muscle mnemonics origin, insertion action

Resulting in the inability to straighten the digit. The styloglossus originates on the styloid process of the temporal bone, and allows upward and backward motion. This results in a restricted range of motion. Copyright The posterior muscles of the neck are primarily concerned with head movements, like extension. Last reviewed: July 22, 2022 Tongue muscles are both extrinsic and intrinsic. Medial border: Insertion of 3 muscles Mnemonic: SLR - all supplied by nerves from ROOT of brachial plexus Anteriorly: Serratus anterior (Long thoracic nerve) Posteriorly: Superiorly: Levator scapulae (Dorsal scapular nerve) Inferiorly: Rhomboids - minor superior to major (Dorsal scapular nerve) SLR and SIT mnemonic for scapular muscle attachment b. If the place is a bone that remains immobile for an action, the attachment is called an origin. Explain the difference between axial and appendicular muscles. Generally the muscles in the same compartment insert into the same bone. The muscle origin often describes the more proximal attachment point of the muscle, while the muscle insertion point refers to the distal attachment. Short head originates from Coracoid process. insertion: top of scapula The segmental muscles include the interspinales and intertransversarii. In anatomical terminology, chewing is called mastication. 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). It is innervated by the deep branch of the radial nerve. Biceps brachii muscle:This superficial muscle forms the bulk of the anterior compartment of the arm. Iliococcygeus is a thin sheet of muscle that traverses the pelvic canal from the tendinous arch of the levator ani to the midline iliococcygeal raphe where it joins with the muscle of the other side and connects with the superior surface of the sacrum and coccyx. You ride Longer on a Superhighway. The muscles acts to flex the proximal IP joints as it primary function. The common extensor origin is the lateral epicondyle. Bone Tissue and the Skeletal System, Chapter 12. This is a fracture of the proximal third of the ulna with associated dislocation of the proximal radioulnar joint. Its innervation is from the upper suprascapular nerve. It acts as an adductor (to add to the body), assists in extension and medial rotation, as well as stabilization of the scapula. They arise from the metacarpal bones and insert into the extensor hoods of each finger. View Origin and Insertion points as a layer map Origin and Insertion points are available as a layer of the Skeletal System, which show a map of all attachment points across the full skeleton. Author: The thyrohyoid muscle also elevates the larynxs thyroid cartilage, whereas the sternothyroid depresses it. For example, that same muscle, the biceps brachii, performs flexion at the elbow, in which the elbow is the joint. The multifidus muscle of the lumbar region helps extend and laterally flex the vertebral column. Finally, the scalene muscles work together to flex, laterally flex, and rotate the head. The middle fibers retract (adduct). Most of these movements are realized when we run. It's important to note that the antagonist contraction is minor in comparison to the agonist contraction, and therefore it doesn't prevent the action of the agonist. Insertion: Medial proximal condyle of tibia Action: Extends thigh, flexes leg, Origin: Lateral condyle and proximal tibia Insertion: First metatarsal and first cuneiform Action: Dorsiflexes and inverts foot, Origin: Condyles of femur Insertion: Calcaneus by calcaneal tendon Action: Flexes leg, plantar flexes foot, Origin:Posterior, proximal tibia and fibula Insertion: Calcaneus by calcaneal tendon Action: Plantar flexes foot, Origin: Head and shaft of fibula, lateral condyle of tibia Insertion: First metatarsal, first cuneiform Action: Plantar flexes and everts foot, Origin: Lateral COndyle of tibia, shaft of fibula Insertion: Middle of distal phalanges of second through fifth digits Action: Extends toes, dorsiflexes foot, Origin: Inferior border of a rib Insertion: Superior border of rib below Action: Elevates ribs (increases volume in thorax), Origin: Inferior border of a rib Insertion: Superior border of rib below Action: Depresses ribs (decreases volume in thorax), Origin: Posterior occipital bone, ligamentum nuchae, C7-T12 Insertion: Clavicle, Acromion process, and spine of scapula Action: Extends and abducts head, rotates and adducts scapula, fixes scapula, Origin: Spines of T2-5 Insertion: Lower one-third of vertebral border of scapula Action: retraction of scapula, Origin: Ligamentum nuchae, Spines C7-T1 Insertion: Vertebral border of scapula at scapular spine Action: retraction of scapula, Origin: Galea aponeurotica Insertion: Skin superior to orbit Action: Raises eyebrows, draws scalp anteriorly, Origin: Fascia of facial muscles near mouth Insertion: Skin of lips Action: Closes lips, Origin: Frontal and maxilla on medial margin of orbit Insertion: Skin of eyelid Action: Closes eyelid, Origin: Zygomatic arch Insertion: Angle and ramus of mandible Action: Closes mandible, Origin: Temporal fossa Insertion: coronoid process and ramus of mandible Action: Closes mandible, Origin: Sternum, clavicle Insertion: Mastoid process of temporal Action: Abducts, rotates, and flexes head, Origin: Ribs 1-8 Insertion: Vertebral border and inferior angle of scapula Action: Abducts scapula (moves scapula away from spinal column), Origin: Bottom of rib cage, Crest of pubis, symphysis pubis Insertion: xiphoid process, Origin: Ribs 5-12 Insertion: Linea alba, iliac crest, pubis Action: Compresses abdominal wall, laterally rotates trunk, Origin: Inguinal ligament, iliac crest Insertion: Linea alba, ribs 10-12 Action: Compresses abdominal wall, laterally rotates trunk, Origin: the inner surface of the 7th to 12th costal cartilages, the thoracolumbar fascia, the iliac crest horizontally, and the inguinal ligament Insertion: linea alba Action: support for the abdominal wall, directly on top of the sciatic nerve The genioglossus (genio = chin) originates on the mandible and allows the tongue to move downward and forward. A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. As a member, you'll also get unlimited access to over 88,000 My insertion is transverse processes C1-C4, mastoid process, and occipital bone. The splenius muscles originate at the midline and run laterally and superiorly to their insertions. The clavicular head enables the muscle to act as a flexor (decrease angle between joints) of arm at the shoulder and the sternocostal head enables the muscle to act as an extensor (increase angle between joints). The nerve supply comes from the upper and lower subscapular. It also spreads the digits aparts during extension of the MP joints. action: extend the neck ; retract and adduct scapulae, posterior The triceps brachii becomes the agonist - while the biceps brachii is the antagonist - when we extend our forearm. remember this mnemonic: Aortic hiatus=12 letters =T12 Esophageal =10 letters= T10 Vena cava = 8 letters = T8 The back muscles stabilize and move the vertebral column, and are grouped according to the lengths and direction of the fascicles. 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. Palmaris longus muscle: This muscle can be absent in some of the population. When a movement is repeated over time, the brain creates a long-term muscle memory for that task, eventually allowing it to be performed with little to no conscious . This is where the rotator cuff muscles become inflamed and impinged as they pass through the subacromial space. The patient will present with tenderness within the anatomical snuffbox. All other trademarks and copyrights are the property of their respective owners. It is also innervated by the median nerve. Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. The hand is truly the epitome of anatomical complexity. It inserts onto the deltoid tuberosity, which is a roughened elevated patch found on the lateral surface of the humerus. Triceps brachii muscle:This is the only muscle of the posterior compartment of the arm. Action: Extends thigh, flexes leg, Wider than semmitendonosis Sample Decks: Muscles Actions, Origins, and Insertions of the Pelvic Complex and Hip (week 5), The Structure of The Knee Joint (week 6), The Foot and Ankle (week 6) Show Class. All our four muscle chart ebooks are also available with the Latin terminology. The Nervous System and Nervous Tissue, Chapter 13. However, the anatomist knows that the arm or the brachium is purely the region between the shoulder joint and elbow. It inserts into the lateral surfaces of the middle phalanges of the 2nd to 5th digits. PAD DAB ('Use your hand to dab with a pad'). Flexor digitorum superficialis muscle:This muscle is located in the intermediate layer and has two heads. Trapezius muscle:This is a superficial, large, fan like muscle found on the back. It is caused by damage to the extensor tendon complex as it inserts onto the distal phalanx of any of the digits. 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. Additional muscles of facial expression are presented in Figure 11.4.2. and grab your free ultimate anatomy study guide! 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