Origin: a bony ellipse from the lateral third of the clavicle over the acromial process and along the spine of the scapula. It flexes the thumb at both the carpometacarpal joint and the metacarpophalangeal joint and is controlled by the median and the ulnar nerves. To flex the arm, the biceps contracts and the triceps relaxes; to extend the arm, the triceps contracts and the biceps relaxes. A muscle that supports a body segment so muscles attached to it can function. Insertion: skin of lower face. Tongue muscle. Spermatic cord muscle. Nerve: recurrent laryngeal and superior laryngeal of the vagus (CN X). Action: extends thigh, flexes and medially rotates leg. Action: flexes forearm, supinates hand. Insertion: skin of eyebrows, root of nose. Foot muscle. Origin: medial part of supraorbital margin. Action: flexes toes 2-5, plantarflexes foot. Nerve: deep peroneal (S1-S2). Nerve: ulnar (C8-T1. Middle ear muscle. The lateral or the medial pterygoid muscle. 15.5 Vision Vision. Shoulder muscle. Nerve: axillary (C4-C6). Insertion: upper part of greater trochanter of femur. Nerve: radial (C7-C8). Origin: crest and symphysis of pubis. Laryngeal muscle. Action: rotates arm laterally. The set of pelvic floor muscles, which include the iliococcygeus, levator prostatae or vaginal sphincter, pubococcygeus, and puborectalis muscles. Deepest layer: interspinalis, intertransverse, multifidus, rotatores, semispinalis, and spinalis capitis. Action: flexes leg, rotates leg laterally, extends thigh. Insertion: central tendon (of diaphragm). Origin: ventricular wall. One of the major muscles that stabilizes and controls the pressure inside the trunk; these are the pelvic floor, abdominal wall, back, and diaphragm muscles. Origin: ischial tuberosity, linea aspera and second supracondylar ridge of femur. Insertion: middle phalanges of fingers (digits 2-5). The chewing muscle, which is innervated by the mandibular division of the trigeminal nerve (CN V). Origin: adjacent facial muscles that surround mouth. Nerve: femoral (L2-L4). A muscle is composed of many fibres or muscle cells. A very small number of muscles in humans are tonic muscles. The muscles between the ribs, lying beneath the external intercostals. Origin: anterior tibia and fibula. Biomechanical analysis of local and global strengthening of gluteus medius, Bilateral Absence of Gemelli Muscles. A muscle arising on the inner surface of the thyroid cartilage. Action: flexes thigh. H.E. Arm muscle. Nerve: trigeminal (CN V). Action: inverts and plantarflexes foot. Pelvic muscle, part of levator ani. Insertion: medial side of cuneiform bone, base of metatarsal 1. Controlled movements involve two opposing muscles: the agonist muscle produces the main action, while the antagonist muscle produces the opposite action to a lesser degree. Origin: lateral side of proximal femur. Pectoralis major, pectoralis minor, serratus anterior, subclavius, subscapularis, or teres major muscle. A muscle of the hand originating on the flexor retinaculum and trapezium, trapezoid, and capitate and inserted on the lateral side of the base of the first phalanx of the thumb. It extends upward and backward and is inserted on the epiglottis. Skeletal muscle fibers that contract slowly and that cannot propagate an action potential along their cell membranes. Origin: lateral side of proximal tibia. I have poor immunity that I get sick very often. Nerve: obturator (L2-L3). Action: tenses and compresses abdomen, flexes and laterally rotates spine, lowers rib cage. Nerve: lower scapular (C6-C7). Nerve: inferior gluteal (L5-S2). The outer layer of muscles between the ribs, originating on the lower margin of each rib and inserted on the upper margin of the next rib. Action: flexes big toe, plantarflexes foot. Forearm muscle. Skeletal muscle got its name because it usually attaches at one end to bone. Shoulder muscle. Origins: arytenoid cartilage. Insertion: temporal edge of eyeball in front of its equator. Neck muscle. Insertion: proximal medial tibia. Origin: medial epicondyle of humerus, coronoid process of ulna. Any of several muscles arising from the ribs or vertebrae by separate slips. Cardiac muscle is innervated by both sympathetic and parasympathetic autonomic motor axons. Origin: upper edge of manubrium, middle of upper clavicle. Anterior: iliopsoas, quadriceps (rectus femoris, vastus intermedius, vastus lateralis, and vastus medius), and sartorius muscles. Nerve: spinal T7-T12. Neck and back muscle. Thigh muscle. Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Stem Cells Provide Greater Insight Into Rotator Cuff Disease, Non-pharmacological interventions to combat exercise-induced muscle damage, a little natural tax on work out. Nerve: long thoracic (C5-C7). A muscle of the hand originating on the flexor retinaculum and trapezium, trapezoid, and capitate and inserted on the lateral side of the base of the first phalanx of the thumb. Forearm, posterior: abductor pollicis longus, anconeus, brachioradialis, extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris, extensor digitorum, extensor digitorum minimi, extensor indicis, extensor pollicis brevis, extensor pollicis longus, and supinator muscles. Insertion: coracoid process of scapula. Insertion: xiphoid process, costal cartilages 5-7. Nerve: superior gluteal (L4-L5). Action: anchor leaflets of valves during heart contractions. Back muscle. Action: extends forearm. Deep layer: erector spinae and splenius. Insertion: upper medial tibia near tuberosity. Six muscles that attach outside the eyeball and that move the eye in its socket. Chest wall muscle. Nerve: oculomotor (CN III). Forearm muscle. Cardiac muscle is innervated by both sympathetic and parasympathetic autonomic motor axons. Forearm, posterior: abductor pollicis longus, anconeus, brachioradialis, extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris, extensor digitorum, extensor digitorum minimi, extensor indicis, extensor pollicis brevis, extensor pollicis longus, and supinator muscles. Origin: proximal three-fourths of ulna. Facial muscle. Internal eye muscle. 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My height is 5’5” and I weigh 176 lbs. Origin: posterior wall of middle ear. Thigh muscle. Origin: upper lateral edge of scapula. Action: turns eye up and outward with lateral rotation. The three-layered muscular wall of the urinary bladder. A muscle that encircles a duct, tube, or orifice, thus controlling its opening. Origin: anterior and lateral sides of proximal femur. Insertion: pisiform, hamate, and base of fifth metacarpal. The rectus femoris, vastus intermedius, vastus lateralis, and vastus medius muscles together. Nerve: upper and lower subscapular (C5-C7). Origin: capitate bone of wrist and metacarpals 2-3. Nerve: recurrent laryngeal of the vagus (CN X). Nerves: cervical spinal C4-C8. See: A tissue composed of muscle cells that contain loosely-organized actin and myosin filaments. Foot muscle. Origin: lower lateral edge of scapula. The balance between agonist and antagonist muscles allows precise control of the final action. Twitch skeletal muscle cells containing myoglobin and many mitochondria. Nerve: trigeminal (CN V). Posterior: flexor digitorum longus, flexor hallucis longus, gastrocnemius, plantaris, popliteus, soleus, and tibialis posterior muscles. Insertion: upper edge of eyeball in front of its equator. Almost all skeletal muscle in humans is twitch muscle. Action: flexes distal finger joints, aids in wrist flexion. Action: turns eye down and outward with medial rotation. Insertion: palmar surface of flexor retinaculum, palmar aponeurosis. Insertion: lateral side of middle of radius. Action: allows lens to become more curved to focus on near objects. A sheet of muscle extending up from the hyoid bone to the ipsilateral base and sides of the tongue. Shoulder muscle. Origin: epicranial (scalp) aponeurosis. Origin: lateral pterygoid plate. Origin: completely surrounds eye, attaches to medial palpebral ligament (and adjacent bones) and lacrimal crest (and adjacent bones). Action: anchor leaflets of valves during heart contractions. Origin: tendinous ring around optic nerve at rear of orbit. Action: pulls scapula forward (anterior) and laterally (abduction), rotates scapula upward. Insertion: lateral base of proximal phalanx of thumb. Origin: ischial tuberosity. This terminology has been officially adopted in the International Classification of Headache Disorders and is used in this chapter. Nerve: tibial (S2-S3). A muscle not under conscious control: smooth, cardiac, and some skeletal muscles. I am a 30 year old woman and am pregnant. The supply of ATP comes from MITOCHONDRIA between the fibrils. Insertion: iliotibial tract of fascia lata. Action: closes mouth, clenches teeth, retracts jaw. Anterior and lateral: digastric, geniohyoid, mylohyoid, omohyoid, platysma, sternocleidomastoid, sternohyoid, sternothyroid, stylohyoid, and thyrohyoid muscles. Action: tenses tympanic membrane, dampens excessive vibrations. Action: inverts and plantarflexes foot. Action: compresses check against teeth, retracts angle of mouth. Auditory Verbal Learning Test Version A - List B, Word 10. The anterior, the middle, or the posterior scalene muscle -- neck muscles. Laryngeal muscle. A skeletal muscle that moves or stabilizes the head or the trunk. The Greek shield had a notch cut into it for the chin, and the resemblance of the shield to a particular piece of cartilage in the neck brought about the term "thyreoid cartilage" (the "e" was later dropped). Origin: lateral condyle of tibia, upper three-fourths of fibula. Action: pulls eyebrows toward midline and downward. Origin: inner roof of orbit. Origin: lower costal margin. Middle layer: levator scapulae, rhomboid major, and rhomboid minor muscles. Insertion: medial side of proximal tibia. Origin: flexor retinaculum of wrist, scaphoid and trapezium bones. Foot muscle. Muscles are responsible for locomotion and play an important part in performing vital body functions. The tensor tympani and stapedius muscles. Origin: flexor retinaculum of wrist, scaphoid and trapezium bones. Scalp: frontalis and occipitalis muscles. Thigh muscle. Origins: arytenoid cartilage. Shoulder muscle. Action: closes mouth, protrudes mouth, moves jaw sideways. Action: flexes thumb. Origin: lateral condyle of tibia, upper three-fourths of fibula. Nerve: median (C7-C8). Forearm muscle. One of the mastication muscles. Nerve: suprascapular (C4-C6). Origin: occipital bone (superior nuchal line), nuchal ligament, spinous processes of vertebrae C7-T12. Origin: cricoid cartilage. A muscle that on contraction draws a part away from the median plane of the body or the axial line of an extremity. Nerve: ulnar (C8-T1). Forearm muscle. Chest wall muscle. Nerve: anterior belly -- trigeminal (CN V), posterior belly -- facial (CN VII). Nerve: abducens (CN VI). Insertion: posterior side of greater tubercle of humerus. Nerve: femoral (L2-L4). Insertion: posterior edge of lateral clavicle, acromion, posterior edge of spine of scapula. Origin: coronoid process of ulna, anterior surface of radius. Action: contralaterally rotates head. Where very strong contraction takes place the H-zone disappears and the thin filaments overlap. Origin: anterior and lateral sides of proximal femur. Plantar: abductor digiti minimi, abductor hallucis, adductor hallucis, flexor digitorum brevis, flexor digiti minimi brevis, flexor hallucis brevis, lumbrical, plantar interosseous, and quadratus plantae muscles. Hand muscle. It extends the forearm and abducts the elbow as the forearm pronates. Action: flexes thigh and leg, laterally rotates thigh. A muscle whose fibers converge on only one side of a tendon. Facial muscle. Action: elevates hyoid and larynx, lowers jaw. Cricothyroid, genioglossus, geniohyoid, hyoglossus, palatoglossus, pharyngeal constrictor, styloglossus, stylopharyngeus, salpingopharyngeus, and thyrohyoid muscles. Origin: medial supraspinous fossa of scapula. Nerve: axillary (C5-C6). Tonic muscles are uncommon in humans and are found only in the extraocular muscles, stapedius muscle, and intrafusal fibers of the muscle spindles. Neck: platysma. Insertion: extensor tendons of toes. Actions: extends (bends backward) the vertebral column and neck, twists the back. Nerve: tibial (L4-L5). Actions: raises ribs 1-2, bends neck ipsilaterally. Eyelid muscle. Thigh muscle. Nerve: ulnar (C8-T1. Nerves: cervical spinal C4-C8. A tissue composed of mitochondrion-filled muscle cells that also contain neatly packed actin and myosin filaments; the filaments are arranged in cylindrical bundles called myofibrils. It depresses the sides of the tongue and is innervated by cranial nerve XII (hypoglossal nerve). Origin: occipital bone (superior nuchal line), nuchal ligament, spinous processes of vertebrae C7-T12. A muscle that constricts the pharynx; it is important for swallowing. Light weights for longer, leaner muscles? Cardiac muscle, which is found only in the heart, cannot be controlled consciously. Nerve: tibial (L4-L5). Anterior and lateral: extensor digitorum longus, extensor hallucis longus, peroneus, peroneus longus, peroneus tertius, and tibialis anterior muscles. Nerve: median (C8-T1). Nerve: lumbar L1-L3. Nerve: median (C6-C7). It acts to draw the eyebrows down. Deep layer: erector spinae and splenius. It flexes the thumb at both the carpometacarpal joint and the metacarpophalangeal joint and is controlled by the median and the ulnar nerves. A muscle of the medial thigh originating on the ramus of the pubis and inserted in the linea aspera of the femur. A muscle that on contraction draws a part away from the median plane of the body or the axial line of an extremity. Origin: proximal three-fourths of ulna. Nerve: trigeminal (CN V). Insertion: distal phalanges of toes 2-5. Six muscles that attach outside the eyeball and that move the eye in its socket. Nerve: radial (C6-C8). Action: abducts arm. Middle ear muscle. Cardiac muscle, which is found only in the heart, cannot be controlled consciously. Origin: posterior wall of middle ear. Action: changes tension of vocal cords. Action: protrudes and depresses tongue. Origin: medial epicondyle of humerus, medial side of olecranon, proximal posterior edge of ulna. The smooth muscle fibers around the origin of the urethra. Any of the muscles used in breathing, including the diaphragm, the muscles of the rib cage, and the abdominal muscles. Origin: outer surface of ribs 1-8. Action: plantarflexes foot, flexes knee. Anterior: iliopsoas, quadriceps (rectus femoris, vastus intermedius, vastus lateralis, and vastus medius), and sartorius muscles. Any of the muscles used in breathing, including the diaphragm, the muscles of the rib cage, and the abdominal muscles. Origin: medial supraspinous fossa of scapula. Insertion: tuberosity of radius, posterior border of ulna (via bicipital aponeurosis). The iliacus and psoas major muscles considered together. Three adjacent vertical bands of deep back muscles -- the iliocostalis, longissimus, and spinalis muscles. muscle [mus´'l] a bundle of long slender cells (muscle fibers) that have the power to contract and hence to produce movement. Insertion: lesser trochanter of femur. Insertion: coronoid process of ulna. Action: turns eye up and outward with lateral rotation. Nerve: intercostals 8-12, iliohypogastric, ilioinguinal (L1). Nerve: ulnar (C7-C8). Nerve: facial (CN VII). 54 Likes, 13 Comments - Residents (@lapmrresidency) on Instagram: “Resident’s Corner: Name: David Huy Blumeyer, MD Year in residency: PGY-4 Where were you born…” Nerve: superior laryngeal of the vagus (CN X). Insertion: neck of stapes. 225. Insertion: lesser trochanter of femur, psoas major tendon. Thigh muscle. Action: extends thigh, flexes and medially rotates leg. Actions: extends (bends backward) the vertebral column and neck, twists the back. Posterior: flexor digitorum longus, flexor hallucis longus, gastrocnemius, plantaris, popliteus, soleus, and tibialis posterior muscles. Insertion: olecranon process. Nerve, hand: median (C8-T1), ulnar (C8-T1). Action: abducts thumb, aides in opposition with digit 5. A muscle that can be controlled voluntarily; most skeletal muscles are voluntary. Insertion: plantar side of distal phalanx of big toe. The lateral or the posterior cricoarytenoid -- laryngeal muscles. Origin: lateral epicondyle of humerus, proximal edge of ulna. Insertions: contralateral arytenoid cartilage. Insertion: linea aspera of femur. Thigh muscle. Origin: inguinal ligament and pubic tubercle. Insertion: lateral side of middle of radius. Nerve: trigeminal (CN V). Smooth muscle tissue tends to occur as sheets and is typically found in the walls of tubes, e.g., arteries, and sacs, e.g., the gastrointestinal system. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Origin: coronoid process of ulna, anterior surface of radius. The chewing muscle, which is innervated by the mandibular division of the trigeminal nerve (CN V). The major nose muscle and a muscle of facial expression. Chest wall muscle. Nerve: sciatic (L5-S2). Origin: lower half of pubis. Nerve: obturator (L2-L3). Spermatic cord muscle. Insertion: lateral surface of eyeball behind its equator. Origin: lateral two-thirds of fibula. Action: flexes thumb. Nerve: median (C6-C7). Origin: iliac crest, anterior superior iliac spine. Insertion: pisiform, hamate, and base of fifth metacarpal. Medial: adductor brevis, adductor longus, adductor magnus, gracilis, and pectineus muscles. The vagus nerve, historically cited as the pneumogastric nerve, is the tenth cranial nerve or CN X, and interfaces with the parasympathetic control of the heart, lungs, and digestive tract.The vagus nerves are normally referred to in the singular. I do exercise twice a day. Insertion: into itself and skin of lips while encircling mouth. Nerve: femoral (L2-L4). Either of the two muscles on each side of the pelvic region that rotate the thighs outward. A flat muscle with a broad origin and narrow insertion. In each cell, the myofibrils are all aligned in the same direction and are parceled into longitudinal blocks (called sarcomeres) of similar lengths. One of the major muscles that stabilizes and controls the pressure inside the trunk; these are the pelvic floor, abdominal wall, back, and diaphragm muscles. Insertion: bicipital groove of humerus. Origin: Anterior medial surface of ribs 3-5. Eye: orbicularis oculi. Abdominal wall muscle. Origin: incisive fossa at front of mandible. Either of the two muscles that attach to the medial surface of the greater trochanter of the femur (the trochanteric fossa) where they mesh with the tendon of the obturator internus muscle. Deltoid, infraspinatus, subscapularis, supraspinatus, teres major and teres minor muscles. Central facial palsy (colloquially referred to as central seven) is a symptom or finding characterized by paralysis or paresis of the lower half of one side of the face.It usually results from damage to upper motor neurons of the facial nerve.. Origin: lower half of ilium. Lateral rectus muscle, one of the extraocular muscles. These filaments overlap as shown in Fig. Origin: lateral supracondylar ridge of distal humerus. A ridge of myocardium on the inner wall of either atrium of the heart. Origin: pisiform bone of wrist. Insertion: neck of stapes. Insertion: vertebral edge of scapula. Insertion: lower edges of thyroid cartilage. Nerve: median (C8-T1). Insertion: skin of eyebrows, root of nose. Action: adducts hand, extends wrist. In STRIATED MUSCLE, each cell contains a bundle of MYOFIBRILS each exhibiting a banding pattern and being made up of a number of SARCOMERES arranged end to end. Insertion: bases of second and third metacarpals. It extends upward and backward and is inserted on the epiglottis. Leg muscle. Abductor digiti minimi, abductor pollicis brevis, adductor pollicis, dorsal interosseous, flexor digiti minimi, flexor pollicis brevis, lumbrical, opponens digiti minimi, opponens pollicis, palmaris brevis, and palmar interosseous muscles. Insertion: proximal end of fifth metacarpal. See: illustration. Facial muscle. It extends the forearm and abducts the elbow as the forearm pronates. Three adjacent vertical bands of deep back muscles -- the iliocostalis, longissimus, and spinalis muscles. Posterior: levator scapulae, scalene muscles, and trapezius. The rectus femoris, vastus intermedius, vastus lateralis, and vastus medius muscles together. Origin: pterygomandibular raphe and alveolar processes of jaws. It provides horizontal eye movement control. Action: rotates arytenoid cartilages for vocalizations. Nerve: lateral and medial pectoral (C6-C8). Nerve: radial (C7-C8). Origin: tendinous ring around optic nerve at rear of orbit. When activated by an internal release of calcium, the filaments use the energy in ATP to crawl along each other in opposite directions. The three-layered muscular wall of the urinary bladder. The remainder of human skeletal muscle contains only twitch fibers. Origin: genial tubercle on inside of mandibular symphysis. Posterior thigh muscles that originate on the ischial tuberosity and act across both the hip and knee joints; they are the biceps femoris, gracilis, sartorius, semitendinosus, and semimembranosus muscles. Action: turns eye down and medially. In each cell, the myofibrils are all aligned in the same direction and are parceled into longitudinal blocks (called sarcomeres) of similar lengths. Action: inflates lungs. The three general classes of muscle cells (myocytes) are skeletal (striated), cardiac (striated), and smooth; most of the muscle in humans is skeletal. Nerve: primarily parasympathetic (S2-S4), secondarily sympathetic (T11-L2). Muscle of mastication. It really hurts! Shoulder muscle. Nerve: femoral (L2-L4). Origin: cricoid cartilage. Action: raises upper eyelid. Action: flexes forearm, supinates hand. Origin: ischial tuberosity. Nerve: tibial (S2-S3). Insertion: ciliary process of lens. It adducts, flexes, and medially rotates the thigh and is controlled by the obturator nerve. Action: flexes fingers and wrist. Origin: greater wing of sphenoid bone, lateral pterygoid plate. Origin: medial subscapular fossa. Origin: lower half of pubis. Action: flexes hand. Insertions: upper surfaces of ribs 1-2. What can I do to build muscle and develop immunity? Hand muscle. Nerve: accessory (CN XI), spinal C3-C4. Origins: transverse processes of vertebrae C1-C7. Origin: completely surrounds eye, attaches to medial palpebral ligament (and adjacent bones) and lacrimal crest (and adjacent bones). Extraocular muscle. Origin: proximal ends of tibia and fibula. Action: elevates eyebrows, wrinkles forehead. Forearm muscle. https://medical-dictionary.thefreedictionary.com/EOM. Origin: anterior belly attaches to the digastric fossa in mandible at base of anterior midline, posterior belly attaches to mastoid process. Origins: nuchal ligament, spinous processes of vertebrae C7-T5. Thigh muscle. Insertions: contralateral arytenoid cartilage. Muscle derived from mesodermal somites, including most skeletal muscle. Insertion: linea aspera and adductor tubercle of femur. Nerve: ulnar (C7-C8). Arm: biceps brachii, brachialis, coracobrachialis, and triceps muscles. Action: adducts, flexes, and medially rotates thigh. Insertion: proximal medial tibia. Nerve: facial (CN VII) Action: closes eyelids, lifts cheeks, compresses lacrimal sac. Nerve: thoracodorsal (C6-C8). Posterior: levator scapulae, scalene muscles, and trapezius. Insertion: deltoid tuberosity on the lateral shaft of the humerus. Muscle of mastication. Origin: anterior surface of sacrum. ab-duk´shun: aberration: A deviation from a normal condition or behavior. Insertion: lateral base of proximal phalanx of thumb. Extraocular muscle. Action: adducts and medially rotates arm. Action: supports pelvis, holds anal canal at right angle to rectum. Nerve: trigeminal (CN V). Insertion: upper medial tibia near tuberosity. Arm muscle. Nerve: obturator (L2-L3). In the muscle tissue, the cardiac muscle cells are connected in branching networks. It adducts, flexes, and medially rotates the thigh and is controlled by the obturator nerve. Insertion: proximal phalanx of thumb and medial sesamoid bone. Muscle of mastication. Action: rotates arm laterally. Neck and facial muscle. Insertion: tricuspid and mitral valve leaflets via chordae tendinae. Insertion: lateral edge of bicipital groove of humerus. Nerve: ulnar (C8-T1). Action: stabilizes (abducts) thigh, extends and laterally rotates leg. The facial motor nucleus has dorsal and ventral divisions that contain lower motor neurons supplying the muscles of the upper and lower face, respectively. Nerve: facial (CN VII). Action: extends fingers and wrist. A muscle whose fibers converge on only one side of a tendon. It depresses the sides of the tongue and is innervated by cranial nerve XII (hypoglossal nerve). Pectoralis major, pectoralis minor, serratus anterior, subclavius, subscapularis, or teres major muscle. Insertion: base of proximal phalanx of big toe. Origin: spinous processes of vertebrae T7-S3, thoracolumbar fascia, iliac crest. Nerve: primarily parasympathetic (S2-S4), secondarily sympathetic (T11-L2). Action: elevates, retracts, and rotates scapula. Nerve: oculomotor (CN III). A muscle arising on the inner surface of the thyroid cartilage. Origins: a wide tendon running along the iliac crest to the sacrum, the lower lumbar and sacral spinous processes. In clinical practice, referred to as the lateral rectus muscle. In clinical practice, referred to as the lateral rectus muscle. Forearm muscle. After the dissection of Albert Einstein's brain, there were claims that it was missing the parietal opercula bilaterally allowing his inferior parietal lobe to grow 15% wider than normal. Twitch muscles cells can be categorized into a number of types on the basis of the biochemical cycle that they use to produce their energy: red (oxidative), white (glycolytic), or intermediate (oxidative/glycolytic). the heart muscle; the muscles of the arm. Action: extends leg. It is innervated by the radial nerve (C7, C8, T1). A tissue composed of muscle cells (often multinucleated) that contain neatly packed actin and myosin filaments; these filaments are arranged in cylindrical bundles called myofibrils. Origin: anterior surface of sacrum. Nerve: intercostals 8-12, iliohypogastric, ilioinguinal (L1). Action: tenses abdomen, flexes vertebral column. Action: adducts hand, extends wrist. Origin: ischial tuberosity. Origin: outer surface of ribs 1-8. Origin: sphenoid bone deep in medial side of orbit. Insertion: common tendon of quadratus muscles, tibial tuberosity via patellar ligament. Insertion: pterygoid fovea of condyle of mandible. Front half of occipitofrontalis muscle – a facial muscle. Origin: middle of fibula. Nerve: obturator (L2-L4). Action: extends thigh, flexes and medially rotates leg. It acts to draw the eyebrows down. Action: dorsiflexes big toe. Forearm muscle. Insertion: anterior half of iliac crest, rectus sheath, inguinal ligament. Origin: medial part of supraorbital margin. Action: raises upper eyelid. Nerve: facial (CN VII). Nerves: dorsal rami of the spinal nerves. Nerve: deep peroneal (S1-S2). Neck muscle with two bellies. Insertion: xiphoid process, costal cartilages 5-7. Insertion: lesser trochanter of femur. Origin: adjacent facial muscles that surround mouth. Nerve: radial (C7-C8). Foot muscle. The anterior, the middle, or the posterior scalene muscle -- neck muscles. I keep on getting a muscle cramps on the back on my lower leg. Insertions: perineal body, coccyx, anococcygeal ligament, lower sacrum. Superficial: latissimus dorsi and trapezius muscles. Origin: anterior superior iliac spine. Insertion: tricuspid and mitral valve leaflets via chordae tendinae. Origin: sphenoid bone deep in medial side of orbit. Nerve: recurrent laryngeal of vagus (CN X). Thigh muscle. A muscle with several tendons of origin and several tendons of insertion, in which fibers pass obliquely from a tendon of origin to a tendon of insertion on each side. The superior gemellus muscle arises from the ischial spine and is innervated by the nerve to the obturator internus; the inferior arises from the ischial tuberosity and is innervated by the femoral nerve.