muscle mnemonics origin, insertion action

Registered Nurse, Free Care Plans, Free NCLEX Review, Nurse Salary, and much more. It allows for powerful elbow extension (such as doing a pushup). You can feel the temporalis move by putting your fingers to your temple as you chew. Serratus anterior muscle:This muscle is so named due to its anterior digitations that have a serrated or finger-like appearance. It inserts on the distal phalangesof the 2nd to 5th digits and acts to flex the distal IP joints of the fingers. Supraspinatus muscle: This rotator cuff muscle is deep and originates from the supraspinous fossa which is located on the posterior superior portion of the scapula. Some of the axial muscles may seem to blur the boundaries because they cross over to the appendicular skeleton. Its supinating effect are maximal when the elbow is flexed. All Rights Reserved. It is innervated by the radial nerve, a portion of the posterior branch of the brachial plexus. The tendon of the muscle passes in its own tunnel to enter the palm and it inserts onto the base of the 1st distal phalanx. Get instant access to this gallery, plus: Introduction to the musculoskeletal system, Nerves, vessels and lymphatics of the abdomen, Nerves, vessels and lymphatics of the pelvis, Infratemporal region and pterygopalatine fossa, Meninges, ventricular system and subarachnoid space, Extensor carpi radialis longus and brevis, Pectoralis major, Pectoralis minor, Deltoid, Latissimus dorsi, Supinator, Extensor digitorum, Extensor carpi ulnaris, Extensor carpi radialis longus and brevis, Extensor indicis proprius, Extensor digiti minimi, Brachioradialis, Thenar eminence, Hypothenar eminence, Interossei, Lumbricals, Inferior angle and lower part of the lateral border of the scapula, Intertubercular sulcus (medial lip) of the humerus, Adduction and medial rotation of the humerus (arm), Lateral border of the scapula (middle part), Greater tubercle of the humerus (inferior facet), Lateral rotation of the arm, stabilization of the humerus as part of the rotator cuff muscles, Greater tubercle of the humerus (middle facet), Greater tubercle of the humerus (superior facet), Assistance in arm abduction,stabilization of the humerus as part of the rotator cuff muscles, Medial rotation of the arm,stabilization of the humerus as part of the rotator cuff muscles, Transverse process of the atlas and axis, posterior tubercles C3 and C4, Posterior surface of the medial scapular border (from the superior angle to the root of the spine of the scapula), Anterior rami of the nerves C3 and C4, dorsal scapular nerve (branch of the C5), Superior nuchal line, external occipital protruberance, nuchal ligament, spinous processes of C7 to T12 vertebrae, Lateral third of the clavicle, acromion and spine of the scapula, Spinal accessory nerve; C3 and C4 spinal nerves, Elevation, depression, and retraction of the scapula, Medial half of the clavicle (clavicular head); anterior surface of the sternum, 1st to 6th costal cartilages, aponeurosis of, Adduction and medial rotation of the humerus, Anterior surface of the 3rd, 4th, and 5th ribs and the fascia overlying the intercostal spaces, Medial border and superior surface of the coracoid process of the scapula, Protraction of the scapula, pulls the coracoid process anteriorly and inferiorly, accessory muscle in respiratory, Lateral third of the clavicle, acromion, and spine of scapula, Abduction and stabilization of the shoulder joint, Spinous processes of T7-L5 and sacrum, iliac crest, X-XII ribs, Distal half of the anterior side of the humerus and intermuscular septa, Flexion of the forearm at the elbow joint, Flexion of the forearm at the elbow joint, supinator of the forearm, accessory flexor of the arm at the glenohumeral joint, Anterior surface of the ulna (distal quarter), Anterior surface of the radius (distal quarter), Forearm pronationand binding of the radius and ulna, Anterior surface of the radius and interosseous membrane, Proximal parts of the anterior and lateral surfaces of the ulna and interosseous membrane, Bases of the phalanges of the 4th and 5th digits (medial part), bases of the phalanges of the 2nd and 3rd digits (lateral part), Ulnar nerve (medial part), anterior interosseous nerve (lateral part), Flexion of the distal phalanges at the interphalangeal joints of the 4th and 5th digits (medial part) and of the 2nd and 3rd digits (lateral part), Medial epicondyle of the humerus and coronoid process of the ulna (humero-ulnar head) and superior half of anterior border (ulnar head), Shafts of middle phalanges of medial four digits, Flexion of middle phalanges at proximal interphalangeal joints and flexion of the proximal phalanges at the metacarpophalangeal joints of the middle four digits, Medial epicondyle of the humerus (common flexor tendon), Flexor retinaculum and palmar aponeurosis, Medial epicondyle of the humerus (humeral head), coronoid process of the ulna (ulnar head), Lateral epicondyle of the humerus, crest of the ulna, supinator fossa, radial collateral and anular ligaments, Surface of the proximal third of the radial shaft, Posterior surfaces of the middle and distal phalanges (2nd-5th), Posterior interosseus nerve (branch of the radial nerve), Extension of the index, middle, ring and little fingers, Lateral epicondyle of the humerus, posterior border of the ulna, Medial side of the base of the metacarpal V, Posterior side of the distal third of the ulnar shaft; interosseous membrane, Proximal two-thirds of the supra-epicondylar ridge of the humerus, Lateral surface of the distal end of the radius, Forearm flexion, especially during mid-pronation, Flexor retinaculum and tubercle of trapezium and scaphoid bones, Thumb flexion, abduction, and medial rotation resulting in a combined movement called opposition, Abduction of the 5th digit and flexion assistance of the proximal phalanx, Base of the proximal phalanx of the 5th digit, Flexion of the proximal phalanx of the 5th digit, Sides of two adjacent metacarpals (dorsal interossei) and palmar surfaces of the 2nd, 4th, 5th metacarpals (palmar interossei), Bases of the proximal phalanges via the extensor expansions of the 2nd to 4th digits (dorsal interossei) and 2nd, 4th, and 5th digits (palmar interossei), Abduction of the 2nd to 4th digits (dorsal interossei), adduction of the 2nd, 4th, and 5th digits (palmar interossei), assisting the lumbricals in extension, Tendons of the flexor digitorum profundus, Lateral expansions of the 2nd to 5th digits, Flexion of the metacarpophalangeal joints and extension of the interphalangeal joints of the 2nd to 4th digits. insertion: ribs, A big sheet Next to each muscle, youll find its origin(s), insertion(s), innervation(s) and function(s). Do Humans Have an Open or Closed Circulatory System? 1. Insertion: Proximal, medial tibia (inferior to medial condyle) Our opposable thumb is essential to our advancement as a species. There are major muscles that you need to know, so without delay, lets give it a go. It arises from the transverse processes of the superior four cervical vertebrae (C1-C4). 190 lessons The flexor pollicis brevis acts to flex the thumb at the 1st MP joint and is innervated by the median nerve. Test your knowledge on the muscles of the arm right away using our handy round-up of quizzes, diagrams and free worksheets. Muscles always pull. It is the primary lateral rotator of the shoulder, it also modulates deltoid movement. PAD DAB ('Use your hand to dab with a pad'). Its supinating effect are maximal when the elbow is extended. The latissimus dorsi is a large back muscle responsible for the bulk of adduction of the arm (pulling the arm to the sides of . Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. insertion: spinus process of scapula F lexor digitorum profundus muscle:It rises from the anterior proximal surface of the ulna and adjacent interosseous membrane and deep fascia of the forearm. Suprahyoid muscles are superior to it, and the infrahyoid muscles are located inferiorly. Its innervation is from the upper suprascapular nerve. Depresses mandible when hyoid is fixed; elevates hyoid when mandible is fixed; Posterior belly; facial nerve Anterior belly mylohyoid nerve, Elevates and retracts hyoid; elongates floor of mouth, Elevates floor of mouth in initial stage of swallowing, Depresses mandible when hyoid; elevates and protracts hyoid when mandible is fixed, Depresses hyoid after it has been elevated, Depresses the hyoid during swallowing and speaking, Depresses hyoid; Elevates larynx when hyoid is fixed, Depresses larynx after it has been elevated in swallowing and vocalization, Temporal bone (mastoid process); occipital bone, Unilaterally tilts head up and to the opposite side; Bilaterally draws head forward and down, Occiput between the superior and inferior nuchal line, Extends and rotates the head to the opposite side, Posterior rami of middle cervical and thoracic nerves, Unilaterally and ipsilaterally flexes and rotates the head; Bilaterally extends head, Posterior margin of mastoid process and temporal bone, Extends and hyperextends head; flexes and rotates the head ipsilaterally, Dorsal rami of cervical and thoracic nerves (C6 to T4), Rotates and tilts head to the side; tilts head forward, Individually: rotates head to opposite side; bilaterally: flexion, Individually: laterally flexes and rotates head to same side; bilaterally: extension, Transverse and articular processes of cervical and thoracic vertebra, Rotates and tilts head to the side; tilts head backward, Spinous processes of cervical and thoracic vertebra. My insertion is transverse processes C1-C4, mastoid process, and occipital bone. Agonists, or prime movers, are responsible for the bulk of the action. The posterior muscles of the neck are primarily concerned with head movements, like extension. However, the anatomist knows that the arm or the brachium is purely the region between the shoulder joint and elbow. The nerve supply to this muscle arises from the axillary nerve, a branch of the posterior cord of the brachial plexus. The third group, the spinalis group, comprises the spinalis capitis (head region), the spinalis cervicis (cervical region), and the spinalis thoracis (thoracic region). Many muscles are attached to bones at either end via tendons. The muscle causes flexion of the wrist, and radial deviation when it acts with extensor carpi radialis. The Tissue Level of Organization, Chapter 6. By the end of this section, you will be able to: Identify the following muscles and give their origins, insertions, actions and innervations: The skeletal muscles are divided into axial (muscles of the trunk and head) and appendicular (muscles of the arms and legs) categories. 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Molly Smith DipCNM, mBANT The humeroulnar head arises from the medial epicondyle and the radial head arises from the superior anterior surface of the radial shaft. Origin: Clavicle, sternum, cartilages of ribs 1-7 Insertion: Crest of greater tubercle of humerus Action: flexes, adducts, and medially rotates arm, Origin: Clavicle, acromion process, spine of scapula Insertion: Deltoid tuberosity of the humerus Action: Abducts arm; flexes, extends, medially, and laterally rotates arm, Origin: thoracolumbar fascia Insertion: Intertubercular groove of humerus (spirals from your back under your arm) Action: adducts humerus (pulls shoulder back and down), Origin: Lateral border of scapula Insertion: Greater tubercle of humerus Action: Laterally rotates and adducts arm, stabilizes shoulder joint, Origin: Long head; superior margin of glenoid fossa Short Head; Coracoid process of scapula Insertion: Radial Tuberosity Action: Flexes arm, flexes forearm, supinates hand, Origin: Anterior, distal surface of humerus Insertion: coronoid process of ulna Action: Flexes forearm, Origin: Infraglenoid tuberosity of scapula, lateral and posterior surface of humerus Insertion: Olecranon process, tuberosity of ulna Action: Extends and adducts arm, extends forearm, Origin: Lateral supracondylar ridge of humerus Insertion: styloid process of radius Action: Flexes forearm, Origin: Symphysis Pubis (inferior ramus of pubis) The thyrohyoid muscle also elevates the larynxs thyroid cartilage, whereas the sternothyroid depresses it. If the place is a bone that remains immobile for an action, the attachment is called an origin. It commonly occurs following a fall onto an outstretched hand (FOSH). The forearm is the region between the elbow and thewrist and is composed of an extensor and flexor compartment. Describe the muscles of the anterior neck. Deltoid muscle:This muscle is named due to its Greek delta letter shape (triangular) appearance. The extrinsic muscles move the whole tongue in different directions, whereas the intrinsic muscles allow the tongue to change its shape (such as, curling the tongue in a loop or flattening it). It acts to pronate the forearm and weakly flex the elbow. Generally the muscles in the same compartment insert into the same bone. It consists mainly of type 1 muscle fibers and hence provides sustained elbow extension. It has numerous muscles and has a complex range of movements. Pectoralis minor muscle:This muscle lies deep to the pectoralis major and arises from 3rd-5th costals sternal ends and its associated fascia (connective tissue surrounding a muscle group). Forearm muscle origins on humerus: Supinator, Medial Tricep, Lateral Tricep, Pronator, Brachialis. The two bellies are connected by a broad tendon called the epicranial aponeurosis, or galea aponeurosis (galea = apple). You'll find this conveniently illustrated on the cheat sheets. Muscle memory is a form of procedural memory that involves consolidating a specific motor task into memory through repetition, which has been used synonymously with motor learning. It is innervated by the radial nerve. Although the tongue is obviously important for tasting food, it is also necessary for mastication, deglutition (swallowing), and speech (Figure 11.4.5 and Figure 11.4.6). It acts as a lateral rotator and a weak adductor of the shoulder. Identify the following muscles and give their origins, insertions, actions and innervations: Axial muscles of the head neck and back The skeletal muscles are divided into axial (muscles of the trunk and head) and appendicular (muscles of the arms and legs) categories. Agonist Muscle Contraction & Examples | What Are Agonist Muscles? Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. Its action is elevation of the scapula as well as superior rotation of the scapula. They both arise from the medial epicondyle, with the radialis inserting onto the base of the 2nd and 3rd metacarpals, and the ulnaris into the pisiform, hook of hamate and base of the 5th metacarpal. This article will discuss the anatomy of the serratus anterior muscle. Plus, get practice tests, quizzes, and personalized coaching to help you Flexor pollicis longus muscle:This muscle is found superficially within the deep layer. Place your finger on your eyebrows at the point of the bridge of the nose. There are a number of other joints in the region which all move in unison in order to generate a stable movement. Muscles of the shoulder and upper limb can be divided into four groups: muscles that stabilize and position the pectoral girdle, muscles that move the arm, muscles that move the forearm, and muscles that move the wrists, hands, and fingers. The occipitofrontalis muscle elevates the scalp and eyebrows. Read more. Extensor carpi radialis longus and brevis muscles:The longus muscle arises from the lateral epicondylar ridge and inserts onto the dorsal surface of the 2nd metacarpal. Insertion: greater trochanter on the back of the femur The muscles are named after their functions, with the flexor muscle lateral most, the abductor medial most, and the opponens muscle lying deep. 52 Learners. Agonists and antagonists are always functional opposites. Raise your eyebrows as if you were surprised and lower your eyebrows as if you were frowning. succeed. For this reason, the anatomy of the upper limb from the aspect of muscles will be reviewed topographically. #shorts #anatomy. Subjects: action comments insertion muscles nerve origin skeletal . origin: neck Muscles of Face ----- skull----- skin of face----- facial expression Orbicularis oculi frontal and maxilla & tissue of eyelid closes eye ligaments around orbit Antagonist contractions are opposite that of the agonist and serve to control the action. Origin: Clavicle, acromion process, spine of scapula Insertion: Deltoid tuberosity of the humerus Action: Abducts arm; flexes, extends, medially, and laterally rotates arm. Mnemonics to remember bones It is innervated by the medial (C8-T1) and lateral (C5-C7) pectoral nerves. Triceps brachii muscle:This is the only muscle of the posterior compartment of the arm. The patient will present with tenderness within the anatomical snuffbox. By accessing any content on this site or its related media channels, you agree never to hold us liable for damages, harm, loss, or misinformation. You will feel the movement originate there. It blends into the thoracolumbar fascia, which acts to stabilize the sacroiliac joints along with the gluteus maximus muscles. Opponens pollicis acts to oppose the thumb with the other digits (rotation of the thumb to pulp of the other fingers and not just flex across the palm). 977 Cards -. The extrinsic muscles all include the word root glossus (glossus = tongue), and the muscle names are derived from where the muscle originates. Muscle origins and insertions Many muscles are attached to bones at either end via tendons. In most cases, one end of the muscle is fixed in its position, while the other end moves during contraction. Extensor carpi ulnaris muscle:This muscle arises from the lateral epicondyle and runs distally to insert onto the dorsal surface of the base of the 5th metacarpal and ulnar shaft. The styloglossus originates on the styloid process of the temporal bone, and allows upward and backward motion. Pronator teres muscle is the larger of the pronator muscles and has two heads. Resulting in the inability to straighten the digit. It arises from the nuchal ligament and spinous processes of C7 to T1. Kenhub. The nerve supply is from the long thoracic nerve, which arises from the C5, C6, and C7 nerve roots. This muscle is considered an accessory muscle of respiration. Chapter 1. It is innervated by the C3 & C4 and the accessory nerve (cranial nerve 11 = CN11). It inserts onto the spine of the scapula, acromion, and lateral third of the clavicle. | 15 Click the card to flip . The muscle origin often describes the more proximal attachment point of the muscle, while the muscle insertion point refers to the distal attachment. 1.2 Structural Organization of the Human Body, 2.1 Elements and Atoms: The Building Blocks of Matter, 2.4 Inorganic Compounds Essential to Human Functioning, 2.5 Organic Compounds Essential to Human Functioning, 3.2 The Cytoplasm and Cellular Organelles, 4.3 Connective Tissue Supports and Protects, 5.3 Functions of the Integumentary System, 5.4 Diseases, Disorders, and Injuries of the Integumentary System, 6.6 Exercise, Nutrition, Hormones, and Bone Tissue, 6.7 Calcium Homeostasis: Interactions of the Skeletal System and Other Organ Systems, 7.6 Embryonic Development of the Axial Skeleton, 8.5 Development of the Appendicular Skeleton, 10.3 Muscle Fiber Excitation, Contraction, and Relaxation, 10.4 Nervous System Control of Muscle Tension, 10.8 Development and Regeneration of Muscle Tissue, 11.1 Describe the roles of agonists, antagonists and synergists, 11.2 Explain the organization of muscle fascicles and their role in generating force, 11.3 Explain the criteria used to name skeletal muscles, 11.4 Axial Muscles of the Head Neck and Back, 11.5 Axial muscles of the abdominal wall and thorax, 11.6 Muscles of the Pectoral Girdle and Upper Limbs, 11.7 Appendicular Muscles of the Pelvic Girdle and Lower Limbs, 12.1 Structure and Function of the Nervous System, 13.4 Relationship of the PNS to the Spinal Cord of the CNS, 13.6 Testing the Spinal Nerves (Sensory and Motor Exams), 14.2 Blood Flow the meninges and Cerebrospinal Fluid Production and Circulation, 16.1 Divisions of the Autonomic Nervous System, 16.4 Drugs that Affect the Autonomic System, 17.3 The Pituitary Gland and Hypothalamus, 17.10 Organs with Secondary Endocrine Functions, 17.11 Development and Aging of the Endocrine System, 19.2 Cardiac Muscle and Electrical Activity, 20.1 Structure and Function of Blood Vessels, 20.2 Blood Flow, Blood Pressure, and Resistance, 20.4 Homeostatic Regulation of the Vascular System, 20.6 Development of Blood Vessels and Fetal Circulation, 21.1 Anatomy of the Lymphatic and Immune Systems, 21.2 Barrier Defenses and the Innate Immune Response, 21.3 The Adaptive Immune Response: T lymphocytes and Their Functional Types, 21.4 The Adaptive Immune Response: B-lymphocytes and Antibodies, 21.5 The Immune Response against Pathogens, 21.6 Diseases Associated with Depressed or Overactive Immune Responses, 21.7 Transplantation and Cancer Immunology, 22.1 Organs and Structures of the Respiratory System, 22.6 Modifications in Respiratory Functions, 22.7 Embryonic Development of the Respiratory System, 23.2 Digestive System Processes and Regulation, 23.5 Accessory Organs in Digestion: The Liver, Pancreas, and Gallbladder, 23.7 Chemical Digestion and Absorption: A Closer Look, 25.1 Internal and External Anatomy of the Kidney, 25.2 Microscopic Anatomy of the Kidney: Anatomy of the Nephron, 25.3 Physiology of Urine Formation: Overview, 25.4 Physiology of Urine Formation: Glomerular Filtration, 25.5 Physiology of Urine Formation: Tubular Reabsorption and Secretion, 25.6 Physiology of Urine Formation: Medullary Concentration Gradient, 25.7 Physiology of Urine Formation: Regulation of Fluid Volume and Composition, 27.3 Physiology of the Female Sexual System, 27.4 Physiology of the Male Sexual System, 28.4 Maternal Changes During Pregnancy, Labor, and Birth, 28.5 Adjustments of the Infant at Birth and Postnatal Stages. which stands for supraspinatus, infraspinatus, teres minor, and subscapularis. It is also capable of weakly supinating and pronating the forearm. Remaining 0 Correct 0 Wrong 0 Press play! The nerve supply arises from the suprascapular nerve (upper and lower), which arises from the unification of the anterior rami of spinal nerves C5 and C6(C = cervical). Bsc Functional Anatomy and Biomechanics. Semispinalis capitis: Origin: transverse processes of C7-T12. It arises from the spinous processes of the T7-L5 (L = Lumbar) vertebrae, costals 8-12, inferior angle of the scapula, and iliac crest. The information we provide is grounded on academic literature and peer-reviewed research. Bony Landmarks Types & Identification | What are Femur Landmarks? The muscle also forms the medial border of the cubital fossa. Pectoralis minor inserts onto the coracoid process of the scapula. Additional muscles of facial expression are presented in Figure 11.4.2. We will also discuss the clinical relevance of the upper limb. Check out the following quiz and the learn the muscles of the arm and shoulder. , My action is to bilaterally extend the head and neck and unilaterally laterally flex . : imagine holding a suitcase or briefcase at your side. All content published on Kenhub is reviewed by medical and anatomy experts. It has a long head and a short head. They also contribute to deep inhalation. This complete MBLEx prep course covers all sections of the FSMTB Massage & Bodywork Licensing Exam, and includes full MBLEx practice tests and quizzes. The human body has over 500 muscles responsible for all types of movement. You ride Longer on a Superhighway. The Peripheral Nervous System, Chapter 18. However, it prevents the humeral head from slipping downwards. The rotator cuff is formed by four muscles, supraspinatus, infraspinatus, teres minor, and subscapularis. It is the prime mover in forward reaching and pushing down. However, the scapula is integral to the movement of the shoulder via the rotator cuffand additional muscles. Muscle: Abductor pollicis longus - Origin: - Posterior surfaces of radius and ulna - Interosseous membrane - Insertion: Base of 1st metacarpal - Action: - Radial deviation of wrist - Abduction of thumb at CMC joint - Nerve Supply: Deep branch of radial nerve. They'll teach you everything you need to know about attachments, innervations and functions. Get unlimited access to over 88,000 lessons. The acronym for the rotator cuff is S.I.T.S. Use the following mnemonic to remember the origins of the biceps brachii muscle. The Cardiovascular System: Blood, Chapter 19. The clavicular head arises from the medial two thirds of the inferior surface of the clavicle. These muscles are located inside the eye socket and cannot be seen on any part of the visible eyeball (Figure 11.4.3 and Table 11.3). In this anatomy muscle song, you can learn rhymes and mnemonics to help you remember the muscle name, location, and one of its functions/actions. It is available for free. It causes flexion of the interphalangeal joint (IP joint) of the thumb, as well as flexion at the metacarpophalangeal joint (MP joint). When movement of a body part occurs, muscles work in groups rather than individually. origin: along spinus process of vertebrae and occipital bone The action, or particular movement of a muscle, can be described relative to the joint or the body part moved. Most common manifestations are pain, swelling, and deformity at the joint. Bone Tissue and the Skeletal System, Chapter 12. It inserts into the lateral surfaces of the middle phalanges of the 2nd to 5th digits. You walk Shorter to a street Corner. There are two main ones, so lets break em in half. Origin: Ischial Tuberosity It arises from the occipital bones, occipital protuberance and nuchal lines, as well as the spinous processes of C7 through T12. TABLE: Origin, Insertion, and Action for Lecture Checklist: Selected Human Muscles. As the muscles contract, they exert force on the bones, which help to support and move our body along with its appendages. The palmar aponeurosis helps resist shearing forces applied to the palm, such as climbing and tool use. This website provides entertainment value only, not medical advice or nursing protocols. It arises from the trapezium and transverse carpal ligament. Memorizethe superficial forearm flexors usingthe followingmnemonic! It acts as an abductor of the shoulder, and inserts onto the superior facet of the greater tubercle of the humerus. The Cardiovascular System: The Heart, Chapter 20. The multifidus muscle of the lumbar region helps extend and laterally flex the vertebral column. The middle fibers retract (adduct). For example, upper limb muscles are grouped by shoulder and arm, forearm and hand. Upper limb muscles and movements: want to learn more about it? There are numerous muscles in this compartment as well. The genioglossus depresses the tongue and moves it anteriorly; the styloglossus lifts the tongue and retracts it; the palatoglossus elevates the back of the tongue; and the hyoglossus depresses and flattens it. origin: in strips on the lateral and anterior surface of ribs Subscapularis muscle:This is another muscle of the rotator cuff, which is deep and arises from the large anterior subscapular fossa. Important in the stabilization of the vertebral column is the segmental muscle group, which includes the interspinales and intertransversarii muscles. Due to these attachments, contraction and muscle shortening of the biceps flexes the forearm. The physicians originally studying human anatomy thought the skull looked like an apple. The short head arises from the coracoid process and both heads unite. Flex and extend the muscle and feel its movements at the origin, midpoint, and insertion. This muscle chart eBook covers the following regions: This eBook contains high-quality illustrations and validated information about each muscle. S: supraspinatus I: infraspinatus T: teres minor S: subscapularis With 'SITS', recalling this order also helps remember the insertions of these muscles, with the order being superior, middle, and inferior facets of the greater tubercle of the humerus for supraspinatus, infraspinatus and teres minor respectively and . origin: cervical vertebrae Mnemonics to recall the muscles of the rotator cuff are:. Muscles involved in chewing must be able to exert enough pressure to bite through and then chew food before it is swallowed (Figure 11.4.4 and Table 11.4). The muscles of the anterior neck assist in deglutition (swallowing) and speech by controlling the positions of the larynx (voice box), and the hyoid bone, a horseshoe-shaped bone that functions as a foundation on which the tongue can move. Conventionally, a muscle origin describes the attachment of a muscle on the more stable bone. posterior muscles - gluteus maximus muscle (the largest muscle in the body) and the hamstrings group, which consists of the biceps femoris, semimembranosus, and semitendinosus muscles. This is the reason the muscle is well developed in boxers who protract their scapula in the terminal phases of their punches in order to maximize reach.

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