muscle mnemonics origin, insertion action

There are numerous muscles in this compartment as well. The genioglossus (genio = chin) originates on the mandible and allows the tongue to move downward and forward. Some of the axial muscles may seem to blur the boundaries because they cross over to the appendicular skeleton. Bony Landmarks Types & Identification | What are Femur Landmarks? and grab your free ultimate anatomy study guide! It can be observed when a patient circumducts (circle movement) the affected upper limb. As a member, you'll also get unlimited access to over 88,000 However, it prevents the humeral head from slipping downwards. The blood supply to the bone runs distal to proximal, as the nutrient branch of the radial artery enters at the distal pole, and runs proximally. Inferior dislocations are the least common and make the upper limb appears as if you are holding your upper limb upwards. To easily remember the three origins of the deltoid, use the mnemonic provided below. Levator scapulae muscle:This is a deep small muscle that inserts onto the superior angle and superior medial scapular border. Its supinating effect are maximal when the elbow is extended. Adjacent muscles which serve similar functions are often innervated by the same nerve. 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. In summary, skeletal muscles are attached to bones on each end by tendons. It is innervated by the medial and lateral pectoral nerves. A: abductor pollicis brevis. Remaining 0 Correct 0 Wrong 0 Press play! Plus, get practice tests, quizzes, and personalized coaching to help you For example, upper limb muscles are grouped by shoulder and arm, forearm and hand. The triceps brachii originates on the back of the scapula and humerus, and inserts on the back of the ulna in the forearm. See our full, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Skype (Opens in new window), IV Drug Use Complications & Dangers: (Endocarditis, Infection, Infectious Diseases). This muscle also modulates the movement of the deltoid like the other rotator cuff muscles. If the place is on the bone that moves during the action, the attachment is called an insertion. This results in a restricted range of motion. It is innervated by the radial nerve, a portion of the posterior branch of the brachial plexus. Bone Tissue and the Skeletal System, Chapter 12. The biceps brachii originates on the front of the scapula of the shoulder and inserts on the front of the radius in the forearm. Phew. The action makes sense when you consider the muscle's points of attachment. Both these muscles are known as the punching muscles as they contribute to radial deviation of the wrist, which is essential for boxers. Teres major:This muscle arises from the posterior surface of the inferior scapular angle and inserts onto the medial lip of the intertubercular sulcus of the humerus. It acts to extend the pinky as well as the wrist. The iliocostalis group includes the iliocostalis cervicis, associated with the cervical region; the iliocostalis thoracis, associated with the thoracic region; and the iliocostalis lumborum, associated with the lumbar region. These insert into the 2nd - 5th proximal phalanges. This muscle divides the neck into anterior and posterior triangles when viewed from the side (Figure 11.4.8). The semispinalis muscles include the semispinalis capitis, the semispinalis cervicis, and the semispinalis thoracis. Finally, a reliable source (and good looking too!). Place your fingers on both sides of the neck and turn your head to the left and to the right. Test your knowledge on the muscles of the arm right away using our handy round-up of quizzes, diagrams and free worksheets. Biceps brachii muscle:This superficial muscle forms the bulk of the anterior compartment of the arm. It is innervated by the posterior interosseous branch. action: protraction of scapula, muscle that allows you to shrug your shoulders or extend your head #shorts #anatomy. Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. Muscle Origin, Insertion, and Action - 1 by AshPopRox 4,509 plays 11 questions ~30 sec English 11p More 6 too few (you: not rated) Tries Unlimited [?] Molly Smith DipCNM, mBANT Get your muscle charts below. The muscle causes flexion of the wrist, and radial deviation when it acts with extensor carpi radialis. Each of these muscles has a name; for example, again, the biceps brachii and now the triceps brachii, responsible for both forearm flexion and forearm extension, respectively. As the muscles pass anteriorly to the MP joints and insert they cause flexion of the MP joint and extension of the IP joints. This compartment is anterior in anatomical position. The short head arises from the coracoid process and both heads unite. The axial muscles are grouped based on location, function, or both. The sternocostal head arises from the sternum and the superior 6-7 costal cartilages. The origin is the attachment site that doesn't move during contraction, while the insertion is the attachment site that does move when the muscle contracts. Take a look at the following two mnemonics! In other words, there is a muscle on the forehead (frontalis) and one on the back of the head (occipitals). Themedial pterygoid and lateral pterygoid muscles provide assistance in chewing and moving food within the mouth by moving the mandible laterally and medially to grind food between the molars. From the sides and the back of the neck, the splenius capitis inserts onto the head region, and the splenius cervicis extends onto the cervical region. All three heads unite and insert onto the olecranon process and fascia of the ulna. The opponens digiti minimi arises from the hook of hamate and flexor retinaculum. It arises from the flexor retinaculum, scaphoid tubercle, and trapezium. It acts to draw the scapula lateral, forward, downward, and stabilizes the scapula. For origins and insertions, I learned the exceptions in each compartment/the ones that stick out. It also acts as an extensor of the wrist and radial deviator. The second way to describe a muscle's action is based on the joint, or the articulation. Test your knowledge on the muscles of the hand with the following quiz. Its innervation is from the upper suprascapular nerve. It also causes contributes to flexion of the proximal IP, MP, and wrist joints, although these are its secondary function. The muscle causes flexion of the wrist and ulnar deviation when its acts with extensor carpi ulnaris. Learn Muscles for Massage Our online MBLEx Course is designed to help massage students learn and memorize all the muscles of the body (origins, insertions and actions). The back muscles stabilize and move the vertebral column, and are grouped according to the lengths and direction of the fascicles. 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.

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