The muscles are named after their functions, with the flexor muscle medial most, the abductor lateral most, and the opponens muscle lying deep. As the supraspinatus passes under the subacromial arch it is vulnerable to rupture from a bony spur. Kenhub. The layman will refer to the entire upper limb as the arm. This website helped me pass! action: extend the neck ; retract and adduct scapulae, posterior Antagonist contractions are opposite that of the agonist and serve to control the action. 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. Inferior dislocations are the least common and make the upper limb appears as if you are holding your upper limb upwards. Use the following mnemonic to remember the origins of the biceps brachii muscle. It acts to extend the pinky as well as the wrist. All our four muscle chart ebooks are also available with the Latin terminology. The common extensor origin is the lateral epicondyle. 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. 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. It acts as an adductor (to add to the body), assists in extension and medial rotation, as well as stabilization of the scapula. Stretching the muscle causes the triceps muscle to contract and, thus, slow flexion. 0% 0:00.0 Gross Anatomy I. The muscle forms the posterior axillary fold and rotates in order to insert onto the floor of the intertubercular sulcus of the humerus. These are unique muscles which originate from flexor tendon and insert into extensor tendon and act as guy ropes to correct tension between two opposing forces to maintain balance.. Its like a teacher waved a magic wand and did the work for me. 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. It is caused by proximal interphalangeal joint flexion, and distal interphalangeal joint extension. Term. As a result it acts as a flexor, extensor, and abductor of the shoulder. The human body has over 500 muscles responsible for all types of movement. The erector spinae has three subgroups. The biceps brachii originates on the front of the scapula of the shoulder and inserts on the front of the radius in the forearm. The iliocostalis group includes the iliocostalis cervicis, the iliocostalis thoracis, and the iliocostalis lumborum. The shoulder is most unstable in extension and external rotation. 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. The longissimus group includes the longissimus capitis, the longissimus cervicis, and the longissimus thoracis. This happens due to overuse, such as with a competitive swimmer or shotput thrower. 1. Hamstring Anatomy Mnemonics - Origin, Insertion, Innervation & Action No views Aug 11, 2022 0 Dislike Share Save Memorize Medical 125 subscribers Easy ways to learn and remember the. Tongue muscles can be extrinsic or intrinsic. Next to each muscle, youll find its origin(s), insertion(s), innervation(s) and function(s). The shoulder moves at the glenohumeral joint. This is a bony deformity of the finger or toes associated with rheumatoid arthritis and trauma to the end of the extended finger. The good news? The muscle acts to supinate the forearm and forms the lateral border of the cubital fossa. Both these muscles are known as the punching muscles as they contribute to radial deviation of the wrist, which is essential for boxers. 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. It acts as a lateral rotator and a weak adductor of the shoulder. It also assists in medial (anterior fibers) and lateral rotation (posterior fibers). All other trademarks and copyrights are the property of their respective owners. In addition, you might want to watch our anatomy and physiology lectures on YouTube, or check our anatomy and physiology notes. In that manner of speaking, this article will explain all the anatomical aspects of the muscles of the scapula, arm, forearm and hand. Separate the muscles into compartments (already done for the leg muscles). It arises from the nuchal ligament and spinous processes of C7 to T1. 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. Why not cut your time in half by studying with our upper limb muscle anatomy chart? We will study these muscles in depth. The three muscles of the longissimus group are the longissimus capitis, associated with the head region; the longissimus cervicis, associated with the cervical region; and the longissimus thoracis, associated with the thoracic region. It is innervated by the posterior scapular nerve. It has three heads: long, lateral, and medial. 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. Place your finger on your eyebrows at the point of the bridge of the nose. It is the primary lateral rotator of the shoulder, it also modulates deltoid movement. It arises from the transverse processes of the superior four cervical vertebrae (C1-C4). '1 2 me, 3 4 u' (One to me, three for you). Definition. Rhomboid major muscle:This is a ribbon like rhomboid shaped muscle that arises from the spinous processes of the T2-T5 (T = thoracic) vertebraeand inserts onto the medial border of the scapula. the iliopsoas or inner hip muscles: Psoas major. The movements would be used in bowling or swing your arms while walking. When these muscles act unilaterally, the head rotates. This muscle divides the neck into anterior and posterior triangles when viewed from the side (Figure 11.4.8). Agonist Muscle Contraction & Examples | What Are Agonist Muscles? It also spreads the digits aparts during extension of the MP joints. Memorize Muscles, Origins, and Insertions with Cartoons and Mnemonics: 46 Muscles of the Lower Quadrant [Print Replica] Kindle Edition by Byron Moffett (Author) Format: Kindle Edition 24 ratings See all formats and editions Kindle $9.99 Read with Our Free App Working together enhances a particular movement. action: protraction of scapula, muscle that allows you to shrug your shoulders or extend your head It inserts onto the medial border of the scapula just superior to the rhomboid major. Place your fingers on both sides of the neck and turn your head to the left and to the right. Last reviewed: July 22, 2022 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. The muscles acts to flex the proximal IP joints as it primary function. The clavicular head arises from the medial two thirds of the inferior surface of the clavicle. Have you triedour upper limb muscle anatomy revision chartyet? 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 I nfraspinatus muscle : This muscle is located in the large posterior infraspinous fossa located inferior to the scapular spine. The first describes action in terms of the bone to which the muscle is attached or the appendage that is moved. For example, one could say the wrist is distal to the elbow. It controls extension, lateral flexion, and rotation of the vertebral column, and maintains the lumbar curve. It can be difficult to learn the names and locations of the major muscles. Origin: Inferior angle of scapula. It acts as a weak flexor of the wrist and tenses the palmar aponeurosis (fascia) during grip. Insertion: Proximal, medial tibia All Rights Reserved. It most commonly dislocates anteriorly (95%), and can damage the axillary nerve. Semispinalis capitis: Origin: transverse processes of C7-T12. Most of these movements are realized when we run. 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. insertion: top of scapula The movement of the eyeball is under the control of the extra ocular (extrinsic) eye muscles, which originate from the bones of the orbitand insert onto the outer surface of the white of the eye. Pronator teres muscle is the larger of the pronator muscles and has two heads. The neurovascular bundle (intercostal nerve, artery and vein) will separate these two muscles. If youve ever attempted to learn the origins, insertions, innervations, and functions of all 600+ muscles in the body youll know what a soul-destroying task it can be. This muscle primary retracts the scapula, elevates the medial border, and also stabilizes the scapula against the thoracic wall. 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. origin: along spinus process of vertebrae and occipital bone Flashcard Maker: sean bennet. Serratus anterior muscle:This muscle is so named due to its anterior digitations that have a serrated or finger-like appearance. Like how the sartorious muscle is the only . It is the chief medial rotator of the shoulder and modulates the movement of the deltoid. 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. It also flexes the MP and wrist joints, although these are its secondary functions. Kim Bengochea, Regis University, Denver. The triceps is the antagonist, and its action opposes that of the agonist. For . psoas major - origin : lumbar vertebrae 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. It may seem strange that it is included in the anatomy of the upper limb. The latissimus dorsi is a large back muscle responsible for the bulk of adduction of the arm (pulling the arm to the sides of . Mnemonic for Pectoral Muscles Origin Insertion Function Mnemonics for Facial Muscleshttps://youtu.be/ulMHYpvoRbsMnemonics for Tongue Muscle. It inserts into the lateral surfaces of the middle phalanges of the 2nd to 5th digits. Origin: Flexor digitorum profundus (FDP) Insertion: Extensor hood on radial side (lateral bands) Function: Flex MCP joint and extend PIP joint Innervation. These different roles can be described as agonists (or prime movers), antagonists, or synergists. Muscle Name or Group Origin Insertion Action. Anatomy & Physiology by Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Devon Quick & Jon Runyeon is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. 1. Flexor pollicis longus muscle:This muscle is found superficially within the deep layer. You can feel the temporalis move by putting your fingers to your temple as you chew. Extensor digiti minimi muscle:This muscle arises from the anterior surface of the lateral epicondyle of the humerus. The suprahyoid muscles raise the hyoid bone, the floor of the mouth, and the larynx during deglutition. It also causes contributes to flexion of the proximal IP, MP, and wrist joints, although these are its secondary function. The semispinalis muscles include the semispinalis capitis, the semispinalis cervicis, and the semispinalis thoracis. Insertion: greater trochanter on the back of the femur 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 . 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. I feel like its a lifeline. 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). O: opponens pollicis. Get your muscle charts below. This results in a restricted range of motion. The erector spinae comprises the iliocostalis (laterally placed) group, the longissimus (intermediately placed) group, and the spinalis (medially placed) group. Injection Gone Wrong: Can You Spot The Mistakes? The Cardiovascular System: Blood, Chapter 19. Manifestations are limited movement of the shoulder and severe pain. This also helps you understand its action (s) as well as what injuries may be present if there is pain in relevant areas. The segmental muscles include the interspinales and intertransversarii. This muscle allows you to whistle, blow, and suck; and it contributes to the action of chewing. Resulting in the inability to straighten the digit. A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. The sternocostal head arises from the sternum and the superior 6-7 costal cartilages. Enrolling in a course lets you earn progress by passing quizzes and exams. 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. Insertion: Proximal, medial tibia (inferior to medial condyle) Some of the axial muscles may seem to blur the boundaries because they cross over to the appendicular skeleton. Our muscle anatomy charts make it easier by listing them clearly and concisely. It divides and allows the tendon of flexor digitorum profundus to pass through at Campers chiasm (tendon split). Muscles of the Head and Neck: Anatomy, Motion & Support, Psychological Research & Experimental Design, All Teacher Certification Test Prep Courses, Skeletal Muscle Organization: Connective Tissue and Layers, Muscle Origin and Insertion: Definition and Actions, Muscles of the Vertebral Column: Support & Movement, Axial Muscles: Trunk Muscles Anatomy & Support, Shoulder Muscles: Anatomy, Support & Movement, Forearm Muscles: Anatomy, Support & Movement, Thigh Muscles: Anatomy, Support & Movement, The Central Nervous System in the Human Body, The Human Cardiovascular System - Blood & Heart, The Human Cardiovascular System - Vessels & Circulation, Prentice Hall Biology: Online Textbook Help, High School Physics: Homeschool Curriculum, Physical Science for Teachers: Professional Development, Gerontology for Teachers: Professional Development, Nutritional Science for Teachers: Professional Development, Intro to Physics for Teachers: Professional Development, Biology for Teachers: Professional Development, Pathophysiology for Teachers: Professional Development, Aldosterone: Definition, Function & Effects. origin: anterior sacrum 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). The muscles of the head and neck are all axial. It is often grouped as one of the muscles of the arm due to its insertion, but its actions involve the shoulder portion only, this why it has been included in the shoulder section here. Important in the stabilization of the vertebral column is the segmental muscle group, which includes the interspinales and intertransversarii muscles. Extensor indicis proprius muscle:This muscle arises from the posterior distal 3rd of the ulna and interosseous membrane and inserts onto the middle and distal phalanx of the index finger. Its action is elevation of the scapula as well as superior rotation of the scapula. This is a fracture of the distal third of the radial shaft with dislocation of the distal radioulnar joint. If the place is on the bone that moves during the action, the attachment is called an insertion. Pronator quadratus muscle:In the deepest layer of the forearm is the pronator quadratus, which is found connecting the radius (insertion) and ulna (origin) at their distal points like a strap. The muscle inserts on the medial part of the anterior border of the scapula. However, the scapula is integral to the movement of the shoulder via the rotator cuffand additional muscles. Do you struggle with straight memorization? Generally the muscles in the same compartment insert into the same bone. A rotator cuff tear presents with general pain with overhead activities and may present with night pain. Origin: We will use examples to describe how the origin and insertion affect the action of a skeletal muscle. 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). The long head arises from the supraglenoid tubercle of the scapula and passes through the intertubercular sulcus in its own synovial sheath. The tendon is kept close to the bones by a series of flexor tendon sheaths, which lubricate the tendon and prevent bowstringing (excessive loss of proximal pulley). The Chemical Level of Organization, Chapter 3. Similar to the erector spinae muscles, the semispinalis muscles in this group are named for the areas of the body with which they are associated. SITS; TISS; Mnemonic. [3] Origin and Insertion Reading time: about 1 hour. The same fracture that is palmarflexed is referred to as a Smith's fracture making the hand appear as it is coming inward and downward. 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 median nerve, which passes between its two heads to enter the forearm. Pectoralis major muscle :This is a superficial, large, fan shaped muscle that makes up the bulk of the pectoral (chest) region. It inserts onto the radial aspect of the 1st metacarpal. Its innervation is from the upper suprascapular nerve. Posterior dislocation can occur in epileptics or electric shocks. copyright 2003-2023 Study.com. The scapular region lies on the posterior surface of the thoracic wall. The Cardiovascular System: The Heart, Chapter 20. It causes extension of the IP joints, the MP joints, and wrist. Find it on your own body if you can. Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. The brevis muscle arises from the lateral epicondyle and inserts onto the dorsal base of the 3rd metacarpal. It is innervated by the C3 & C4 and the accessory nerve (cranial nerve 11 = CN11). It causes flexion of the interphalangeal joint (IP joint) of the thumb, as well as flexion at the metacarpophalangeal joint (MP joint). The third group, the spinalis group, comprises the spinalis capitis (head region), the spinalis cervicis (cervical region), and the spinalis thoracis (thoracic region). remember this mnemonic: Aortic hiatus=12 letters =T12 Esophageal =10 letters= T10 Vena cava = 8 letters = T8 There are major muscles that you need to know, so without delay, lets give it a go. The humeral head arises from the medial supracondylar ridge of the humerus and the coronoid process of the ulna. You walk Shorter to a street Corner. It commonly occurs following a fall onto an outstretched hand (FOSH). Supinator muscle:It is a small muscle that arises from the lateral epicondyle of the humerus, the supinator crest of the ulna, as well as the annular and radial collateral ligaments that support the radius against the ulna. One common style of the Monteggia fracture is in children where the radial head is dislocated through a forceful pulling on the arm. It is innervated by the anterior interosseous branch. 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 [?] This muscle song will help you learn the major muscles of the human body . and grab your free ultimate anatomy study guide! Try refreshing the page, or contact customer support. Copyright Its supinating effect are maximal when the elbow is extended. 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). 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 second way to describe a muscle's action is based on the joint, or the articulation. With more than 600 muscles in the body, it can feel impossible to keep track of them all. The intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones. The Nervous System and Nervous Tissue, Chapter 13. origin: cervical vertebrae 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. Reviewer: Bone Tissue and the Skeletal System, Chapter 12.
Courtney Marcus Obituary Ny, Articles M