muscle mnemonics origin, insertion action

Latissimus dorsi muscle :This is a large, fan shaped superficial muscle which has a large area of origin. The erector spinae group forms the majority of the muscle mass of the back and it is the primary extensor of the vertebral column. It inserts onto the coronoid process and tuberosity of the ulna. Origin: Because of its mobility, the tongue facilitates complex speech patterns and sounds. It is innervated by the deep branch of the radial nerve. Additional muscles of facial expression are presented in Figure 11.4.2. Some axial muscles cross over to the appendicular skeleton. Take a free major muscles anatomy quiz to test your knowledge, or review our muscle song video. Many muscles are attached to bones at either end via tendons. At the end of this video, you will be able to: 20 chapters | They arise from the metacarpal bones and insert into the extensor hoods of each finger. Thenar eminence:It consists of three muscle: flexor pollicis brevis, abductor pollicis brevis, and the opponens pollicis. origin: along spinus process of vertebrae and occipital bone My insertion is transverse processes C1-C4, mastoid process, and occipital bone. Its like a teacher waved a magic wand and did the work for me. Muscles are either axial muscles or appendicular. The shoulder is most unstable in extension and external rotation. Insertion: greater trochanter on the back of the femur It is innervated by the musculocutaneous nerve. The palmar aponeurosis helps resist shearing forces applied to the palm, such as climbing and tool use. remember this mnemonic: Aortic hiatus=12 letters =T12 Esophageal =10 letters= T10 Vena cava = 8 letters = T8 The insertion is usually distal,. Most common manifestations are pain, swelling, and deformity at the joint. Posterior dislocation can occur in epileptics or electric shocks. The biceps brachii originates on the front of the scapula of the shoulder and inserts on the front of the radius in the forearm. '1 2 me, 3 4 u' (One to me, three for you). 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, Anterior, medical and posterior thigh muscles, Anterior, lateral and posterior leg muscles, Thenar, hypothenar and metacarpal muscles of the hand, Muscles of facial expression and mastication. It is innervated by the anterior interosseous branch. Due to these attachments, the triceps is stretched during forearm flexing. In our cheat sheets, youll find the origin(s) and insertion(s) of every muscle. All three heads unite and insert onto the olecranon process and fascia of the ulna. I feel like its a lifeline. The extrinsic muscles of the hand originate outside the hand, commonly the forearm, and insert into hand structures. There are numerous muscles in this compartment. The suprahyoid muscles raise the hyoid bone, the floor of the mouth, and the larynx during deglutition. The shoulder joint (glenohumeral joint) is an inherently unstable joint, and thus requires a significant degree of muscular support in the form of the rotator cuff. Our opposable thumb is essential to our advancement as a species. It is important to note that the scapula does articulate with the acromial end of the clavicle forming the acromioclavicular joint (AC joint), as well as the humeral head with the scapular glenoid cavity (fossa) which forms the glenohumeral joint. The second way to describe a muscle's action is based on the joint, or the articulation. Action: external rotator of the thigh With these movements, you can feel the action of the corrugator supercilli. If the place is a bone that remains immobile for an action, the attachment is called an origin. The hand serves as the origin and/or insertion for a vast number of muscles. 1 / 24. It has both sternocostal and clavicular heads. It is innervated by the median nerve a branch of the lateral and medial cord of the brachial plexus. Tap the Skeletal System Icon, and press the Plus button until you come to the Origin and Insertion layer (the fourth layers of the system). The dorsal interossei cause abduction of the fingers and the palmar interossei cause adduction of the fingers. Read more. Flexor carpi muscles: In the superficial layer of the forearm is where we find flexor carpi radialis, and flexor carpi ulnaris. You can listen to the song below, and then take the free major muscle quiz. It also spreads the digits aparts during extension of the MP joints. This expression of trauma makes the hand appear to be dorsiflexed. Memorizethe superficial forearm flexors usingthe followingmnemonic! Muscles always pull. This happens due to overuse, such as with a competitive swimmer or shotput thrower. 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. TABLE: Origin, Insertion, and Action for Lecture Checklist: Selected Human Muscles. This muscle song will help you learn the major muscles of the human body . It is the prime mover in forward reaching and pushing down. Axial muscles originate on the axial skeleton (the bones in the head, neck, and core of the body), whereas appendicular muscles originate on the bones that make up the bodys limbs. It arises from the lateral epicondylar ridge and inserts onto the radial styloid process. The longus is innervated by the radial nerve and the brevis by the posterior interosseous branch. It is innervated by the radial nerve. Most of these movements are realized when we run. The styloglossus originates on the styloid process of the temporal bone, and allows upward and backward motion. Due to these attachments, contraction and muscle shortening of the biceps flexes the forearm. The insertion then, is the attachment of a muscle on the more moveable bone. insertion: mediar aspect of humerus, Origin posterior border of iliac crest All rights reserved. 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). In addition, both muscles working together are the flexors of the head. The Nervous System and Nervous Tissue, Chapter 13. The opponens digiti minimi arises from the hook of hamate and flexor retinaculum. We will study these muscles in depth. The muscle has a frontal belly and an occipital belly (near the occipital bone on the posterior part of the skull). This results in a restricted range of motion. Describe the muscles of the anterior neck. It acts to extend the wrist and also contributes to radial deviation of the wrist. The brevis muscle arises from the lateral epicondyle and inserts onto the dorsal base of the 3rd metacarpal. Reading time: 3 minutes. Let's take a look at forearm flexion and identify the roles of the different muscles involved. Action: Extends thigh, flexes leg, Narrower than semimembranosus The shoulder moves at the glenohumeral joint. Shahab Shahid MBBS insertion: top of scapula Muscles that move the eyeballs are extrinsic, meaning they originate outside of the eye and insert onto it. The muscles of facial expression originate from the surface of the skull or the fascia (connective tissue) of the face. The head is balanced, moved and rotated by the neck muscles (Table 11.5). The muscle arises from costals (ribs) 1 - 8, sometimes terminating origins at costal 9. It also causes contributes to flexion of the proximal IP, MP, and wrist joints, although these are its secondary function. It allows for powerful elbow extension (such as doing a pushup). The nerve supply is from the long thoracic nerve, which arises from the C5, C6, and C7 nerve roots. Take a look at the following two mnemonics! Phew. Copyright 2023 RegisteredNurseRN.com. These include the digastric muscle, which has anterior and posterior bellies that work to elevate the hyoid bone and larynx when one swallows; it also depresses the mandible. It inserts onto the radial surface of the 1st proximal phalanx. The iliocostalis group includes the iliocostalis cervicis, the iliocostalis thoracis, and the iliocostalis lumborum. Rather, antagonist contraction controls the movement by slowing it down and making it smooth. 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. The masseter muscle is the prime movermuscle for chewing because it elevates the mandible (lower jaw) to close the mouth, and it is assisted by the temporalis muscle, which retracts the mandible. 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 [?] The spinalis group includes the spinalis capitis, the spinalis cervicis, and the spinalis thoracis. Action: Adducts thigh, Origin: iliac crest, anterior iliac surface Insertion: iliotibial band of fasciae latae Action: Flexes, abducts, and medially rotates thigh, Origin: Outer iliac blade, iliac crest, sacrum, coccyx Insertion: Gluteal tuberosity of femur, iliotibial band of fasciae latae Action: Extends and laterally rotates thigh, braces knee, Origin: Outer iliac blade Insertion: Greater trochanter of femur Action: Abducts and medially rotates thigh, Origin: Pubis, ischium Insertion: Gluteal tuberosity, linea aspera, adductor tubercle of distal femur Action: Adducts, flexes, extends and laterally rotates thigh, Origin: Anterior superior iliac spine Insertion: Proximal, medial tibia Action: Flexes and laterally rotates thigh, flexes leg, Origin: Anterior inferior iliac spine, margin of acetabulum Insertion: Tibial tuberosity by patellar tendon Action: Flexes thigh, extends leg, Origin: Greater trochanter of femur, linea aspera of femur Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg, Origin: Linea aspera, medial side Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg, Origin: Proximal, anterior femur Insertion: Tibial tuberosity by patellar tendon Action: Extends Leg, Origin: (long head) Ischial tuberosity, (short head) linea aspera Simplify your retention of the thenar muscles by learning the following mnemonic! Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. This is where the rotator cuff muscles become inflamed and impinged as they pass through the subacromial space. The muscles in the face create facial expression by inserting into the skin rather than onto bone. It is innervated by the posterior scapular nerve. All other trademarks and copyrights are the property of their respective owners. The common flexor origin is the medial epicondyle. The muscle also forms the medial border of the cubital fossa. Muscle origins and insertions dictate the type of movement that occurs when a muscle contracts. As the muscles pass anteriorly to the MP joints and insert they cause flexion of the MP joint and extension of the IP joints. It arises from the transverse processes of the superior four cervical vertebrae (C1-C4). The muscles acts to flex the proximal IP joints as it primary function. The first grouping of the axial muscles you will review includes the muscles of the head and neck, then you will review the muscles of the vertebral column, and finally you will review the oblique and rectus muscles. It inserts onto the radial aspect of the 1st metacarpal. The rotator cuff is formed by four muscles, supraspinatus, infraspinatus, teres minor, and subscapularis. The Colles fracture is a fracture of the distal radius (within two centimetres of the wrist joint) with associated dorsal translocation of the distal fragment. Conversely, you can say the elbow is proximal to the wrist. 2023 Human hands are quite special in their anatomy, which allows us to be so dexterous and relies on muscles of the upper limb to help move it through space. Flex and extend the muscle and feel its movements at the origin, midpoint, and insertion. It inserts onto the ulnar aspect of the 5th proximal phalanx. The muscles discussed below are essential to everyday life and advanced movements such as writing. Our muscle anatomy charts make it easier by listing them clearly and concisely. When the whole muscle acts as a unit it acts as a medial rotator and adductor the arm at the shoulder. This website provides entertainment value only, not medical advice or nursing protocols. (Superior part: Anterior surface of superior angle. 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. It acts as a lateral rotator and a weak adductor of the shoulder. It is innervated by the musculocutaneous nerve, a branch of the lateral cord of the brachial plexus. The back muscles stabilize and move the vertebral column, and are grouped according to the lengths and direction of the fascicles. Coracobrachialis muscle :The beauty of this muscle is that its name explains its origin, insertion, and action. The action of the muscle describes what happens when the more mobile bone is brought toward the more stable bone during a muscular contraction. Subjects: action comments insertion muscles nerve origin skeletal . It acts to draw the scapula lateral, forward, downward, and stabilizes the scapula. SITS; TISS; Mnemonic. However, it prevents the humeral head from slipping downwards. It is innervated by the C3 & C4 and the accessory nerve (cranial nerve 11 = CN11). Muscles of the Posterior Neck and the Back. Finally, the scalene muscles work together to flex, laterally flex, and rotate the head. 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). The action makes sense when you consider the muscle's points of attachment. The muscles of the back and neck that move the vertebral column are complex, overlapping, and can be divided into five groups. It acts to flex the elbow. laterally rotates the femur with hip extension, flexes humerus, antagonist of supraspinatus A rule of thumb is that any muscle tendon that crosses a joint will act on that joint. The major muscle that laterally flexes and rotates the head is the sternocleidomastoid. Get unlimited access to over 88,000 lessons. Interossei:These are grouped into four dorsal and threepalmar interossei and are part of the midpalmar group. They also contribute to deep inhalation. Resulting in the inability to straighten the digit. Why are the muscles of the face different from typical skeletal muscle? This complete MBLEx prep course covers all sections of the FSMTB Massage & Bodywork Licensing Exam, and includes full MBLEx practice tests and quizzes. Its supinating effect are maximal when the elbow is extended. 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. The intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones. It also acts as an extensor of the wrist and radial deviator. Do you want an efficient way to remember the arm muscles? MUSCLE NAME ORIGIN INSERTION ACTION NOTES MUSCLES OF THE ANTERIOR AND LATERAL ABDOMINAL WALL Rectus abdominis External oblique Internal oblique Transversus abdominis Internal surfaces of costal cartilages of ribs 7-12 . Working Scholars Bringing Tuition-Free College to the Community, Differentiate between origin and insertion, as well as proximal and distal, Explain how agonists, antagonists and synergists work together to control muscle movement. Insertion: mastoid process of temporal bone, occipital bone. Get your muscle charts below. 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. 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. 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. Flexor digitorum superficialis muscle:This muscle is located in the intermediate layer and has two heads. 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). This is a bony deformity of the finger or toes associated with rheumatoid arthritis and trauma to the end of the extended finger. It pronates the radius and is innervated by the anterior interosseous branch of the median nerve. : imagine holding a suitcase or briefcase at your side. The longissimus group includes the longissimus capitis, the longissimus cervicis, and the longissimus thoracis. The multifidus muscle of the lumbar region helps extend and laterally flex the vertebral column. The lateral head arises from the posterior surface of the humerus, above the radial groove of the humerus. It is innervated by the posterior interosseous branch. Weve created muscle anatomy charts for every muscle containing region of the body: Each chart groups the muscles of that region into its component groups, making your revision a million times easier. The problem? It is innervated by the medial (C8-T1) and lateral (C5-C7) pectoral nerves. It arises from the flexor retinaculum, scaphoid tubercle, and trapezium. psoas major - origin : lumbar vertebrae When movement of a body part occurs, muscles work in groups rather than individually. This muscle allows you to whistle, blow, and suck; and it contributes to the action of chewing. Skeletal Muscles (Comments, Origin, Insertion, Action, Nerve) by melissa1780d, Mar. 0% 0:00.0 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

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