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D gastrocnemius, David N. Shier, Jackie L. Butler, Ricki Lewis, Hole's Essentials of Human Anatomy and Physiology, David Shier, Jackie Butler, John Hole, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis, 3.1 - Definitions (Monitoring, Process Contro, Unit 2 - Cell Structure and Function AP BIO. The type of muscle that can contract with the greatest force is the A. rectus abdominis C. gluteus maximus. - Multipennate muscles do not produce much power because the fibers run in many directions. parallel, List the arrangement of components found in a third-class lever. Which of the following muscles is part of the rotator cuff? C. standing on your tiptoes A nursing infant develops a powerful sucking muscle that adults also use for whistling. A negative/positive Which of the following muscles contracts during forced expiration? Which of the following muscles has superior, middle and inferior sections? Which of the following muscles has two heads? E. fibularis brevis, Which muscle plantar flexes the foot? Over a period of time these micro-contractions lead . What is the antagonist of the Vastus Intermedius (knee extension)? B. soleus D creatine phosphate/creatine, In cell respiration in muscles, the product that is a waste product is: The digastric muscle is involved in Sternocleidomastoid muscle: want to learn more about it? Dimitrios Mytilinaios MD, PhD - biceps brachii at the elbow; third-class lever A sarcolemma E. vastus lateralis, . This is an example of muscles working as. Achudhan Karunaharamoorthy, Arzt C. temporalis B. biceps brachii and supinator. A. difficult urination. B. deep back muscles extend from the vertebrae to the ribs. The antagonist to the sternocleidomastoid is the splenius capitis. B. external abdominal oblique auricular m's 1. the extrinsic auricular muscles, including the anterior, posterior, and superior auricular muscles. D. rhombohedral. Sphincters have a __________ arrangement of fascicles. posterior E. psoas minor. E. coracobrachialis. C. rotate the head toward the right. A. quadriceps femoris C. medial rotation of the arm. B pump more blood to muscles D pectoralis major, The function of the triceps brachii is to joint act as a fulcrum. What is the antagonist of the Scalenes (Neck extension)? E. linea alba. B the parietal lobes of the cerebrum integrate conscious muscle sense Agonists are the prime movers for an action. B. soleus D. sphincter urethrae and sphincter ani muscles. - muscles that oppose or reverse a particular movement. a) frontalis. a) gluteus medius. A. extensor indicis. D cholinesterase to prevent unwanted continous contractions, The sarcoplasmic reticulum of a muscle fiber contains: A. puckers the mouth for kissing. Which of the following groups of muscles does not move the vertebral column? Thanks rx0711. Which of these muscles is located on the ventral (anterior) side of the body? D. Pectoralis minor. B. belly. E. biceps femoris. A. quadriceps femoris B. deep transverse perineum muscle. B tetanus/coordination A. nasalis Each of the following terms is a descriptive term for a muscle's action, except __________. B. rectus femoris D. masseter and medial pterygoid. The term "shin splints" is applied to People with this disorder show difficulties swallowing, extreme immobility of their throat, facial asymmetries and scoliosis. A. represent a combination of first-class and second-class lever systems. D. abducts the arm. When viewed together, this pair forms a diamond or trapezoid shape, hence its name. E. fibularis brevis, Which muscle everts and plantar flexes the foot? D. multifidus D orbicularis oculi- closes eye, Which muscle is NOT paired with its correct function? What is the antagonist of the Teres Minor (Lateral rotation humerus)? Which has an insertion on the mandible? B. accounts for a sprinter's stance. What muscle(s) serves as an antagonist to the biceps? D. suprahyoid Background: Tooth extraction, changing dentition and malocclusion can decrease area of occlusal contact and negatively affect masticatory efficiency. B), The sternocleidomastoid muscles flex the neck and the splenius cervicis muscles extend it. D center lines of a sarcomere, and myosin filaments are attached, During a state of polarization, the sacrolemma has a ______ charge outside and a ______ charge inside. B. childbirth. A quadriceps femoris C. peroneus tertius What is the antagonist of the Peroneus Brevis (eversion)? Which of the following are correctly matched? B. palatopharyngeus C. auricularis E. function and size, The brachioradialis is named for its C. external intercostals. Prime movers and antagonists are often paired up on opposite sides of a joint, with their prime mover/antagonist roles reversing as the movement changes direction. E. type and shape, Which of the following muscles is named for its shape? The splenius captis is located on the lateral side of the C7. A. back muscles are strong to maintain erect posture. What is the antagonist of the External Intercostals (Elevate ribs)? D. extensor digitorum longus 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. A external intercostals and internal intercostals B. sartorius An exception to this generalization is the extensor-flexor musculature of the ______. Which of the following muscles is involved in chewing gum? C. anterior thigh compartment. B semispinalis capitis and sternocleidomastoid Well, 1 has walls of finite height, and well 2 has walls of infinite height. D. decreased support for the pelvic viscera. Which of the rotator cuff muscles is probably damaged? If a man exercises by doing push-ups every day, he would strengthen or enlarge which of the following muscles? D. vastus medialis A. plantaris During the collision with the ground, he comes to rest in a time of 0.010 s. The average force exerted on him by the ground is + 18 000 N, where the upward direction is taken to be the positive direction. The primary function of the deep muscles of the thorax, such as the intercostals, is to promote __________. E. rhomboideus major, Which muscle rotates and protracts the scapula, and elevates the ribs? The abdominal muscle that has its origin at the pubic crest and symphysis pubis is the D. insertion. What is the antagonist of the Upper Portion Trapezius (Elevate scapula)? could be wrong, but im. The major movement produced during quiet breathing is accomplished by the An antagonist for a muscle on the posterior side of the thigh would be found on the: Which statement is NOT true of antagonistic muscles? Match the following description of muscles that move the head and trunk with its appropriate name: Flexes and laterally rotates the head, Match the muscle action involving mastication with its appropriate muscle name: Elevates mandible and moves mandible side to side. The sternocleidomastoid muscle (also known as sternomastoid ) is found in the neck. E. TLR9 is an important receptor expressed in immune system cells including dendritic cells, macrophages, natural killer cells, and other antigen presenting cells. C. inability of a male to have an erection. 2 and 4 a) Depressor anguli oris b) Mentalis c) Depressor labii inferioris d) Platysma e) Masseter. Semispinalis Capitis, etc. B. triceps brachii B. coracobrachialis Match the word to its correct meaning: Deltoid. The deep muscles of the neck, levator scapulae and middle scalene muscle are supplied by which nerve? The muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the __________. Rectus Abdominus, External oblique, Internal oblique What is the antagonist of the Spinalis (Spine extension)? c. It pushes the charge backward. B. orbicular. C. orbicularis oris What is the antagonist of the Serratus Anterior (Protract scapula)? C. interspinales D. deltoid The sternocleidomastoid muscle flexes the neck and helps with movement of the head. . D. adductors. C repolarization creates a reversal of charges A. a dimple in the chin. E. fibularis brevis, . . After administering ketamine/xylazine mixture (50 and 5 mg/kg, respectively) in order to induce surgical anaesthesia, appropriate shaving of the right cervical area was performed. A. tibialis anterior Most of us carry a lot of tension in the upper trapezius and neck muscles. a) Orbicularis oris. C. contributes to laughing and smiling. In the following sentence, strike through each error in capitalization and write the correct form above it. B. temporalis Once identified, the needle is slowly advanced following the posterior border of the sternocleidomastoid . The bulge of the calf is caused by the ___ and___ muscles. D. vastus medialis D the most strenuous muscle contractions, The part of the brain that initiates muscle contraction is the: - the location of the muscle a) sternocleidomastoid b) orbicularis oculi c) trapezius d) platysma, Which of the following muscles are innervated by the trigeminal nerve? Assume that the only force acting on him during the collision is that due to the ground. D. intrinsic muscles. A. A remove excess body heat What is the antagonist of the Corabobrachialis (Adduction)? The number of muscle fibers best determines how powerful a muscle will be, Which of the following joint muscles is correctly matched with its lever type? A rectus abdominus-extends vertebral column What is the relationship between these muscles when bowing your head? a. Digastric b. Mylohyoid c. Omohyoid d. Sternocleidomastoid. A sartorius A simple example of an antagonist is the Queen in Snow White and the Seven Dwarfs, who opposes and wants to destroy Snow White. Laura M. Kok, .Rob G.H.H. B trapezius- raises shoulders Which of the following muscles extends the forearm and has its insertion on the ulna? E. down. C. flexor carpi radialis the muscle elevates and/or adducts a region. B. C. What is the antagonist of the Internal Intercostals (Depress ribs)? What is the antagonist of the Quadratus Lumborum (Lateral trunk flexion)? C. pectoralis minor and pectoralis major. What is the antagonist of the Latissimus Dorsi (Extension of humerus)? A. extend the neck. The press release said that mayor Watkins will be at the ground-breaking ceremony. A. extrinsic muscles. The pelvic diaphragm consists of what two muscles? Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. Rectus Abdominus, external oblique, internal oblique. D. hold the head of the humerus in the glenoid fossa of the scapula. - the locations of the muscle attachments C. orbicularis oculi What is a muscle that provides the major force for producing a specific movement called? B. soleus Muscle antagonists In order to maintain a balance of tension at a joint we also have a muscle or muscles that resist a movement. A. rectus abdominis B. diaphragm. Hold for 30 seconds. coccygeus C. adductor magnus C. Diaphragm. The biceps brachii functions to pull the radius of the lower arm toward the body. D water, During muscle contraction, oxygen is stored in muscles by: lateral e) hyoglossus. The muscle is closely related to certain neurovascular structures that pass through the neck on their way either to the head or to the periphery of the body. D. coracobrachialis An antagonist is usually a character who opposes the protagonist (or main character) of a story, but the antagonist can also be a group of characters, institution, or force against which the protagonist must contend. The __________ nerve innervates all of the extrinsic tongue muscles. E. trapezius, hold the head of the humerus in the glenoid fossa of the scapula, The rotator cuff muscles A. sternocleidomastoid E. piriformis and quadratus femoris. B. diaphragm B extend the leg What is the antagonist of the Flexor Digitorum Longus (Toe 2-5 flexion)? A flex the neck movement of biceps brachii and the brachialis. a) Deltoid b) Pec Major c) Bicep Brachii d) Supraspinatus. In order for both eyes to direct their gaze to the right, which of the following muscles are used? A a sustained contraction The end of the muscle that connects to the sternum is the, When a skeletal muscle contracts to cause a given movement, the more movable end of attachment of the muscle is termed its, When you "pull your tummy in" and compress your abdomen, you use the rectus abdominis, external abdominal oblique, internal abdominal oblique, and transversus abdominis muscles. B) The sternocleidomastoid is the prime mover, and the sple nius cervicis is the synergist. B. psoas major. Which statement is NOT true of organ systems and movement? What is the antagonist of the Pectoralis Major (Flexion of humerus)? D. latissimus dorsi and pectoralis major. A. The trapezius has many attachment points, extending from the skull and vertebral column to the shoulder girdle . (a) splenius capitis (b) semispinalis capitis (c) longissimus capitis (d) both (a) and (b) (e) all of the above. skeletal muscle contracts and pulls on bone. What is the antagonist of the Tensor Fasciae Latae (Abduction of femur)? B tetanus The sternocleidomastoid (SCM) is a muscle of the neck so-named because it originates on the sternum (sterno) and the clavicle (cleido) and inserts on the mastoid process (mastoid) which is an easily located bony prominence behind the ear (The mastoid process also serves as an attachment for the posterior belly of the digastric, splenius capitis, . B. adducts and laterally rotates the arm. C. tibialis anterior B. tibialis anterior anterior, choose all that apply: Synergists help agonists. A. straight. D. deltoid. Tilt your head towards the left. E. multipennate. An antagonist muscle relaxes (or stretches) when the prime mover muscle contracts. D. extensor hallicus longus The sternocleidomastoid muscle extends from the mastoid process of the temporal bone to the sternum and medial clavicle. In order to put on a glove, the fingers are abducted by hand muscles called the 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 clavicle. e) latissimus dorsi. A acetylcholine to be stored when an impulse arrives A. interossei palmaris D. extensor carpi radialis longus. E. teres major. @article{GravenNielsen1997EffectsOE, title={Effects of experimental muscle pain on muscle activity and co-ordination during static and dynamic motor function. What is the antagonist of the Extensor Digitorum (finger extension)? ______ is a stiff neck due to spasmodic contraction of the neck muscles that pull the head toward the affected side. A. up. When both sternocleidomastoid muscles contract, the head is flexed. D positive/negative, The effect of acetylcholine on the sarcolemma is to make it: A. Frontalis B. Lateral rectus C. Sternocleidomastoid D. Masseter E. Hyoglossus. The cervical plexus will have a honeycomb appearance of hypoechoic nodules super-cial to the brachial plexus within the groove between the inter-scalene muscles as shown in Fig. B myoglobin and myosin Infer information from the first sentence, and then choose the word from the Word Bank that best completes the second sentence. Createyouraccount. C teres major I would honestly say that Kenhub cut my study time in half. B. attach the arm to the thorax. Which of the following is found in the posterior group of forearm muscles? 2023 B. crow's feet wrinkles. - Muscles that relax when the prime mover and synergists are contracting D flex the arm, The muscle on the posterior side of the shoulder that raises the shoulder is the: D. tensor fasciae latae Create flashcards for FREE and quiz yourself with an interactive flipper. Fixators hold joints in place, so movement does not occur. Flexor Digitorum Superficialis, Flexor Digitorum Profundus. A. tibialis anterior Match the following muscle action involving facial expression with its appropriate muscle: Sphincter muscle of the eyelids, which permits squinting and blinking. A. pectoralis major Which of the following muscle movements are considered to be antagonistic? What are the muscles in the neck and the chest area? a group of muscles that work together to cause movement. C. most of the muscle mass in the lower back is from the spinalis muscle. B. sartorius E. triceps brachii, Which muscle will elevate the scapula? D glycogen, In muscle contraction, the energy source _____ produces the waste product _____, which is excreted by the kidneys E. vastus intermedius, . D. gluteus maximus. C. B. lower the head. B. longissimus capitis a. C heat B masseter D gluteus medius and adductor group, Which muscle is NOT paired with an antagonist? A) The sternocleidomastoid is the prime mover, and the splenius cervicis is the fixator. C- tibialis anterior- dorsiflexes foot I hope you are all good and healthy!the sternocleidomastoid muscle. Understand the anatomy of the face and neck and learn how many muscles are in and about the face's muscular system. D. longus capitis EXAMPLE:The 3 mooses were startled by the plain roaring overhead. Lateral flexion of the head and cervical spine when acting unilaterally Agonists: Splenius Capitis Antagonists: Splenius Capitis - contralateral side 4. C gluteus maximus C gluteus maximus lateral flexion D. palatoglossus Contracting the trapezius muscle would articular muscle one that has one end attached to the capsule of a joint. C. internal abdominal oblique C. facial expression. B hamstring group D triceps brachii, The muscle around the eye that closes the eye is the: What is the antagonist of the Rectus Femoris (knee extension)? D. extensor hallicus longus This muscle binds the skull to the sternum and clavicle. C. vastus intermedius The main muscle that resists a movement is called the antagonist. C. brachialis Muscles that have their fasciculi arranged like barbs of a feather along a common tendon are called. The two heads join into one muscle belly that goes on to insert on the lateral surface of themastoid process of the temporal bone and the lateral half of thesuperior nuchal line of the occipital bone. D depolarization is stimulated by cholinesterase, In the sliding filament mechanism of muscle contraction, the proteins that inhibit contractions are: Write down equations to describe the alpha decay of the following atoms: The pelvic diaphragm is formed by the C. levator ani and coccygeus muscles. E. The. What back muscle originates on the vertebral spinous processes? Which description of a muscle action is NOT correct? Describe the relationship between bones and skeletal muscles in the production of body movements. Agonists are the prime movers for an action. The zygomaticus major muscle What is the antagonist of the Biceps Brachii (Flexion of forearm)? The major head flexor muscles are the __________. Damage to which of the following muscles would hinder inspiration? All of these muscles working together can create an efficient, consistent stream of air that will help a singer create a strong and beautiful . Provide their functions. Which of the following represents a class I lever system? C. interspinales c. Spinalis. What are synonyms for sternocleidomastoid (muscle)? A latissimus dorsi levator scapulae D. deltoid hope you all enjoy the vid!enjoy the video and reflect on the mod. The largest buttocks muscle is the C sustained muscle contractions a) Temporalis b) Rectus abdominis c) Erector spinae d) Sternocleidomastoid e) Splenius capitis. D. tensor fasciae latae What is the antagonist of the Extensor Hallucis Longus (Toe 1 extension)? Which muscle is known as the "boxer's muscle" for its ability to move the arm horizontally, as in throwing a punch? 75 Free NCLEX Questions - c/o BrilliantNurse., David N. Shier, Jackie L. Butler, Ricki Lewis, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis, Intro to Sociology Final Exam Study Guide. What is the antagonist muscle to the sternocleidomastoid? b) lateral rectus. Go to: Clinical Significance Change in the platysma with age: What is the antagonist of the Vastus Lateralis (knee extension)? The depressor anguli oris muscle The antagonist of the splenius capitis muscle is the Sternocleidomastoid. (b) Ansa cervicalis. The anconeus works with the triceps brachii to A quadriceps femoris Ans ) 1)Sternocleidomastoid - splenius Action : Sternocleidomastoid ; flex and rotate head side to side Splenius : Extension of head 2)Br View the full answer Transcribed image text: Match each muscle on the left with an antagonistic muscle on the right. E. swallowing. D. dorsal interossei. (b) greater for well 2, or C. vastus lateralis. E. raises the eyelid. 2. A. quadriceps femoris D. extensor hallucis longus; flexor hallucis longus Antagonist muscles are muscles that counteract the action of agonist muscles.Some examples of antagonist muscles are:Triceps work . B carbon dioxide is removed rapidly by incerased respiration 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. All of the following muscles are rotators of the arm. D. class IV lever system. What are attachments for these muscles, and their functions? (a) diaphragm (b) external intercostals (c) sternocleidomastoid (d) scalenes (e) abdominal muscles. The radial pulse can be felt just lateral to the tendon of the D. 1 and 4 All rights reserved. Explain the role of both muscles in terms of agonist and antagonist in both of these movements. Which of the following muscles is involved in forced expiration? E. psoas major. The muscle that is. D more permeable to sodium ions, Which statement is NOT true of the electrical events at the sarcolemma? E. supinators. (iii) Is the groundstate energy of the particle C positive/neutral Hence, it was an excellent model for . D. multifidus The sternocleidomastoid is the prime mover and the splenius cervicis is the fixator. C impulses from the brain are needed for voluntary movement Name the following: A contraction in which muscles produce tension but do not shorten. A hemoglobin in blood plasma B sacrospinalis group The sternocleidomastoid travels indirectly across the side of the neck. C. internal abdominal oblique E. creases in the cheeks, Closing or puckering the lips is the action of the _____ muscle. B iliopsoas and quadriceps femoris D trapezius, The muscle on the anterior side of the trunk that flexes and adducts the arm is the: C gluteus medius A twitch/prolonged twitch Of the following muscles of the thigh, which one is on the posterior side? d) buccinator. D. pectoralis major B sarcomere D the frontal lobes of the cerebellum initiate muscle contraction, The direct energy source for muscle contraction is: C. pectoralis minor Register now D. extensor digitorum longus It pulls the charge forward. The. Contraction of the inferior rectus muscle directs the pupil to look What is the relationship between these muscles when bowing your head? a. platysma b. occipitalis c. sternohyoid d. mylohyoid. Which statement is NOT true of muscle sense? D. rotate the head toward the left. A. genioglossus Called also antagonist. Anatomy of the Respiratory System The function of the respiratory system is to obtain oxygen from the atmospheric air Oxygenating all cells of the body Obtains oxygen from atmospheric air, alveoli is where gas exchange occurs Oxygen diffuses from the blood Ventilation:taking oxygen in and exhaling co2 (breathing) inspiration : transport of oxygen through alveoli . Powerful flexor and adductor of hand. D. internal intercostals B. D. the stationary end of the muscle. D trapezius, The muscle on the posterior side of the trunk that extends and adducts the arm is the: When muscles are named for the movement they produce, one can find action words in their name. B sacrospinalis What is the antagonist of the Extensor Digitorum Longus (Toes 2-5 extension)? D. biceps femoris E. rhomboideus major, Which muscle will depress the scapula or elevate the ribs? 5. C toponin and tropomyosin When an intramuscular injection is given in the anterior aspect of the thigh, the injection is in the trapezius, Anatomy and Physiology: The Unity of Form and Function, Andrew Russo, Cinnamon VanPutte, Jennifer Regan, Philip Tate, Rod Seeley, Trent Stephens, Week 1: Psychopathology (History, Classificat, Honors English Final (finished sorry forgot t. Which is a lateral rotator of the arm? E. hyperextend the head. What is the antagonist of the Sartorius (Flexion of femur)? A gaseous mixture with a molar analysis of 20%CO220\ \% \mathrm{CO}_220%CO2, 40%CO40\ \% \mathrm{CO}40%CO, and 40%O240\ \% \mathrm{O}_240%O2 enters a heat exchanger and is heated at constant pressure. We experience muscle knot, spasm, or pain located over the muscle between the neck and the shoulder. levator ani, choose all that apply: E. raises the eyelid. The brachial plexus should lie between these two muscles. C supply carbon dioxide E. palm. Identify the muscle that performs the following function: Paired muscle that extends vertebral column, maintains erect posture, and laterally flexes the vertebral column. The muscles of the anterior group of forearm muscles are primarily Which muscle lies directly posterior to the musculus serratus posterior inferior right and left muscle groups? The cervical plexus will have a honeycomb appearance of hypoechoic nodules superficial to the brachial plexus within the groove between the interscalene muscles as shown in Fig. B quadriceps femoris A. pennate. C. location and size. A sartorius It was described with a frequency of 6.8% from 399 patients with diagnosis of cervical dystonia and usually coexists with torticollis and/or laterocollis, as mixed cervical dystonia patterns. B. serratus anterior B. pectoralis minor B. the end of the muscle where the action occurs. abduction C. medially rotates the arm. Would the muscles that cause flexion of the neck have their origin or insertion on the head? B triceps brachii The trapezius muscle runs from the back and sides of your neck to your shoulder blades. Sternocleidomastoid is the most superficial and largest muscle in the front portion of the neck. Nelissen, in Principles of Gender-Specific Medicine (Third Edition), 2017 37.3.1 Focal Dystonia. D. function and size. What is the antagonist of the Adductor Magnus (adduction of femur)? Muscles that work like this are called antagonistic pairs. D. The sternocleidomastoid is the fixator and the splenius cervicis is the prime mover. A. pectineus Most flexor muscles are located on the ___ aspect of the body, most extensions are located ___. C myoglobin in blood plasma a. Antagonist b. Fixator c. Prime mover (agonist) d. Synergist. A the cerebellum promotes coordination C. Diaphragm. Choose the letter that best answers the question or completes the statement. What thoracic muscles are involved in expiration? D. tensor fasciae latae Match the muscle with its correct origin and insertion: Temporalis, Origin: temporal fossa pennate arrangement of fascicles; spindle-shaped muscle What is the function of Sternocleidomastoid? Which of the following muscle is found in the head? A. palmaris longus Copyright What are the magnitude, sign, and xxx-coordinate of the third charge? (a) greater for well 1, The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. Both wells contain identical quantum particles, one in each well. D. extensor digitorum longus Aim of this study was to evaluate difference in masticatory efficiency in association with previously named factors. C. extensor digitorum longus C acetylcholine to transmit the impulse to the muscle fiber E. brachioradialis. Which of the following muscles is named for its location? B. supraspinatus and latissimus dorsi. Synonyms for sternocleidomastoid (muscle) in Free Thesaurus. E. calcaneal; peroneal, Which of the following muscles is used when walking on your tiptoes? C. occipitofrontalis B. gastrocnemius C. extensor digitorum longus D sarcolemma, At the neuromuscular junction, the sacrolemma contains: Antagonists: Longissimus Capitis Spinalis Capitis Splenius Capitis Semispinalis Capitis Sternocleidomastoid (posterior fibers) 3. Tuck your chin in and downwards. Getting their priceless heirlooms back was not enough for the many victims of the thief; they wanted the thief to serve time in prison. Rectus Abdominus, external oblique, internal oblique scalene muscles . B. subscapularis The sternocleidomastoid and trapezius muscles are located within the investing fascia of the neck (Figure 25-2A).. - trapezius action on the atlanto-occipital joint; second-class lever . internal intercostals D. back muscles are not very strong.