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muscles

        Help!  

muscle
origin
insertion
action
deltoid   lateral 1/3 of the clavicle, acromion, spine of the scapula   deltoid tuberosity   all: abduct the shoulder, anterior: flex, medially rotate, and horizontally abduct the shoulder, posterior: extend, laterally rotate, and horizontally adduct the shoulder  
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latissimus dorsi   spinous processes of the last 6 thoracic vertebrae, the last 3 to 4 ribs, thoracolumbar aponeurosis, and posterior iliac crest   crest of the lesser tubercle of the humerous   extend, adduct, and medialy rotate the shoulder  
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trapezius   medial portion of the superior nuchal line of the occiput, ligamentum nuchae, external occipital protuberance, and spinous processes of C7 to T12   lateral 1/3 of the clavicle, acromion, spine of the scapula   all bilat: extend head and neck, unilat: laterally flex head and neck to same side, rotate head and neck to opposite side, elevate and upwardly rotate scapula, middle: adduct and stabilize the scapula, lower: depress and upwardly rotate scapula  
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teres major   lateral side of the inferior angle, and the lower half of the lateral border of the scapula   crest of the lesser tubercle of the humerus   extend, adduct and medially rotate the shoulder  
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supraspinatus   supraspinous fossa of the scapula   greater tubercle of the humerus   abduct the shoulder, stabilize the head of the humerus in the glenoid cavity  
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infraspinatus   infraspinous fossa of the scapula   greater tubercle of the humerus   laterally rotate, adduct, extend, horizontally abduct the shoulder, stabilize the head of humerus in the glenoid cavity  
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teres minor   superior half of the lateral border of the scapula   greater tubercle of the humerus   laterally rotate, adduct, extend, and horizontally abduct the shoulder, stabilize the head of the humerus in the glenoid cavity  
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subscapularis   subscapular fossa of the scapula   lesser tubercle of the humerus   medialy rotate the shoulder, and stabilize the head of the humerus in te glenoid cavity  
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rhomboid major   spinous processes of T2 to T5   medial border of the scapula between the spine of the scapula and the inferior angle   adduct, elevate, and downwardly rotate the scapula  
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rhomboid minor   spinous processes of C7 to T1   upper portion of the medial border of the scapula, across the spine of the scapula   adduct, elevate, and downwardly rotate the scapula  
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levator scapula   transverse processes of the 1st through 4th cervicle vertabrae   uper region of the medial border, and the superior angle of the scapula   unilat: elevate, downwardly rotate the scapula, laterally flex the ehad and neck to the same side, bilat: extend the head and neck  
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serratus anterior   surfaces of the upper 8 to 9 ribs   anterior surfaces of the medial border of the scapula   origin fixed: abduct and depress the scapula, holds the medial border of the scapula against the rib cage, scapula fixed: may act in forced inhilation  
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pectoralis major   medial 1/2 of the clavicle, sternum, and the cartilage of the 1st through 6th ribs   crest of the greater tubercle of the humerus   all: adduct, medially rotate the shoulder, andassist in elevating the thorax in forced inhilation, upper: flex, horizontally adduct the shoulder, lower: extend the shoulder  
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pectoralis minor   ribs 3 to 5   coracoid process of the scapula   depress, abduct the scapula, tilt the scapula anteriorly, if fixed: assist in forced inhilation  
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subclavius   1st rib and the cartilage   inferior lateral aspect of the clavicle   draw clavicle inferiorly and anteriorly, elevate the 1st rib and stabilize the steroclavicular joint  
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biceps brachii   short head: coracoid process of the scapula, long head: supraglenoid tubercle of the scapula   tuberosity of the radius and the aponeurosis of the biceps brachii   flex the elbow, supinate the forearm, and flex the shoulder  
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triceps brachii   long head: infraglenoid tubercle of the scapula, lateral head: posterior surface of the proximal half of the humerus, medial head: posterior surface of the distal half of the humerus   olecrannon process of the ulna   all: extend the elbow, long head: extend and abduct the shoulder  
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coracobrachialis   coracoid process of the scapula   medial surface of the mid-humeral shaft   flex, and adduct the shoulder  
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brachialis   distal half of the anterior surface of the humerus   tuberosity and the coranoid process of the humerus   flex the elbow  
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brachioradialis   lateral supracondylar ridge of the humerus   styloid process of the radius   flex the elbow, assist to pronate and supinate the forearm when the movments are resisted  
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extensor carpi radialis longus   lateral supracondylar ridge of the humerus   base of the second metacarpal   extend the wrist, abduct the wrist and assist to flex the elbow joint  
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extensor carpi radialis brevis   lateral supracondylar ridge of the humerus   base of the 3rd metacarpal   extend the wrist, abduct the wrist, assist to flex the elbow  
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extensor carpi ulnaris   common extensor tendon from the lateral epicondyle of the humerus   base of the 5th metacarpal   extend the wrist, adduct the wrist  
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extensor digitorum   common extensor tendon from the lateral epicondyle of the humerus   middle and distal phalanges of the 2nd through 5th fingers   extend the 2nd through 5th fingers, assist to extend the wrist  
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flexor carpi radialis   common flexor tendon from the medial epicondyle of the humerus   bases of the 2nd and 3rd metacarpals   flex the wrist joint, abduct the wrist joint, and flex the elbow  
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palmaris longus   commone flexor tendon from the medial epicondyle   flexor retinaculum and palmaris aponeurosis   tense the palmar fascia, flex the wrist joint, and flest the elbow joint  
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flexor carpi ulnaris   humeral head: common flexor tendon fron the medial epicondyle of the humerus, ular head: posterior surface of the proximal half of the ulnar shaft   pisiform   flex the wrist, adduct the wrist, and assist to flex the elbow  
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flexor digitorum superficialis   common flexor tendon from the medial epicondyle of the humerus, ulnar collateral ligament, coronoid process of the ulna, and the shaft of the radius   by four tendons into the sides of the middle phalanges of the 2nd through 5th fingers   flex the 2nd through 5th fingers, flex the wrist  
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flexor digitorum profundus   the anterior and the edial surfaces of the proximal 3/4 of the ulna   by four tendons into the bases of the distal phalanges, palmar surfaces of the 2nd through 5th fingers   flex the 2nd through 5th fingers, and assist to flex the wrist  
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pronator teres   medial epicondyle of the humerus, common flexor tendon and the ulna   the middle of the lateral surface of the radius   pronate the forearm, and assist to flex the elbow  
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pronator quadratis   the medial, anterior surface of the distal ulna   the lateral, anterior surface of the distal radius   pronate the forearm  
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supinator   the radial collateral ligament, the annular ligament, and the supinator crest of the ulna   lateral surface of the proximal shaft of the radius   supinate the forearm  
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opponens pollicis   flexor retinaculum, and the tubercle of the trapezium   the entire length of the 1st metacarpal bone on the radial side   opposition of the thumb at the carpometacarpal joint  
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adductor pollicis   the capitate, the 2nd and the 3rd metacarpals   the base of the proximal phalnge of the thumb   adduct the thumb, and assist in flexion of the thumb  
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extensor pollicis longus   the posterior surface of the ulna, and the interosseous membrane   the distal phalange of the thumb   extend the thumb, and assist to extend the thumb  
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extensor pollicis brevis   the posterior surface of the radius, and the interosseous membrane   the proximal phalange of the thumb   extend the thumb, and assist to extend the thumb  
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flexor pollicis longus   the anterior surface of the radius, and the interosseous membrane   the distal phalange of the thumb   flex the thumb, and assist to flex the thumb  
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abductor pollicis longus   the posterior surface of the radius, the ulna, and the inerosseous membrane   the base of the 1st metacarpal   abduct the thumb, and extend the thumb  
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errector spinae group (spinalis, iliocostalis, longissimus)   the common tendon that attaches tothe posterior surface of the sacrum, iliac crest, the spinous processes of the lumbar and the last 2 thoracic vertebrae   various attachments at the posterior ribs, the spinous and the transverse processes of the thoracic and the cervical vertabrae, and the mastoid process of the temporal bone   unilat: laterally flex the vertevral column to the same side, bilat: extend the vertebral column  
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multifidi and rotatores   multifidi: the sacrum, and the transverse porcesses of the lumbar through to the cervical vertebrae, rotatores: the tranverse processes of the lumbar through to the cervical vertebrae   the spinous processes of the lumbar vertabrae through to the 2nd cervical vertabrae   unilat: rotate the vertebral column to the opposite side, bilat: extend the vertevral column  
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semispinalis capitis   the transverse processes of the throacic vertabrae, and the articular processes of the lower cervicle vertebrae   the spinous processes of the upper thoracic and cervicle vertabrae and the superior nuchal line of the occiput   extend the head and the vertebral column  
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splenius capitis and cervicic   capitis: the legamentum nuchae, and the spinous processes of C7 to T3, cervicis: the spinous processes of T3 to T6   capitis: the mastoid process, and the lateral portion of the superior nuchal line, cervicis: the transverse processes of the upper cervical vertebrae   unilat: rotate the head and neck to the same side, laterally flex the head and neck,bilat: extend the head and neck  
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quadratus lumborum   posterior iliac crest   the last rib, and the transverse processes of L1 through L4   unilat: laterally tilt the pelvis, laterally flex the vertebral column to the same side, assist to extend the vertebral column, bilat: flex the last rib, during inhilation and forced exhilation  
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rectus abdominus   pubic crest, and the pubic symphasis   the cartilage of the 5th,6th, and 7th ribs, and the xiphoid process   flex the vertebral column  
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external oblique   lower 8 ribs   the anterior part of the iliac crest, and the abdominal aponeurosis to the linea alba   unilat: laterally flex the vertebral column to the same side, and rotate the vertebral column to the opposite side, bilat: flex the vertebral column, and compress the abdominal contents  
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internal oblique   lateral inguinal ligament, the iliac crest, and the thoracolumbar aponeurosis   the internal surface of the lower 3 ribs, andthe abdominal aponeurosis to the linea alba   unilat: lateraly flex the vertebral column to the same side, and rotate the vertebral column to the same side, bilat: flex the vertebral column, and compress abdominal contents  
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transverse abdominis   the lateral inguinal ligament, the iliac crest, thoracolumbar fascia, and the internal surface of the lower 6 ribs   the abdominal aponeurosis to the linea alba   compress the abdominal contents  
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diaphragm   costal: inner surface of the lower 6 ribs, lumbar: the upper 2 or 3 lumbar vertebrae, sternal: the inner part of the xiphoid process   cental tendon   draw down the central tendon of the diahragm, and increase the volume of the thoracic cavity during inhilation  
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intercostals   the inferior border of the rib above   the superior border of the rib below   external: assist with inhilation, internal: assist with exhilation  
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rectus femoris (quadriceps)   the anterior, inferior, iliac spine   tibial tuberosity   extend the knee, and flex the hip  
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vastus lateralis (quadriceps)   the lateral lip of the linea aspera, the gluteal tuberosity   tibial tuberosity   extend the knee  
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vastus intermedius (quadriceps)   the anterior and the lateral shaft of the femor   tibial tuberosity   extend the knee  
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vastus medialis (quadriceps)   the medial lip of the linea aspera   tibial tuberosity   extend the knee  
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biceps femoris (hamstrings)   long head: ischial tuberosity, short head: the lateral lip of the linea aspera   the head of the fibula   flex the knee, laterally rotate the flexed knee, extend the hip, laterally rotate the hip, and tilt the pelvis posteriorly  
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semitendinosus (hamstrings)   ischial tuberosity   the proximal medial shaft of the tibia at the pes anserinus tendon   flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, and tile the pelvis posteriorly  
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semimembranosus (hamstrings)   ischial tuberosity   the posterior aspect of the medial condyle of the tibia   flex the knee, medially rotate the flexed knee, extend the hip, medially rotate the hip, and tilt the pelvis posteriorly  
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adductor magnus (adductor group)   the inferior ramus of the pubis, ramus of the ischum, and the ischial tuberosity   the medial lip of the linea aspera, and the adductor tubercle   adduct the hip, medially rotate the hip, assist to flex the hip, posterior: extend the hip  
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adductor longus (adductor group)   pubic tubercle   the medial lip of the linea aspera   adduct the hip, medially rotate the hip, assist to flex the hip  
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adductor brevis (adductor group)   the inferior ramus of the pubis   the pectineal line, and the medial lip of the linea aspera   adduct the hip, medially rotate the hip, and assist to flex the hip  
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pectineus (adductor group)   the superior ramus of the pubi   the pectineal line of the femur   adduct the hip, medially rotate the hip, and assist to flex the hip  
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gracilis (adductor group)   the inferior ramis of the pubis and the ramus of the ischium   the proximal medial shaft of the tibia at the pes anserinus tendon   adduct the hip, medially rotate the hip, flex the knee and medially rotate the flexed knee  
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sartorius   anterior superior iliac spine   the proximal, media shaft of the tibia at the pes anserinus tendon   flex the hip, laterally rotate the hip, abduct the hip, flex the knee, and medially rotate the flexed knee  
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tensor fascia latae   the iliac crest, posterior to the anterior superior iliac spine   iliotibial tract   flex the hip, medially rotate the hip, and abduct the hip  
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gluteus maximus   coccyc, the edge of the sacrum, the posterior iliac crest, sacrotuberus and sacroiliac tract   upper: the gluteal tuberosity, lower: iliotibial tract   all: extend the hip, laterally rotate the hip and abduct the hip, lower: adduct the hip  
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gluteus minimus   the gluteal surface of the ilium between the anterior and inferior gluteal lines   the andteror border of the greater trochanter   abduct the hip, medially rotate the hip, and flex the hip  
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gluteus medius   the gluteal surface of the ilium between the iliac crest and the posterior and anterior gluteal lines   the greater trochanter   all: abduct the hip, anterior: flex the hip, and medially rotate the hip, posterior: extend the hip, and laterally rotate the hip  
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piriformis (lateral rotators)   the anterior surface of the sacrum   the greater trochanter   laterally rotate the hip, and abduct the hip when the hip is flexed  
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quadratus femoris (lateral rotators)   the lateral border of the ischial tuberosity   the intertrochanteric crest between the lesser and greater trochanters   laterally rotate the hip  
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obturator internus (lateral rotators)   the obturator membran and the inferior surface of the obturator foreamen   the medial surface of the greater trochanter   laterally rotate the hip  
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obturator externus (lateral rotators)   the superior and inferior rami of the pubis   the trochanter fossa of the femur   laterally rotate the hip  
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gemellus superior (lateral rotators)   the ischial spine   the upper border of the greater trochanter   laterally rotate the hip  
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gemellus inferior (lateral rotators)   the ischial tuberosity   the upper border of the greater trochanter   laterally rotate the hip  
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psoas major   the bodies and the transverse processes of the lumbar vertebrae   the lesser trochanter   flex the hip, adduct the hip, and laterally rotate the hip  
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iliacus   the iliac fossa   the lesser trochanter   flex the hip, adduct the hip, and laterally rotate the hip  
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gastrocnemius   condyles of the femur, the posterior surfaces   the calcaneus via the calcaneal tendon   flex the knee, and plantar flex the ankle  
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soleus   the soleal line, posterior surface of tibia, and proximal, posterior surface of fibula   the calcaneus via the calcaneal tendon   plantar flex the ankle  
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plantaris   the lateral condyle of the femur   the calcaneus via the calcaneal tendon   weak plantar flexion of the ankle, weak flexion of the knee  
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popliteus   lateral epicondyle of the femur   proximal, posterior aspect of the tibia   medially rotate the flexed knee, and flex the knee  
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peronius longus   the proximal 2/3 of lateral fibula   base of the 1st metatarsal and medial cuneiform   evert the foot, and assist to plantar flex the ankle  
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peronius brevis   the distal 2/3 of lateral fibula   tuberosit of 5th metatarsal   evert the foot, and assist to plantar flex the ankle  
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tibialis anterior (extensors of ankle and foot)   proximal, lateral surface of the tibia, and interosseious membrane   medial cuneiform, and the base of the 1st metatarsal   invert the foot, dorsiflex the ankle  
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extensor digitorum longus (extensors of ankle and foot)   proximal anterior shaft of the fibula, and the interosseous membrane   middle and distal phalanges of the 2nd through 5th toes   extend the 2nd through 5th toes, dorsiflex the ankle, and evert the foot  
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extensor hallucis longus (extensors of ankle and foot)   middle anterior surface of fibula, and the interosseous membrane   distal phalange of 1st toe   extend the 1st toe, dorsiflex the ankle, and invert the foot  
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tibialis posterior (flexors of ankle and foot)   proximal posterior shaft of tibia, proximal fibula, and the interosseous membrane   navicular, cuneiforms, cuboid, and the bases of 2nd through 4th metatarsals   invert the foot, and plantar flex the ankle  
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flexor digitorum longus (flexor of ankle and foot)   middle posterior surface of tibia   distal phalanges of the 2nd through 5th toes   flex the 2nd though 5th toes, weak plantar flexion of the ankle, and invert the foot  
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flexor hallucis longus (flexor of ankle and foot)   middle half of posterior fibula   distal phalange of 1st toe   flex the 1st toe, weak plantar flextion of the ankle, and invert the foot  
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flexor digitorum brevis   calcaneous plantar surface   the middle phalanges of the 2nd through 5th toes   flex the middle phalanges of the 2nd though 5th toes  
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abductor hallucis   calcaneous plantar surface   proximal phalange of the 1st toe, and the medial sesamoid bone   abduct the 1st toe, and assist to flex the 1st toe  
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abductor digiti minimi   calcaneous plantar surface   proximal phalange of 5th toe lateral side   flex the 5th toe and assist to abduct the 5th toe  
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sternocleidomastoid   sternal head: top of the manubrium, clavicular head: medial 1/3 of the clavicle   mastoid process and the lateral portion of the superior nuchal line   unilat: flex the head and neck to the same side, rotate the head and neck to the opposite side, bilat: flex the neck, assist with inhilation by elevating the rib cage  
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anterior scalene   anterior tubercles of the transverse processes of C3-C6   the 1st rib   unilat: laterlly flex the head and neck to the same side when the 1st rib is fixed, rotate the head and neck to the opposite side, bilat: elevate the ribs during inhilation, flex the head and neck  
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middle scalene   transvers processes of C2-C7   the 1st rib   unilat: with the ribs fixed, laterally flex the head and neck to the same side, rotate the head and neck to the opposite side, bilat: elevate the ribs during inhilation  
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posterior scalene   transverse processes of C5 and C6   2nd rib   unilat: with the ribs fixed, laterally flex the head and neck to the same side, rotate head and neck to the opposite side, bilat: elevate the ribs during inhilation  
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masseter   zygomatic arch   angle and ramus of the mandible   elevate the mandible  
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temporalis   temporal fossa and fascia   coronoid process of the mandible   elevate and retract the mandible  
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medial pterygoid   medial surface of lateral pterygoid plate and the tuberosity of the maxilla   medial surface of the ramus of the mandible   unilat: laterally deviate the mandible to the opposite side, bilat: elevate the mandible, protract the mandible  
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lateral pterygoid   superior: infratemporal surface crest of greater wing of the sphenoid bone, inferior: lateral surface of the lateral pterygoid plate of the sphenoid bone   articula disc and capsule of tmj, neck of mandible   unilat: laterally deviate the mandible to the opposite side, bilat: protract the mandible  
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