muscle mnemonics origin, insertion action muscle mnemonics origin, insertion action

The triceps brachii becomes the agonist - while the biceps brachii is the antagonist - when we extend our forearm. Additionally, these muscles switch roles with opposite movements. action: protraction of scapula, muscle that allows you to shrug your shoulders or extend your head This article will discuss the anatomy of the serratus anterior muscle. Here's a mnemonic to help you remember the innervation of the lumbricals more easily! The intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones. Place your fingers on both sides of the neck and turn your head to the left and to the right. The muscles of facial expression originate from the surface of the skull or the fascia (connective tissue) of the face. Iliacus muscle. It has numerous muscles and has a complex range of movements. The posterior muscles of the neck are primarily concerned with head movements, like extension. 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 supinating effect are maximal when the elbow is flexed. flashcard sets. The opponens digiti minimi arises from the hook of hamate and flexor retinaculum. All other trademarks and copyrights are the property of their respective owners. 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. The origin is typically the tissues' proximal attachment, the one closest to the torso. Grounded on academic literature and research, validated by experts, and trusted by more than 2 million users. Origin: For example, one could say the wrist is distal to the elbow. It is innervated by the deep branch of the radial nerve. This necrosis lead to a flattened thenar eminence (thumb mound palmar surface). Extensor digitorum muscle:This muscle lies in the extensor compartment and arises from the lateral epicondyle. Action: Extends thigh, flexes leg, Wider than semmitendonosis For example, the biceps brachii performs flexion of the forearm as the forearm is moved. The distal phalanx therefore lies in permanent flexion, and has the appearance of a mallet. In addition, both muscles working together are the flexors of the head. They work on the hyoid bone, with the suprahyoid muscles pulling up and the infrahyoid muscles pulling down. In this article we will discuss the gross (structure) and functional anatomy (movement) of the muscles of the upper limb. By looking at all of the upper limbs components separately we can appreciate and compartmentalize the information, then later view the upper limb as a whole and understand how all of its parts work in unison. origin: in strips on the lateral and anterior surface of ribs Bony Landmarks Types & Identification | What are Femur Landmarks? This eBook contains high-quality illustrations and validated information about each muscle. 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). Pronator teres muscle is the larger of the pronator muscles and has two heads. The upper fibers act to extend the neck, elevate, and upwardly rotate. For example, the brachialis is a synergist of the biceps brachii during forearm flexion. origin: cervical vertebrae The insertion then, is the attachment of a muscle on the more moveable bone. Last reviewed: July 22, 2022 Phew. My insertion is transverse processes C1-C4, mastoid process, and occipital bone. This results in a restricted range of motion. They arise from the metacarpal bones and insert into the extensor hoods of each finger. Conversely, you can say the elbow is proximal to the wrist. The long head arises from the infraglenoid tubercle and consists of mainly type 2b fibers. 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. Tearing most commonly occurs in the tendon of supraspinatus. The Lymphatic and Immune System, Chapter 26. Click the card to flip . The scalene muscles include the anterior scalene muscle (anterior to the middle scalene), the middle scalene muscle (the longest, intermediate between the anterior and posterior scalenes), and the posterior scalene muscle (the smallest, posterior to the middle scalene). Action: external rotator of the thigh Tongue muscles are both extrinsic and intrinsic. Muscles of the Posterior Neck and the Back. A synergist is a muscle that enhances the action of the agonist. Finally, the scalenes include the anterior scalene, middle scalene, and posterior scalene. Separate the muscles into compartments (already done for the leg muscles). Triceps brachii muscle:This is the only muscle of the posterior compartment of the arm. This muscle song will help you learn the major muscles of the human body. Latissimus dorsi muscle :This is a large, fan shaped superficial muscle which has a large area of origin. Teres minor:This muscle arises from the lateral border of the scapula and inserts onto the greater tubercle of the humerus. 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. The insertion is usually distal,. Copyright 2023 RegisteredNurseRN.com. However, the scapula is integral to the movement of the shoulder via the rotator cuffand additional muscles. The lower subscapular nerve innervates the muscle and it is a branch of the posterior cord of the brachial plexus. Test your knowledge on the muscles of the arm right away using our handy round-up of quizzes, diagrams and free worksheets. Extrinsic tongue muscles insert into the tongue from outside origins, and the intrinsic tongue muscles insert into the tongue from origins within it. It runs down the posterior compartment of the forearm and inserts into the middle and distal phalanges of the 2nd to 5th digits. The good news? Muscles are either axial muscles or appendicular. 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. The splenius muscles originate at the midline and run laterally and superiorly to their insertions. 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). 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. Origin: Clavicle, acromion process, spine of scapula Insertion: Deltoid tuberosity of the humerus Action: Abducts arm; flexes, extends, medially, and laterally rotates arm. Our muscle anatomy charts make it easier by listing them clearly and concisely. 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. Subjects: action comments insertion muscles nerve origin skeletal . The origin is the fixed attachment, while the insertion moves with contraction. It acts as an adductor (to add to the body), assists in extension and medial rotation, as well as stabilization of the scapula. The Cardiovascular System: Blood, Chapter 19. Mnemonics to remember bones Antagonist contractions are opposite that of the agonist and serve to control the action. Thenar eminence:It consists of three muscle: flexor pollicis brevis, abductor pollicis brevis, and the opponens pollicis. The extrinsic muscles all include the word root glossus (glossus = tongue), and the muscle names are derived from where the muscle originates. This is a fracture of the distal third of the radial shaft with dislocation of the distal radioulnar joint. The nerve supply comes from the upper and lower subscapular. For example, upper limb muscles are grouped by shoulder and arm, forearm and hand. It most commonly dislocates anteriorly (95%), and can damage the axillary nerve. Muscle Mnemonics. With these movements, you can feel the action of the corrugator supercilli. The segmental muscles include the interspinales and intertransversarii. You can listen to the song below, and then take the free major muscle quiz. During that particular movement, individual muscles will play different roles depending on their origin and insertion. An error occurred trying to load this video. The latissimus dorsi is a large back muscle responsible for the bulk of adduction of the arm (pulling the arm to the sides of . The hand serves as the origin and/or insertion for a vast number of muscles. The rotator cuff is formed by four muscles, supraspinatus, infraspinatus, teres minor, and subscapularis. A: abductor pollicis brevis. Rather, antagonist contraction controls the movement by slowing it down and making it smooth. This muscle also prevents the humeral head from moving too far upwards while the deltoidis in action, as do all the rotator cuff muscles. Simplify your retention of the thenar muscles by learning the following mnemonic! Its action is elevation of the scapula as well as superior rotation of the scapula. The muscles of the back and neck that move the vertebral column are complex, overlapping, and can be divided into five groups. TABLE: Origin, Insertion, and Action for Lecture Checklist: Selected Human Muscles. 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. It helped me pass my exam and the test questions are very similar to the practice quizzes on Study.com. You will feel the movement originate there. One common style of the Monteggia fracture is in children where the radial head is dislocated through a forceful pulling on the arm. The anterior muscles - such as the quadriceps femoris, iliopsoas, and sartorius, work as a group to flex the thigh at the hip and extend the leg at the knee. Subscapularis muscle:This is another muscle of the rotator cuff, which is deep and arises from the large anterior subscapular fossa. #shorts #anatomy. Let's take a look at forearm flexion and identify the roles of the different muscles involved. To easily remember the three origins of the deltoid, use the mnemonic provided below. 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Copyright 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. 2. The transversospinales include the semispinalis capitis, semispinalis cervicis, semispinalis thoracis, multifidus, and rotatores. lessons in math, English, science, history, and more. It inserts on the distal phalangesof the 2nd to 5th digits and acts to flex the distal IP joints of the fingers. Muscle origins and insertions Many muscles are attached to bones at either end via tendons. The muscle then descends inferiorly to insert into the radial tuberosity of the radius as well as help create the bicipital aponeurosis, an expansion that inserts into the deep fascia of the forearm and onto the ulna. Author: [3] Origin and Insertion This is logical because this muscle inserts broadly at an angle across much of the back of the head, so it attaches to both lateral structures (the mastoid processes) and medial structures (the occipital bone). : imagine holding a suitcase or briefcase at your side. It is innervated by the posterior interosseous branch. Explain the difference between axial and appendicular muscles. As these attachments of the brachialis are similar in nature to those of the biceps brachii, so is its action. Bone Tissue and the Skeletal System, Chapter 12. It is innervated by the posterior interosseous branch. O: opponens pollicis. It can be observed when a patient circumducts (circle movement) the affected upper limb. It inserts onto the medial border of the scapula just superior to the rhomboid major. Flexor carpi muscles: In the superficial layer of the forearm is where we find flexor carpi radialis, and flexor carpi ulnaris. You can feel the temporalis move by putting your fingers to your temple as you chew. Pectoralis major muscle :This is a superficial, large, fan shaped muscle that makes up the bulk of the pectoral (chest) region. iliacus - origin: ilium fossa This compartment is anterior in anatomical position. Read more. Explore the definition and actions of origin and insertion and learn about action nomenclature and the functional roles of muscles. Because of its mobility, the tongue facilitates complex speech patterns and sounds. Curated learning paths created by our anatomy experts, 1000s of high quality anatomy illustrations and articles. This muscle allows you to whistle, blow, and suck; and it contributes to the action of chewing. I feel like its a lifeline. In summary, skeletal muscles are attached to bones on each end by tendons. It is innervated by the musculocutaneous nerve. Use the following mnemonic to remember the origins of the biceps brachii muscle. You walk Shorter to a street Corner. 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. The spinalis group includes the spinalis capitis, the spinalis cervicis, and the spinalis thoracis. This complete MBLEx prep course covers all sections of the FSMTB Massage & Bodywork Licensing Exam, and includes full MBLEx practice tests and quizzes. All content published on Kenhub is reviewed by medical and anatomy experts. As the muscles pass anteriorly to the MP joints and insert they cause flexion of the MP joint and extension of the IP joints. Suprahyoid muscles are superior to it, and the infrahyoid muscles are located inferiorly. Semispinalis capitis: Origin: transverse processes of C7-T12. insertion: spinus process of scapula Do Humans Have an Open or Closed Circulatory System? 3 in extensor compartment of arm: 3 heads of triceps (long, medial, lateral), 3 thenar muscles: abductor pollicis brevis, flexor pollicis brevis, opponens pollicis (+adductor pollicis), 3 hypothenar muscles: abductor digiti minimi, flexor digiti minimi, opponens digiti minmi (+palmaris brevis), 3 metacarpal muscles: dorsal interossei, palmar interossei, lumbricals, 3 abductors of digits: dorsal interossei, abductor pollicis brevis, abductor digiti minimi, Flexor carpi radialis muscle (cross-sectional view) -National Library of Medicine, Superficial head of flexor pollicis brevis muscle (ventral view) -Yousun Koh, Lumbrical muscles of the hand (ventral view) -Yousun Koh. It is innervated by the musculocutaneous nerve, a branch of the lateral cord of the brachial plexus. 977 Cards -. 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). With more than 600 muscles in the body, it can feel impossible to keep track of them all. Flashcard Maker: sean bennet. Muscles of the Upper Limb Pectoralis minor ORIGIN: anterior surface of ribs 3 - 5 ACTION INSERTION: coracoid process (scapula) Muscles Stabilizing Pectoral Girdle INNERVATION: pectoral nerves: protracts / depresses scapula (Anterior view) Serratus anterior ORIGIN: ribs 1 - 8 INSERTION: ACTION medial border of scapula stabilizes / depresses You ride Longer on a Superhighway. Insertion: Crest of lesser tubercle of humerus Action: Extends, adducts, and medially rotates arm (spirals underarm to front . Do you want an efficient way to remember the arm muscles? The extrinsic muscles of the hand originate outside the hand, commonly the forearm, and insert into hand structures. inserion: medial border of scapula The first describes action in terms of the bone to which the muscle is attached or the appendage that is moved. Insertion: greater trochanter on the back of the femur The damaged nerve causes a weakened serratus anterior, leading to the scapula not being pulled down and in during circumduction. I would honestly say that Kenhub cut my study time in half. | 15 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 head is balanced, moved and rotated by the neck muscles (Table 11.5). Why are the muscles of the face different from typical skeletal muscle? 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 serratus anterior muscle originates from the 1st to 8th or 9th rib s and inserts at the anterior surface of the scapula. It acts to extend the pinky as well as the wrist. The insertion is usually distal, or further away, while the origin is proximal, or closer to the body, relative to the insertion. Agonists, or prime movers, are responsible for the bulk of the action. 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. 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. 1. 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 is also capable of weakly supinating and pronating the forearm. Definition. It arises from the lateral epicondylar ridge and inserts onto the radial styloid process. action: elevates scapula, The posterior hamstring muscle group - 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. Its innervation is from the upper suprascapular nerve. In our cheat sheets, youll find the origin(s) and insertion(s) of every muscle. 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. It is also innervated by the median nerve. Next to each muscle, youll find its origin(s), insertion(s), innervation(s) and function(s). The sternocostal head arises from the sternum and the superior 6-7 costal cartilages. 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. For origins and insertions, I learned the exceptions in each compartment/the ones that stick out. Here I discuss an alternative way to learn muscles and their origin(s), insertion(s), and action(s).Key Takeaways. Print Muscle Origin and Insertion: Definition and Actions Worksheet 1. The muscle arises mainly from the flexor retinaculum and tubercle of the trapezium and inserts onto the proximal phalanx or metacarpal of the thumb. It also acts as an extensor of the wrist and radial deviator. If the place is a bone that remains immobile for an action, the attachment is called an origin. Conventionally, a muscle origin describes the attachment of a muscle on the more stable bone. 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 [?] Both these muscles are known as the punching muscles as they contribute to radial deviation of the wrist, which is essential for boxers. Coracobrachialis muscle :The beauty of this muscle is that its name explains its origin, insertion, and action. All rights reserved. If the place is on the bone that moves during the action, the attachment is called an insertion. 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. 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. 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. Thats why wecreated muscle anatomy charts; your condensed, no-nonsense, easy to understand learning solution. This is a bony deformity of the finger or toes associated with rheumatoid arthritis and trauma to the end of the extended finger. These final muscles make up your calf. The muscle origin often describes the more proximal attachment point of the muscle, while the muscle insertion point refers to the distal attachment. The muscle has dual innervation. It is innervated by the medial (C8-T1) and lateral (C5-C7) pectoral nerves. It is caused by proximal interphalangeal joint flexion, and distal interphalangeal joint extension. Fluid, Electrolyte, and Acid-Base Balance, Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Devon Quick & Jon Runyeon, Next: 11.5 Axial muscles of the abdominal wall and thorax, Creative Commons Attribution-ShareAlike 4.0 International License, Moves eyes up and toward nose; rotates eyes from 1 oclock to 3 oclock, Common tendinous ring (ring attaches to optic foramen), Moves eyes down and toward nose; rotates eyes from 6 oclock to 3 oclock, Moves eyes up and away from nose; rotates eyeball from 12 oclock to 9 oclock, Surface of eyeball between inferior rectus and lateral rectus, Moves eyes down and away from nose; rotates eyeball from 6 oclock to 9 oclock, Suface of eyeball between superior rectus and lateral rectus, Maxilla arch; zygomatic arch (for masseter), Closes mouth; pulls lower jaw in under upper jaw, Superior (elevates); posterior (retracts), Opens mouth; pushes lower jaw out under upper jaw; moves lower jaw side-to-side, Inferior (depresses); posterior (protracts); lateral (abducts); medial (adducts), Closes mouth; pushes lower jaw out under upper jaw; moves lower jaw side-to-side, Superior (elevates); posterior (protracts); lateral (abducts); medial (adducts), Draws tongue to one side; depresses midline of tongue or protrudes tongue, Elevates root of tongue; closes oral cavity from pharynx. 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). origin: anterior sacrum It inserts onto the ulnar aspect of the 5th proximal phalanx. The problem? Our opposable thumb is essential to our advancement as a species. Groups of muscles are involved in most movements and names are used to describe the role of each muscle involved. It divides and allows the tendon of flexor digitorum profundus to pass through at Campers chiasm (tendon split). The brachialis originates on the humerus, and it inserts on the front of the ulna. The palatoglossus originates on the soft palate to elevate the back of the tongue, and the hyoglossus originates on the hyoid bone to move the tongue downward and flatten it. 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 is a fracture of the proximal third of the ulna with associated dislocation of the proximal radioulnar joint. Place your finger on your eyebrows at the point of the bridge of the nose. 2009. It consists mainly of type 2a fibers and provides power and endurance to elbow extension. In anatomical terminology, chewing is called mastication. Pectoralis minor inserts onto the coracoid process of the scapula. In addition, you might want to watch our anatomy and physiology lectures on YouTube, or check our anatomy and physiology notes. Mnemonics to recall the muscles of the rotator cuff are:. It also has a role in stabilizing the humerus and part of the rotator cuff of four muscles. This system reflects the bones of the skeleton system, which are also arranged in this manner. It is innervated by the C3 & C4 and the accessory nerve (cranial nerve 11 = CN11).