Muscle OIA Flashcards
Masseter
O- zygomatic arch
I- mandibular angle and rams
A- elevates mandible
Temporalis
O- temporal fossa of the temporal bone
I- Coronoid process of mandible
A- elevates mandible and retract mandible
Sternocleidomastoid
O- manubrium, medial clavicle
I- mastoid process of temporal bone
A- flex and rotate the head
Scalenes
O- transverse process if the cervical vertebrae
I- anterior surface of ribs 1-2
A- elevate ribs 1-2, flexes neck, rotate neck
pectoralis major
O- sternal end of the clavicle, sternum, ribs 1-6
I- greater tubercle of the humerus
A- flexes arm at shoulder, rotates arm medially, adducts arm
pectoralis minor
O- ribs 3-5
I- coracoid process of scapula
A- depresses scapula, rotates scapula downward
serratus anterior
O- ribs 1-8
I- vertebral border of scapula
A- rotate scapula upwards, protracts scapula
external intercostals
O- inferior border of ribs
I- superior border of ribs
A- elevate rib cage
internal intercostals
O- superior border of ribs
I- inferior border of ribs
A- depress rib cage
external oblique
O- ribs 5-12
I- linea alba, pubic crest, pubic tubercle, iliac crest
A- flexes and rotates vertebral column, compresses abdomen
internal oblique
O- lumbar fascia, iliac crest, inguinal ligament
I- linea alba, pubic crest, ribs 9-12
A- flexes and rotates vertebral column, compresses abdomen
rectus abdominis
O- pubic crest, pubic symphysis
I- xiphoid process of the sternum, ribs 5-7
A- flexes and rotates vertebral column, compress abdomen
iliacus
O- iliac fossa, ala of the sacrum
I- lesser trochanter of the femur
A- flexes thigh at hip, flexes trunk
psoas major
O- transverse processes of T12-L5
I- lesser trochanter of the femur
A- flexes thigh at hip, flexes trunk laterally
deltoid
O- lateral 1/3 of clavicle, spine of scapula, acromion process of scapula
I- deltoid tuberosity if the humerus
A- abducts arm, flexes arm at shoulder, rotates arm medially, extends arm at shoulder, rotates arm laterally
Biceps brachii long head
O- supraglenoid tubercle of the scapula
I- radial tuberosity
A- flexes forearm at the elbow, supinate forearm
Biceps brachia short head
O- coracoid process of the scapula
I- radial tuberosity
A- flexes forearm at elbow, supinates forearm
Brachialis
O- anterior humerus
I- coronoid process of the ulna
A- flexes forearm at elbow
coracobrachialis
O- coracoid process
I- medial surface of shaft of humerus
A- flexes arm at shoulder, adducts arm
brachioradialis
O- lateral supracondylar ridge of humerus
I- styloid process of the radius
A- flexes forearm at elbow, stabilizes elbow during flexion and extension
extensor carpi radialis longus
O- lateral supracondylar ridge of humerus
I- 2nd metacarpal
A- extends hand at wrist, abducts hand
extensor carpi radialis brevis
O-lateral epicondylar ridge of humerus
I- 3rd metacarpal
A- extends hand at wrist, abducts hand
extensor digitorum
O- lateral epicondylar of humerus
I- distal phalanges of 2nd to 5th digit
A- extends distal interphalangeal joints, extends hand at wrist
extensor carpi ulnaris
O- lateral epicondyle of the humerus, posterior ulna
I- 5th metacarpal
A- extends hand at wrist, adducts hand
supinator
O- lateral epicondyle of the humerus, proximal ulna
I- proximal end of radius
A- supinates forearm
abductor pollicis longus
O- posterior radius, posterior ulna, interosseous membrane
I- trapezium, 1st metacarpal
A- abducts pollex
extensor pollicis brevis
O- posterior radius, posterior ulna, interosseous membrane
I- proximal phalanx of pollen
A- extends 1st metacarpal-phalangeal joint
extensor pollicis longus
O- posterior radius, posterior ulna, interosseous membrane
I- distal phalanx polled
A- extends 1st interphalangeal joint
extensor indicis
O-posterior ulna, interosseous membrane
I- distal phalanx of 2nd digit
A- extends 2nd distal interphalangeal joint
extensor digiti minimi
O- lateral epicondyle of the humerus
I- distal phalanx of 5th digit
A- extends 5th distal interphalangeal joint
sartorius
O- anterior superior iliac spine
I- medial surface of proximal tibia
A- flexes thigh at hip, rotates thigh laterally, abducts thigh, flexes leg at knee
tensor fascia latae
O- anterior superior iliac spine, iliac crest
I- iliotibial tract
A- flexes thigh at hip, abducts thighs, rotates thigh medially
iliopsoas
O- iliac fossa, ala of the sacrum, transverse process of T12-L5
I- lesser trochanter of the femur
A- flexes thigh at hip, flexes vertebral column
pectineus
O-superior rams of the pubis
I- linea aspera
A- adducts thigh, flexes thigh at hip, rotates thigh medially
rectus femoris
O- anterior inferior iliac spine
I- patella and tibial tuberosity via tendon of quadriceps femoris and patellar ligament
A- extends leg at knee, flexes thigh at hip
vastus lateralis
O- greater trochanter, intertrochanteric line, lines aspera of the femur
I- patella and tibial tuberosity via tendon of quadriceps femoris and patellar ligament
A- extends leg at knee, stabilizes knee
vastus medialis
O- linea aspera, interochanteric line of femur
I- patella and tibial tuberosity via tendon of quadriceps femoris and patellar ligament
A- extends leg at knee, stabilizes patella
vastus intermedius
O- proximal shaft of femur
I- patella and tibial tuberosity via tendon of quadriceps femoris and patellar ligament
A- extends leg at knee
gracilis
O- inferior ramus of pubis, body of pubis
I- medial surface of tibia
A- adducts thigh, flexes leg at knee, rotates leg medially
adductor longus
O- pubis (near pubic symphysis)
I- linea aspera of the femur
A- adducts thigh, flexes thigh at hip, rotates thigh medially
adductor brevis
O- body of the pubis, inferior rams of the pubis
I- linea aspera, adductor tubercle
A- adducts thigh, rotates thigh medially
adductor magnus
O- inferior rams of the pubis, ischial rams, ischial tuberosity
I- linea apera, adductor tubercle
A- adducts thigh, rotates thigh medially, flexes thigh at hip
tibialis anterior
O- lateral condyle of the tibia, interosseous membrane
I- medial cuneiform, 1st metatarsal
A- dorsiflexes foot at ankle, inverts foot
extensor hallucis longus
O- proximal shaft of the fibula, interosseous membrane
I- distal phalanx of the big toe
A- dorsiflexes foot at ankle, extends great toe
extensor digitorum longus
O- lateral condyle of the tibia, proximal fibula, interosseous membrane
I- middle and distal phalanges of 2-5 digits
A- extends 2-5 distal interphalangeal joints
fibularis tertius
O- distal shaft of fibula, interosseous membrane
I- 5th metatarsal
A- dorsiflexes foot at ankle, everts foot
fibularis longus
O- head of fibula
I- medial cuneiform, 1st metatarsal
A- plantar flexes foot at ankle, everts foot
fibularis brevis
O-distal shaft of fibula
I- 5th metatarsal
A- plantar flexes foot at ankle, everts foot
trapezius
O- occipital bone, spinous process of C7-T12
I- lateral 1/2 clavicle, spine of scapula, acromion process of scapula
A- elevates scapula, depress scapula, rotates scapula, adducts scapula
latissimus dorsi
O-spinous process of T7-12, ribs 9-12, iliac crest
I- intertubercular groove of the humerus
A- extends arm at shoulder, adducts arm, rotates arm medially
levator scapula
O- transverse processes of C1-C4
I- vertebral border of the scapula
A- elevates scapula, downwardly rotate scapula
rhomboid major
O- spinous process of T2-T5
I- vertebral border of scapula
A- adducts scapula, downwardly rotates scapula
rhomboid minor
O- spinous processes of C7-T1
I- vertebral border of the scapula
A- adducts scapula, downwardly rotates scapula
Supraspinatus
O- supraspinous fossa of scapula
I- greater tubercle of humerus
A- abducts arm
Infraspinatous
O- infraspinous fossa of scapula
I- greater tubercle of humerus
A- rotates arem laterally
teres major
O- inferior angle of scapula
I- lesser tubercle of humerus
A- adducts arm, extends arm at shoulder, rotates arm medially
Teres minor
O- lateral border of scapula
I- greater tubercle of humerus
A- rotates arm laterally
subscapularis
O- sub scapular fossa
I- lesser tubercle of humerus
A- rotates warm medially
splenius capitis
O- spinous process pf C6-T7
I- mastoid process of temporal bone, occipital bone
A- extends vertebral column
semispinalis capitis
O- transverse processes of C7-T12
I- occipital bone
A- extends vertebral column
iliocostalis
O- iliac crest, ribs 3-12
I- inferior border of ribs, transfers process of C4-C6
A- extends vertebral column
longissimus
O- transverse process of C4-L5
I- mastoid process of temporal bone
A- extends vertebral column
spinalis
O- spinous process of T7-L3
I- spinous process of C4-T6
A- extends vertebral column
triceps brachia long head
O- infraglenoid tubercle of scapula
I- olecranon process of ulna
A- extends forearm at elbow
triceps brachii lateral head
O- posterior surface of shaft of humerus
I- olecranon process of ulna
A- extends forearm at ulna
triceps brachii medial head
O- posterior surface of shaft of humerus
I- olecranon process of ulna
A- extends forearm at elbow
flexor carpi radialis
O- medial epicondyle of humerus
I- 2nd and 3rd metacarpals
A- flexes hand at wrist, abducts hand
palmaris longus
O- medial epicondyle of humerus
I- palmar aponeurosis
A- flexes hand at wrist
flexor carpi ulnaris
O- medial epicondyle of humerus, olecranon process of ulna, shaft of ulna
I- pisiform, hamate, 5th metacarpal
A- flexes hand at wrist, adducts hand
flexor digitorum superficialis
O- medial epicondyle of humerus, coronoid process of ulna, shaft of radius
I- middle phalanges of 2nd- 5th digit
A- flexes hand at wrist, flexes proximal interphalangeal joint
flexor digitorum profundus
O- ulna and interosseous membrane
I- distal phalangeal of 2nd to 5th digit
A- flexes distal interphalangeal joints
flexor pollicis longus
O- anterior radius and interosseous membrane
I- distal phalanx or polled
A- flexes 1st interphalangeal joint
pronator quadratus
O- distal and anterior ulna
I- distal and anterior radius
A- pronation
pronator teres
O- medial epicondyle of humerus
I- lateral radius
A- pronation
abductor pollicis brevis
O- scaphoid, trapezium, flexor retinaculum
I- proximal phalanx of pollex
A- abducts pollex
opponens pollicis
O- trapezium, flexor retinaculum
I- 1st metacarpal
A- opposition
flexor pollicis brevis
O- trapezium, flexor retinaculum
I- proximal phalanx of pollex
A- flexes pollex
adductor pollicis
O- capitate, base of 2nd - 4th metacarpals
I-proximal phalanx of pollex
A- adducts thumb, opposition
gluteus maximus
O- posterior surface of ala of ilium, sacrum, coccyx
I- iliotibial tract, gluteal tuberosity of femur
A- extends thigh at hip, rotates thigh laterally, abducts thigh
gluteus medius
O- lateral surface of ilium
I- greater trochanter of femur
A- abducts thigh, rotates thigh medially
gluteus minimis
O- lateral surface of ilium
I- greater trochanter of femur
A- abducts thigh, rotates thigh medially
piriformis
O- lateral surface of sacrum
I- greater trochanter of femur
A- rotates thigh laterally when hip is extended
quadratus femoris
O- ischial tuberosity
I- intertrochanteric crest of femur
A- rotates thigh laterally
biceps femurs long head
O- ischial tuberosity, linea aspera of femur
I- head of fibula, lateral condyle of tibia
A- extends thigh at hip, flexes leg at knee, rotates leg laterally
biceps femurs short head
O- linea asper of femur
I- head of fibula, lateral condyle of tibia
A- flexes leg at knee, rotates leg laterally
semitendinosus
O- ischial tuberosity
I- medial surface of proximal shaft of tibia
A- extends thigh at hip, flexes thigh at leg, rotates leg medially
semimembranosus
O- ischial tuberosity
I- medial condyle of tibia
A- extends thigh at hip, flexes leg at knee, rotates leg medially
gastrocnemius
O- lateral condyle of femur, medial condyle of femur
I- calcaneus
A- plantar flexes the foot at ankle
soleus
O- proximal tibia, proximal fibula, interosseous membrane
I- calcaneus
A- plantar flexes foot at ankle
tibialis posterior
O- proximal tibia, proximal fibula, interosseous membrane
I- navicular bone, 2nd - 4th metatarsal
A- plantar flexes foot at ankle, inverts foot
flexor digitorum longus
O- posterior shaft of tibia
I- distal phalanges of 2nd-5th digits
A- plantar flexes foot at ankle, inverts foot, flexes 2nd-5th distal interphalangeal joints
flexor hallucis longus
O- middle shaft of fibula, interosseous membrane
I- distal phalanx of hallux
A- plantar flexes foot at ankle, inverts foot, flexes big toe
