Sternocleidomastoid --- Splenius Capitis. These muscles run up, along the spine, from the base to the skull. 3. (a) sternocleidomastoid (b) splenius capitis (c) semispinalis cervicis (d) scalenus anterior. Edit. "offense, offence". Anne Asher, ACE-certified personal trainer, health coach, and orthopedic exercise specialist, is a back and neck pain expert. The supraclavicularis muscle arises from the manubrium behind the sternocleidomastoid and passes behind the sternocleidomastoid to the upper surface of the clavicle. The cookie is used to store the user consent for the cookies in the category "Performance". Synergist: Splenius, Action: adducts and medially rotates arm A. abductor pollicis brevis B. flexor pollicis longus C. medial heads of flexor digitorum profundus D. superficial head of flexor pollicis brevis E. pronator quadratus, Which of the following muscles are innervated by the trigeminal nerve? Other functions of the SCM include assisting in breathing, maintaining neck posture, and helping the temporomandibular joint (TMJ) function. Anne Asher, ACE-certified personal trainer, health coach, and orthopedic exercise specialist, is a back and neck pain expert. Download page 151-200 on PubHTML5. sternocleidomastoid synergist and antagonist The splenius captis is located on the lateral side of the C7. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Which muscle pulls the skin of the chin upward? (adsbygoogle = window.adsbygoogle || []).push({}); For Pain and Symptom Information See: Sternocleidomastoid Muscles: Head, Eyes, Sinus, Ears, Throat Pain. Synergist: Extensor digitorium, Action: Powerful arm extensor 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? The passage is written by Lewis and dated April 7, 1805. a. Anterior deltoid b. Antagonist: Extensor digitorium longus In many animals, the cleidomastoid belly is distinctly separate from the sternomastoid belly. 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. The infrahyoid muscles are also part of a . The sternocleidomastoid is innervated by the accessory nerve. The cookie is used to store the user consent for the cookies in the category "Analytics". About a dozen cases have reported complete unilateral absence of the muscle. J. heretic Scalene Muscle Group Synergist: Sternocleidomastoid, Longus colli and capitis It covers the anterior surface of the neck superficially. The muscle allows the head and vertebrae to extend. What is the antagonist muscle in elbow flexion? a. Levator scapulae b. Pectoralis minor c. Rhomboid d. Serratus anterior e. Trapezius. Variations Of The Sternocleidomastoid Muscle: A Literature Review. Together, they function in swallowing, chewing, and speech, serve as important surgical landmarks in neck dissections and are used routinely for reconstruction. What is the relationship between these muscles when bowing your head? ). Antagonist: Gracilis Synergist: Action: internal expiration by compressing ribs toward each other The sternocleidomastoid is the prime mover and the splenius cervicis is the synergist. 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 muscles make up the common flexor tendon of the medial epicondyle? 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? Antagonist: Gastrocnemius roberta snider hartville ohio obituary la dissolution est une transformation chimique ou physique i would appreciate any feedback you can provide carbon nation tribe . Synergist: Tibialis posterior, Action: Keeps foot flat on ground b) masseter. A few fibers of the SCM insert at the bottom of the. Antagonist: Digastric Interrelationship of the Spine, Rib Cage, and Shoulder", "28. Synergist: gluteus maximus, Action: extends knee and stabilizes it https://www.kenhub.com/en/library/anatomy/sternocleidomastoid-muscle, https://www.youtube.com/watch?v=eD3Ds3GIt9M, https://www.physio-pedia.com/index.php?title=Sternocleidomastoid&oldid=299309, a medial rounded and tendinous sternal head (SH). (a) biceps brachii (b) triceps brachii (c) jaw (d) tongue. Vascular supply: Muscular branches of the ascending Cervical artery.
Learn the definition of an antagonist muscle and understand how it differs from an agonist muscle. KenHub. are found Synergists prevent movement ot the inter-in the large trunk and thigh muscles, . Synergist: Trapezius, Action: prime mover of inspiration 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 d) occipitalis. Analytical cookies are used to understand how visitors interact with the website. Synergist: Temporalis, Action: Closes jaw One originates from the collarbone/clavicle and the other from the breastbone/manubrium. Synergist: psoas, Action: adducts thigh 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. We also use third-party cookies that help us analyze and understand how you use this website. Save. Explore antagonistic muscles. Lippincott, Williams and Wilkins. When acting together it flexes the neck and extends the head. They assist the SCM in turning and tilting both the head and neck. Antagonist: Tibialis Anterior Which of the following muscles is most active during medial rotation of the arm? 0. Which of the following muscles is responsible for elevating the eyebrows? We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. K. irascible 2023 Dotdash Media, Inc. All rights reserved. The superficial layer includes sternohyoid and omohyoid, while the deep layer is made up of sternothyroid and thyrohyoid. Accessory muscles of inhalation include? 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. a) trapezius b) levator scapula c) serratus anterior d) latissimus dorsi. The cookies is used to store the user consent for the cookies in the category "Necessary". 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. Then slowly reread the passage, writing your own definition for each italicized word. What muscle(s) serves as an antagonist to the biceps? Muscles Testing and Function with Posture and Pain. last ten years, I could but esteem this moment of my departure as among the most happy of my life. The antagonist of the splenius capitis muscle is the Sternocleidomastoid. The sternocleidomastoid muscles help to flex the neck. 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. 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. 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? (a) What muscles make up the rotator cuff? 1 What is the synergist muscle for sternocleidomastoid? Torticollis is a movement disorder in which the head is persistently turned to one side. 3 months ago. Bilaterally: Extend head and neck
Moore, Keith, L., Dalley, Arthur, F. Clinically Oriented Anatomy. Antagonist: pectoralis major Extension of the head and cervical spine when posterior fibers act bilaterally, 2. Middle: Pectoralis minor, serratus anterior
Muscle overlays on the human body. Synergist: gluteus maximus, Action: adducts and medially rotates arm Synergist: Gluteus maximus, Action: Extends thigh and flexes knee Synergist: transverse abdominis, Action: compresses abdominal contents Along the muscle fibers are t-tubule openings which facilitate the spread of the action potential into the muscle fibers. process of using agonist and synergist to dynamically move the joint into range of motion. It also acts as an accessory muscle of inspiration. Synergist: pectineus, Action: extends knee Which one? (a) latissimus dorsi (b) pectoralis major (c) rhomboid (d) subclavius (e) trapezius. antagonist: trapezius, latissimus dorsi, rhomboids, pectoralis major, antagonist: biceps brachii and brachialis, synergist: brachialis The signaling process to contract or relax the sternocleidomastoid begins in Cranial Nerve XI, the accessory nerve. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. Strap-like; e.g., sternocleidomastoid Or: Flexion of the head and cervical spine when anterior fibers act bilaterally, 3. It was concluded that acute muscle pain is unable to maintain longerlasting resting muscle hyperactivity. copyright 2003-2023 Homework.Study.com. Sternocleidomastoid Function with and without the Longus Colli. More rarely, the adjoining margins of the sternocleidomastoid and trapezius are in contact. antagonist: adductor group, gracilis, synergist: gluteus medius, gluteus minimus, gluteus maximus The Wellness Digest's content is for informational purposes only. A. Pronator teres B. Flexor carpi radialis C. Brachioradialis D. Flexor carpi ulnaris E. Biceps brachii. 1173185, T Hasan. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. Antagonist: Tensor fascia latae Is this considered flexion or extension? Antagonist: extensor carpi radialis longus A neck extension movement that takes place at your first. Read the entire passage once to get a general idea of what it is about. Synergist: Tensor fascia latae, Action: Extends thigh For intermediary anatomy students learning skeletal and muscle structure. Antagonist: Latissimus dorsi Muscles. This tent is in the Indian stile formed of a number of (8) dressed Buffaloe skins sewed together with sinues. When you take a deep bow, which of the following muscles do you use? For example, the agonist, or prime mover, for hip flexion would be the iliopsoas. Which of these muscles is the prime mover of elbow extension? The ACH causes the resting potential to increase above -55mV, thus initiating an action potential which travels along the muscle fiber. a. Longissimus. During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist. When refering to evidence in academic writing, you should always try to reference the primary (original) source. Edit. (a) Biceps brachii (b) Latissimus dorsi (c) Pectoralis major (d) Subscapularis. b) triceps brachii. Study with Quizlet and memorize flashcards containing terms like Buccinator Synergist, Buccinator Antagonist, Frontalis Antagonist and more. Synergist: Extensor carpi radialis longus, Action: Extends and adducts wrists C. The sternocleidomastoid is the prime mover and the splenius cervicis is the antagonist. 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? However, you may visit "Cookie Settings" to provide a controlled consent. This cookie is set by GDPR Cookie Consent plugin. antagonist: latissimus dorsi, pectoralis major (for adduction), synergist: teres major, pectoralis major, latissimus dorsi The SCM becomes chronically shortened in cases of torticollis. c. Spinalis. The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. Each sentence contains a compound 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. Many actions in the body do have one muscle that is responsible for more of the work in that action than any other muscle. Antagonist: diaphram It does not store any personal data. Kapandji, I.A., "The Physiology of the Joints". Synergist: Gastrocnemius, Action: Flexes and rotates medially English Edition. This category only includes cookies that ensures basic functionalities and security features of the website. E. The. Cervical isometrics in various directions including flexion, side bending, and rotation. Antagonist: external intercostals Which of the following muscles is (only) responsible for scapular protraction and upward rotation? 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. 5- 10 reps/ 1-2 seconds Dynamic Stretching . Antagonist: Palmaris longus Antagonist: Splenius [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 . What is the function of the sternocleidomastoid muscles? What muscle attaches at the anterior superior iliac spine, and crosses both the hip and knee joints? 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. The cookie is used to store the user consent for the cookies in the category "Other. 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. H. erroneous b. Quadratus lumborum. MedlinePlus, U.S. National Library of Medicine. 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. We also use third-party cookies that help us analyze and understand how you use this website. Which of the following is the term that describes the relation of brachioradialis to biceps brachii during forearm flexion? Antagonist: Psoas Which of these muscles is located on the ventral (anterior) side of the body? d) biceps brachii. (I bought one thing for Dad. A. Gives you the force to push the ball. Synergist: teres major, Action: Lateral rotation of humerus Antagonist: Gluteus maximus Click to see the original works with their full license. This would leave no posterior triangle. a) frontalis. 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: Thank you, {{form.email}}, for signing up. An aponeurosis is a broad flat expanse of tendon. (Select all that apply.) Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. 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. Antagonist: Brachioradialis antagonist: quadriceps femoris muscles, synergist: soleus kleine weie friedenstaube text und noten. Synergist or Antagonist DRAFT. Createyouraccount. The splenius captis is located on the lateral side of the C7. The sternocleidomastoid is the prime mover and the splenius cervicis is the antagonist. Action: Rotates scapula so that its inferior angle moves laterally and upward; important in horizontal movements of arm (pushing and . Which of the following muscles acts to protract the mandible? (a) the erector spinae (b) the rhomboid group (c) the splenius group (d) the scalenes (e) the transversospinalis. Antagonist: gastrocnemius An excellent book for those beginning the study of anatomy. 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. Middle Fibers: elevation, upward rotation and adduction of the scapula. a) Sternocleidomastoid b) Gastrocnemius c) Gluteus maximus d) Flexor carpi radialis e) None of the above; 1. Which of the following muscle is most active during the abductive of the arm?
Muscles have a point of origin and a point of insertion origin - (head) - normally is more stationary than insertion insertion - undergoes more movement. 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. Antagonist: gluteus maximus Synergist: NA, Action: Pronates forearm Sternocleidomastoid (Action, Synergist, Antagonist, BodyBuilder (Y/N)) Action: Flexes or Rotates the Head Synergist: N/A Antagonist: N/A BodyBuilder: Yes . The SCN can produce several different neck movements. Which of the following muscles is primarily a postural muscle? This website uses cookies to improve your experience while you navigate through the website. a) deltoid. Antagonist: Triceps Antagonist: Biceps brachii (a) Auricular. The supraspinatus and infraspinatus muscles have the main part of their body attached to which of the following bone? a) sternocleidomastoid b) orbicularis oculi c) trapezius d) platysma, Which muscle acts to anchor the scapula? Antagonist: rhomboids b) gastrocnemius. Kendall, Florence Peterson, McCreary, Elizabeth Kendall, and Provance, Patricia Geise. chest press -> rotator cuff Antagonist . When it contracts, it produces a slight wrinkling of the neck, and a "bowstring" effect on either side of the neck. Synergist: Gracilis, Action: Prime mover of foot inversion Which of the following muscles is most active during lateral rotation of the arm? [3] When both sides of the muscle act together, it flexes the neck and extends the head. D. Pectoralis minor. antagonist: adductor group, rectus femoris, synergist: gluteal minimus and tensor fasciae latae Middle: Adduct the scapula, stabilize the scapula
antagonist: tensor fasciae latae and gluteal muscles, synergist: hamstring muscles, gracilis, gastrocnemius, and sartorius Drug combinations may exhibit synergistic or antagonistic effects. Muscle agonists. Antagonist: Scalenes These cookies do not store any personal information. Which of the following muscles flexes the neck? 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. Lower: Depress the scapula, upwardly rotate the scapula, Upper: Levator scapula, serratus anterior, SCM,
indirect object. 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. Upload your PDF on PubHTML5 and create a flip PDF like Seeleys essentials of anatomy physiology ( etc. B. Abdominal. e) platysma. ibed_guidance published Seeleys essentials of anatomy physiology ( etc.) A. Sternocleidomastoid. a) orbicularis oris b) platysma c) orbicularis oculi d) sternocleidomastoid, What muscle is directly lateral to the sternohyoid? [3] It also flexes the neck. Anatomical Attachments: Origin: The Sternal head attaches to the manubrium of the sternum; the Clavicular head attaches to the medial third of the clavicle. The supraclavicularis muscle arises from the manubrium behind the sternocleidomastoid and passes behind the sternocleidomastoid to the upper surface of the clavicle. I bought Dad^a screwdriver set for Christmas. Underline nouns or pronouns that make up each one. Synergist: Gastrocnemius, Action: Flexes toes The accessory nerve nucleus is in the anterior horn of the spinal cord around C1-C3, where lower motor neuron fibers mark its origin. Some authors regard such fusions to be a normal developmental feature , due to their common derivation from the post- sixth branchial arch. Insert a caret (^) to show where the word only should be placed to match the meaning in parentheses. The thickness of the CH is variable. Churchill Livingstone. They derive embryonically from the first and second pharyngeal arches. 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. Occasionally, the SCM fuses with the trapezius, leaving no posterior triangle. For beginning and intermediary anatomy .
Muscles that work like this are called antagonistic pairs. One SCM can also turn, or rotate, your head to the opposite side. Synergist: external intercostals. [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). The sternocleidomastoid is the prime mover and the splenius cervicis is the fixator. That is usually the journal article where the information was first stated. The deep muscles of the neck, levator scapulae and middle scalene muscle are supplied by which nerve? . c) brachialis. Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. B. Antagonist: Sartorious 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. Antagonist: Supinator Which of these muscles is not the muscle of inspiration? Synergist or Antagonist DRAFT. It also acts as an accessory muscle of respiration, along with the scalene muscles of the neck. The antagonist of the splenius capitis muscle is the Sternocleidomastoid. 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? G. enmity Describe the relationship between bones and skeletal muscles in the production of body movements. The occurrence of such a variation can be explained by fusion failure or abnormal mesodermal splitting during development. Antagonist: tensor fascia latae Antagonist: Biceps femoris The other muscles in the anterolateral neck flexor group are the scalenes, which are located more deeply in the neck than the SCM. Six heads of origin of sternocleidomastoid muscle: a rare case. Treatment involves physiotherapy exercises to stretch the involved muscle and strengthen the muscle on the opposite side of the neck. antagonist: quadriceps femoris muscles, synergist: adductor muscles Would you show Carl and him the photograph? Which of the following muscles produces the main flexion of the elbow? However, they can be effectively utilized for muscle flap harvests. 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. Antagonist: Gluteus maximus We were now about to penetrate a country at least two thousand miles in width, on which the foot of civilized man had never (3) trodden; the good or evil it had in store for us was for experiment yet to determine, and these little vessells contained every article by which we were to expect to (4) subsist or defend ourselves. 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? Antagonist: Digastric Get access to this video and our entire Q&A library. Which of the following muscles does not attach to the humerus? A. sternocleidomastoid muscles B. scalene muscles C. pectoralis major D. masseter, Which muscle is directly superior to the trapezius? How did the United States respond to Jewish refugees after Kristallnacht? Antagonist: deltoid If there were(10)\overset{\text{(10)}}{{\underline{\text{were}}}}were(10) no date line, he or she would arrive home with a watch whose date is a day off from everyone else's. This cookie is set by GDPR Cookie Consent plugin. c) medial pterygoid. 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 _____. e) buccinator. Insertion: Attaches to the mastoid process and the lateral half of the superior nuchal line of the occipital bone. 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. They act to extend the spine, bending it backwards. Antagonist: Digastric In this case, it lifts up the breastbone and the area of the collarbones that are nearest to the midline of the body. a) biceps femoris b) brachioradialis c) triceps brachii d) pectoralis major e) deltoid. Recognizing Compound Indirect Objects. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. [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. 5th Edition. The mutual links between muscle pain and resting electromyographic (EMG) activity are still controversial. Which of the following muscles is used in breathing? The sternocleidomastoid muscle (SCM) is an important landmark in the neck which divides it into an anterior and a posterior triangle. 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. Synergist: supraspinatus, Action: Pulls shoulders medially What is the antagonist muscle in elbow flexion? Acetylcholine (ACH) is released from vesicles and is sent over the synaptic cleft to receptors on the postsynaptic bulb. Antagonist: deltoid Which of the following groups of muscles does not move the vertebral column? Which of the following muscles is not innervated by the median nerve? A. Frontalis B. Lateral rectus C. Sternocleidomastoid D. Masseter E. Hyoglossus, Which of the muscles listed below initiates movement at the talocrural (ankle) joint? Synergist: Pronator teres, Action: Extends and abducts wrist Lateral surface of the mastoid process through a strong tendon, and to the lateral half of superior nucheal line through an aponeurosis. 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? (a) Teres major (b) Supraspinatus (c) Biceps brachii (d) Brachialis (e) Pectoralis major. The function of this muscle is to rotate the head to the opposite side or obliquely rotate the head. Antagonist: Pronator teres 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)? A) The sternocleidomastoid is the prime mover, and the splenius cervicis is the fixator. Antagonist: Masseter Synergist: Psoas, Action: stabilizes pelvis 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. 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. Synergist: sartorious, Action: adducts, flexes and medially rotates thigh 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. Action: draws eyebrows together and inferiorly; wrinkles forehead vertically (frowning) Action: bilaterally- flexes & rotates lumbar region; compresses abdomen; unilaterally- trunk rotation and lateral flexion. What is the synergist muscle for sternocleidomastoid? Middle deltoid c. Posterior deltoid d. Superior deltoid. S, sternocleidomastoid: 7", trapezius; D, deltoid; . antagonist: tibialis anterior, synergist: hamstring muscles, gracilis, gastrocnemius, sartorius