edition. All rights reserved. They assist the SCM in turning and tilting both the head and neck. 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. A. Brachialis B. Deltoid C. Triceps Brachii D. Brachioradialis E. Trapezius. You also have the option to opt-out of these cookies. You also have the option to opt-out of these cookies. [5][6] It supplies only motor fibres. Cook, were still viewed by us with as much pleasure as those deservedly famed adventurers ever ( 2 ) beheld theirs; and I dare say with quite as much anxiety for their safety and preservation. a. coracobrachialis b. latissimus dorsi c. levator scapulae d. pectoralis minor, Which of the following muscles is responsible for scapular elevation, retraction, and downward rotation? Contraction of the muscle gives rise to a condition called torticollis or wry neck, and this can have a number of causes. This cookie is set by GDPR Cookie Consent plugin. (a) Biceps brachii (b) Latissimus dorsi (c) Pectoralis major (d) Subscapularis. L. languish Synergist: teres minor, Action: Lifts ribs However, you may visit "Cookie Settings" to provide a controlled consent. 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.