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57 Cards in this Set

  • Front
  • Back
temporalis
origin-tempoal fossa
insertion-coronoid process of mandible
action-closes jaw; elevates and retracts mandible
Masseter
origin-zygomatic arch and maxilla
insertion-angle and ramus of mancloses jaw and elevates mandibledible
action-
Platysma
origin-fascia of chest and deltoid
insertion-lower margin of mandible, skin, and muscle at corner of mouth
action-depresses mandible; pulls lower lip back and down
Sternocleidomastoid
origin-manubrium of sternum and medial portion of clavicle
insertion-mastoid process of temporal bone and superior nuchal line of the occipital bone
action-simultaneous contraction of both muscles of pair causes flexion of neck forward, generaly against resistance; acting independently, rotate head toward shoulder on opposite side
Trapezious
origin-occipital bone; ligamentum nuchae; spines of C7 and all thoracic vertebrae
insertion-acromion and spinous process of scapula; lateral third of clavicle
Supraspinatus
origin-supraspinous fossa of scapula
insertion-greater tubercle of humerous
action-assist abduction of humerous; stabilizes shoulder joint
Infraspinatus
origin-infraspinous fossa of scapula
insertion-greater tubercle of humerous
action-lateral rotation of humerous; helps hold head of humerous in glenoid cavity; stabalizes shoulder
Teres minor
origin-lateral margin of scapula
insertion-greater tubercle of humerous
action-as for infraspinatous
Teres Major
origin-posterior surface at inferior angle of scapula
insertion-intertubercular groove of humerous
action-extends, medially rotates, and adducts humerous; synergist of latissimus dorsi
Rhomboids
origin-spinous processes of C7 and T1-T5
insertion-medal border of scapula
action-pulls scapula medially; stabilizes scapula; rotates glenoid cavity downward
Latissimus dorsi
origin-indirestm attachment to spinous processes of lower six thoracic vertebrae, lumbar vertebrae, last three to four ribs, and iliac crest
insertion-floor of intertubular groove of humerous
action-prime mover of arm extension; adducts and medially rotates arm; depresses scapula; brings arm down in power stroke, as in sstriking a blow
Deltoid
origin-lateral 1/3 of clavicle; acromion and spineof scapula
insertion-deltoid tuberosity of humerous
action- acting as a whole, prime mover of arm abduction; when only specific fibers are active, can aid in flexion,extension, and rotation of humerous
Pectoralis minor
origin-anterior surface of ribs 3-5, near their costal cartilages
insertion-coracoid process of scapula
action-with ribs fixed, draws scapula forward and inferiorly; with scapula fixed; draws rib cage superiorly
Pectoralis major
origin-clavicle, sternum, cartilage of ribs 1-6, and aponeurosis of external oblique muscle
insertion-fibers converge to insert by short tendon into intertubercular groove of humerous
action-prime mover of arm flexion; adducts, medially roates arm; with arm fixed, pulls chest upward
Serratus anterior
origin-lateral aspect of ribs 1-8
insertion-vertebral border of anterior surface of scapula
action-moves scapula forward toward chest wall; roates scapula, causing inferior angle to move laterally and upward; abduction and raising of arm
External Intercostals
origin-inferior border of ribabove
insertion-superior border of below
action-pulls ribs toward one another to elevate rib cage; aids in inspiration
Internal Intercostals
origin-superior border of rib below
insertion-inferior border of rib above
action-draws ribs together to depress rib cage; aids in forced expiration; antagonistic to external intercostals
Triceps Brachii
origin-long head-inferiormargin of glenoid cavity; lateral head-posterior humerous; medial head-distal radial groove on posterior humerour
insertion-olecranon process of ulna
action-powerful forearm extensor; antagonist of forearm flexors
Biceps Brachii
origin-short head; coracoid process; tendon on lond head runs in intertubular groove and within capsule of shoulder join
insertion-radial tuberosity
action-flexion of elbow and supination of forear; weak arm flexor
Brachialis
origin-distal portion of anterior humerous
insertion-coronoid process of ulna
action-a major flexor of forearm
Rectus abdominis
origin-pubic crest and symphysis
insertion-xiphoid process and costal cartilages of ribs 5-7
action-flexes and rotates vertebral column; increases abdominal pressure; fixes and depresses ribs; stabilizes pelvis during walking
External oblique
origin-anterior surface of last eight ribs
insertion- linea alba, pubic crest and tubercles, and iliac crest
action-flexes and rotates vertebral column; also aids muscles of back in trunk rotation and lateral flexion
Internal oblique
origin-lumbas fascia, iliac crest, and inguinal ligament
insertion-linea alba, pubic crest, and costall cartilages of last three ribs
action-as for external oblizue
Transversus abdominis
origin-inguinal ligament, iliac crest, cartilages of last five or six ribs, and lumbar fascia
insertion-linea alba and pubic crest
action-compresses abdominal contents
Gluteus maximus
origin-dorsal ilium, sacrum, and coccyx
insertion-gluteal tuberosity of femur and iliotibial tract
action-comlex, powerful thigh extensor;antagonist of iliopsoas; laterally rotates and abducts thigh
Gluteus medius
origin-upper lateral surface of ilium
insertion-greater trochanter of femur
action-abducts and medially rotates thigh; steadies pelvis during walking
Gluteus minimus
origin-external inferior surface of ilium
insertion-greater trochanter of femur
action-abducts and medially rotates thigh; steadies pelvis
Tensor fasciae latae
origin-anterior aspect of iliac crest and anterior superior iliac spine
insertion-iliotibial tract
action-flexes, abducts, and medially rotates thigh; steadies trunk
Sartorius
origin-anterior superior iliac spine
insertion-by and aponeurosis into medial aspect of proximal tibia
action-flexes, abducts, and laterally rotates thigh; flexes knee
Adductor longus
origin-pubis near pubic symphysis
insertion-linea aspera
action-adduct and medially rotate and flex thigh
Adductor Brevis
origin-body and inferiorramus of pubis
insertion-linea aspera
action-adduct and medially rotate and flex thigh
Adductor magnus
origin-ischial and pubic rami and ischial tuberosity
insertion-linea aspera and adductor tubercle of femur
action-adduct and medially rotate and flex thigh; also a synergist in thigh extension
Gracilis
origin-inferior ramus and body of pubis
insertion-medial surface of tibia just inferior to medial condyle
action-adducts tigh; flexes and medially rotates leg, especially during walkin
Recus femoris
origin-anterior inferior iliac spine and superior margin of acetabulum
insertion-tilial tubersity and patella
action-extends knee and flexes thigh at hip
Vastus lateralis
origin-greater trochanter, intertrochanteric line, and linea aspera
insertion-tibial tuberosity and patella
action-extends and stabilizes knee
Vastus medialis
origin-linea aspera and intertrochanteris line
insertion-tibial tuberosity and patella
action-extends knee; stabilizes patella
Vastus intermedius
origin-anterior and lateral surface of femur
insertion-tibial tuberosity and patella
action-estends knee
Biceps femoris
origin-ischial tuberosity; linea aspera and distal femur
insertion-tendon passes laterally to insert into head of fibula and lateral condyle of tibia
action-extends thigh; laterally rotates leg, flexes knee
Semitendinosus
origin-ischial tuberosity
insertion-medial aspect of uper tibial shaft
action- extends thigh; flexes knee. medially rotates leg
Semimembranosus
origin-ischial tuberosity
insertion-medial condyle of tibia; lateral condyle of femur
action-extends thigh; flexes knee; medially rotates leg
Gastrocnemius
origin-by two heads from medial and lateral condyles of femur
inseriton-calcaneus via calcaneal tendon
action-plantar fleses foot when knee is extended; crosses knee joint; thus can flex knee
Soleus
origin-proximal portion of tibia and fibula; interosseous membrane
insertion-calcaneus via calcaneal tendon
action-plantar flexion; is an important muscle for locomotion
External Intercostals
origin-inferior border of ribabove
insertion-superior border of below
action-pulls ribs toward one another to elevate rib cage; aids in inspiration
Internal Intercostals
origin-superior border of rib below
insertion-inferior border of rib above
action-draws ribs together to depress rib cage; aids in forced expiration; antagonistic to external intercostals
Triceps Brachii
origin-long head-inferiormargin of glenoid cavity; lateral head-posterior humerous; medial head-distal radial groove on posterior humerour
insertion-olecranon process of ulna
action-powerful forearm extensor; antagonist of forearm flexors
Biceps Brachii
origin-short head; coracoid process; tendon on lond head runs in intertubular groove and within capsule of shoulder join
insertion-radial tuberosity
action-flexion of elbow and supination of forear; weak arm flexor
Brachialis
origin-distal portion of anterior humerous
insertion-coronoid process of ulna
action-a major flexor of forearm
Rectus abdominis
origin-pubic crest and symphysis
insertion-xiphoid process and costal cartilages of ribs 5-7
action-flexes and rotates vertebral column; increases abdominal pressure; fixes and depresses ribs; stabilizes pelvis during walking
External oblique
origin-anterior surface of last eight ribs
insertion- linea alba, pubic crest and tubercles, and iliac crest
action-flexes and rotates vertebral column; also aids muscles of back in trunk rotation and lateral flexion
Internal oblique
origin-lumbas fascia, iliac crest, and inguinal ligament
insertion-linea alba, pubic crest, and costall cartilages of last three ribs
action-as for external oblizue
Transversus abdominis
origin-inguinal ligament, iliac crest, cartilages of last five or six ribs, and lumbar fascia
insertion-linea alba and pubic crest
action-compresses abdominal contents
Gluteus maximus
origin-dorsal ilium, sacrum, and coccyx
insertion-gluteal tuberosity of femur and iliotibial tract
action-comlex, powerful thigh extensor;antagonist of iliopsoas; laterally rotates and abducts thigh
Gluteus medius
origin-upper lateral surface of ilium
insertion-greater trochanter of femur
action-abducts and medially rotates thigh; steadies pelvis during walking
Gluteus minimus
origin-external inferior surface of ilium
insertion-greater trochanter of femur
action-abducts and medially rotates thigh; steadies pelvis
Tensor fasciae latae
origin-anterior aspect of iliac crest and anterior superior iliac spine
insertion-iliotibial tract
action-flexes, abducts, and medially rotates thigh; steadies trunk
Sartorius
origin-anterior superior iliac spine
insertion-by and aponeurosis into medial aspect of proximal tibia
action-flexes, abducts, and laterally rotates thigh; flexes knee
Adductor longus
origin-pubis near pubic symphysis
insertion-linea aspera
action-adduct and medially rotate and flex thigh