Muscle OIA Flashcards
What is the origin of the masseter?
Zygomatic arch
What is the insertion of the masster?
Mandibular angle and mandibular ramus
What is the action of the masseter?
Elevates mandible
What is the origin of the temporalis?
Temporal fossa
What is the insertion of the temporalis?
Coronoid process of the mandible
What is the action of the temporalis?
Elevates mandible
Retracts mandible
What is the origin of the sternocleidomastoid?
Manubrium and medial clavicle
What is the insertion of the sternocleidomastoid?
Mastoid process
What is the action of the sternocleidomastoid?
Flexes head
Rotates head
What is the origin of the scalenes?
Transverse processes of the cervical vertebrae
What is the insertion of the scalenes?
Anterior surface of ribs 1 + 2
What is the action of the scalenes?
Elevates ribs 1+2
Flexes head
Rotates neck
What is the origin of pectoralis major?
Sternal end of the clavicle
Clavicle
Ribs 1-6
What is the insertion of pectoralis major?
Greater tubercle
What is the action of pectoralis major?
Flexes arm at shoulder
Rotates arm medially
Adducts arm
What is the origin of pectoralis minor?
Ribs 3-5
What is the insertion of pectoralis minor?
Coracoid process of scapula
What is the action of pectoralis minor?
Depresses scapula
Rotates scapula downwards
What is the origin of serratus anterior?
Ribs 1-8
What is the insertion of serratus anterior?
Vertebral border of the scapula
What is the actions of serratus anterior?
Rotates scapula upwards
Protracts scapula
What is the origin of the external intercostals?
Inferior border of ribs
What is the insertion of the external intercostals?
Superior border of ribs
What is the action of the external intercostals?
Elevates rib cage
What is the origin of the internal intercostals?
Superior border of ribs
What is the insertion of the internal intercostals?
Inferior border of ribs
What is the action of the internal intercostals?
Depresses rib cage
What is the origin of external oblique?
Ribs 5-12
What is the insertion of external oblique?
Linea alba
Pubic crest
Pubic tubercle
Iliac crest
What is the action of the external obliques?
Flexes and rotates vertebral column
Compresses abdomen
What is the origin of the internal obliques?
Lumbar fascia
Iliac crest
Inguinal ligament
What is the insertion of the internal obliques?
Linea alba
Pubic crest
Ribs 5-12
What is the action of the internal obliques?
Flexes and rotates vertebral column
Compresses abdomen
What is the origin of rectus abdominis?
Pubic crest
Pubic symphysis
What is the insertion of rectus abdominis?
Xiphoid process
Ribs 5-7
What is the action of rectus abdominis?
Flexes and rotates vertebral column
Compresses abdomen
What is the origin of iliacus?
Iliac fossa
Ala of sacrum
What is the insertion of iliacus?
Lesser trochanter of the femur
What is the action of iliacus?
Flexes thigh at hip
Flexes trunk
What is the origin of psoas major?
Transverse processes of T12 - L5
What is the insertion of psoas major?
Lesser trochanter of the femur
What is the action of psoas major?
Flexes thigh at hip
Flexes trunk laterally
What is the origin of the deltoid?
Lateral 1/3 of clavicle
Spine of scapula
Acromion process of scapula
What is the insertion of the deltoid?
Deltoid tuberosity
What is the action of the deltoid?
Abducts arm Flexes arm at shoulder Extends arm at shoulder Rotates arm medially Rotates arm laterally
What is the origin of the long head of biceps brachii?
Supraglenoid tubercle
What is the origin of the short head of biceps brachii?
Coracoid process
What is the insertion of biceps brachii?
Radial tuberosity
What is the action of biceps brachii?
Flexes forearm at elbow
Supinates forearm
What is the origin of brachialis?
Anterior humerus
What is the insertion of brachialis?
Coronoid process of ulna
What is the action of brachialis?
Flexes forearm at elbow
What is the origin of coracobrachialis?
Coracoid process
What is the insertion of coracobrachialis?
Medial surface of shaft of humerus
What is the action of coracobrachialis?
Flexes arm at shoulder
Adducts arm
What is the origin of brachioradialis?
Lateral supracondylar ridge of humerus
What is the insertion of brachioradialis?
Styloid process of radius
What is the action of brachioradialis?
Flexes forearm at elbow
Stabilizes elbow during flexion/extension
What is the origin of extensor carpi radialis longus?
Lateral supracondylar ridge of humerus
What is the insertion of extensor carpi radialis longus?
2nd metacarpal
What is the action of extensor carpi radialis longus?
Extends hand at wrist
Abducts hand
What is the origin of extensor carpi radialis brevis?
Lateral epicondyle of humerus
What is the insertion of extensor carpi radialis brevis?
3rd metacarpal
What is the action of extensor carpi radialis brevis?
Extends hand at wrist
Abducts hand
What is the origin of extensor digitorum?
Lateral epicondyle of humerus
What is the insertion of extensor digitorum?
Distal phalanges of digits 2-5
What is the action of extensor digitorum?
Extends distal interphalangeal joints
Extends hand at wrist
What is the origin of extensor carpi ulnaris?
Lateral epicondyle of humerus
Posterior ulna
What is the insertion of extensor carpi ulnaris?
5th metacarpal
What is the action of extensor carpi ulnaris?
Extends hand at wrist
Adducts hand
What is the origin of the supinator?
Lateral epicondyle of humerus
Proximal ulna
What is the insertion of the supinator?
Proximal end of radius
What is the action of the supinator?
Supinates forearm, obviously
What is the origin of abductor pollicis longus?
Posterior radius
Posterior ulna
Interosseous membrane
What is the insertion of abductor pollicis longus?
Trapezium
1st metacarpal
What is the action of abductor pollicis longus?
Abducts pollex
What is the origin of extensor pollicis brevis?
Posterior radius
Posterior ulna
Interosseous membrane
What is the insertion of extensor pollicis brevis?
Proximal phalanx of pollex
What is the action of extensor pollicis brevis?
Extends 1st metacarpal-phalangeal joint
What is the origin of extensor pollicis longus?
Posterior radius
Posterior ulna
Interosseous membrane
What is the insertion of extensor pollicis longus?
Distal phalanx of pollex
What is the action of extensor pollicis longus?
Extends 1st interphalangeal joint
What is the origin of extensor indicis?
Posterior ulna
Interosseous membrane
What is the insertion of extensor indicis?
Distal phalanx of 2nd digit
What is the action of extensor indicis?
Extends 2nd distal interphalangeal joint
What is the origin of extensor digiti minimi?
Lateral epicondyle of humerus
What is the insertion of extensor digiti minimi?
Distal phalanx of 5th digit
What is the action of extensor digiti minimi?
Extends 5th distal interphalangeal joint
What is the origin of sartorius?
Anterior superior iliac spine
What is the insertion of sartorius?
Medial surface of proximal tibia
What is the action of sartorius?
Flexes thigh at hip
Rotates thigh laterally
Abducts thigh
Flexes leg at knee
What is the origin of tensor fascia latae?
Anterior superior iliac spine
Iliac crest
What is the insertion of tensor fascia latae?
Iliotibial tract
What is the action of tensor fascia latae?
Flexes thigh at hip
Abducts thigh
Rotates thigh medially
What is the origin of iliopsoas?
Iliac fossa
Ala of sacrum
Transverse processes of T12 - L5
What is the insertion of iliopsoas?
Lesser trochanter
What is the action of iliopsoas?
Flexes thigh at hip
Flexes vertebral column
What is the origin of pectineus?
Superior famous of pubis
What is the insertion of pectineus?
Linea aspera
What is the action of pectineus?
Adducts thigh
Flexes thigh at hip
Rotates thigh medially
What is the origin of rectus femoris?
Anterior inferior iliac spine
What is the insertion of rectus femoris?
Patella
Tibial tuberosity
What is the action of rectus femoris?
Extends leg at knee
Flexes thigh at hip
What is the origin of vastus lateralis?
Greater trochanter
Intertrochanteric line
Linea aspera
What is the insertion of vastus lateralis?
Patella
Tibial tuberosity
What is the action of vastus lateralis?
Extends leg at knee
Stabilizes knee
What is the origin of vastus medialis?
Linea aspera
Intertrochanteric line
What is the insertion of vastus medialis?
Patella
Tibial tuberosity
What is the action of vastus medialis?
Extends leg at knee
Stabilizes patella
What is the origin of vastus intermedius?
Proximal shaft of femur
What is the insertion of vastus intermedius?
Patella
Tibial tuberosity
What is the action of vastus intermedius?
Extends leg at knee
What is the origin of gracilis?
Inferior ramus and body of pubis
What is the insertion of gracilis?
Medial surface of tibia
What is the action of gracilis?
Adducts thigh
Flexes leg at knee
Rotates leg medially
What is the origin of adductor longus?
Pubis (near pubic symphysis)
What is the insertion of adductor longus?
Linea aspera of femur
What is the action of adductor longus?
Adducts thigh
Flexes thigh at hip
Rotates thigh medially
What is the origin of adductor brevis?
Inferior ramus and body of pubis
What is the insertion of adductor brevis?
Linea aspera
Adductor tubercle
What is the action of adductor brevis?
Adducts thigh
Rotates thigh medially
What is the origin of adductor magnus?
Inferior ramus of the pubis
Ischial ramus
Ischial tuberosity
What is the insertion of adductor magnus?
Linea aspera
Adductor tubercle
What is the action of adductor magnus?
Adducts thigh
Rotates thigh medially
Flexes thigh at hip
What is the origin of tibialis anterior?
Lateral condyle of tibia
Interosseous membrane
What is the insertion of tibialis anterior?
Medial cuneiform
1st metatarsal
What is the action of tibialis anterior?
Dorsiflexes foot at ankle
Inverts foot
What is the origin of extensor hallucis longus?
Proximal shaft of fibula
Interosseous membrane
What is the insertion of extensor hallucis longus?
Distal phalanx of the big toe
What is the action of extensor hallucis longus?
Dorsiflexes foot at ankle
Extends big toe
What is the origin of extensor digitorum longus?
Lateral condyle of tibia
Proximal fibula
Interosseous membrane
What is the insertion of extensor digitorum longus?
Middle and distal phalanges of 2nd - 5th toes
What is the action of extensor digitorum longus?
Extends 2nd-5th distal interphalangeal joints
What is the origin of fibularis tertius?
Distal shaft of fibula
Interosseous membrane
What is the insertion of fibularis tertius?
5th metatarsal
What is the action of fibularis tertius?
Dorsiflexes foot at ankle
Everts foot
What is the origin of fibularis longus?
Head of fibula
What is the insertion of fibularis longus?
Medial cuneiform
1st metatarsal
What is the action of fibularis longus?
Plantar flexes foot at ankle
Everts foot
What is the origin of fibularis brevis?
Distal shaft of fibula
What is the insertion of fibularis brevis?
5th metatarsal
What is the action of fibularis brevis?
Plantar flexes foot at ankle
Everts foot
What is the origin of trapezius?
Occipital bone
Spinous processes of C7 - T12
What is the insertion of trapezius?
Lateral 1/3 of clavicle
Spine of scapula
Acromion process
What is the action of trapezius?
Elevates scapula
Depresses scapula
Rotates scapula
Adducts scapula
What is the origin of latissimus dorsi?
Spinous processes of T7 - T12
Ribs 9 - 12
Iliac crest
What is the insertion of latissimus dorsi?
Intertubercular groove (sulcus)
What is the action of latissimus dorsi?
Extends arm at shoulder
Adducts arm
Rotates arm medially
What is the origin of levator scapulae?
Transverse processes of C1 - C4
What is the insertion of levator scapulae?
Vertebral border of the scapula
What is the action of levator scapulae?
Elevates scapula
Downwardly rotates scapula
What is the origin of rhomboid major?
Spinous processes of T2 - T5
What is the insertion of rhomboid major?
Vertebral border of the scapula
What is the action of rhomboid major?
Adducts scapula
Downwardly rotates scapula
What is the origin of rhomboid minor?
Spinous processes of C7 - T1
What is the insertion of rhomboid minor?
Vertebral border of the scapula
What is the action of rhomboid minor?
Adducts scapula
Downwardly rotates scapula
What is the origin of supraspinatus?
Supraspinous fossa
What is the insertion of supraspinatus?
Greater tubercle
What is the action of supraspinatus?
Abducts arm
What is the origin of infraspinatus?
Infraspinous fossa
What is the insertion of infraspinatus?
Greater tubercle
What is the action of infraspinatus?
Rotates arm laterally
What is the origin of teres major?
Inferior angle of scapula
What is the insertion of teres major?
Lesser tubercle
What is the action of teres major?
Adducts arm
Extends arm at shoulder
Rotates arm medially
What is the origin of teres minor?
Lateral border of scapula
What is the insertion of teres minor?
Greater tubercle
What is the action of teres minor?
Rotates arm laterally
What is the origin of subscapularis?
Subscapular fossa
What is the insertion of subscapularis?
Lesser tubercle
What is the action of subscapularis?
Rotates arm medially
What is the origin of splenius capitis?
Spinous processes of C6 - T7
What is the insertion of splenius capitis?
Mastoid process
Occipital bone
What is the action of splenius capitis?
Extends vertebral column
What is the origin of semispinalis capitis?
Transverse process of C7 - T12
What is the insertion of semispinalis capitis?
Occipital bone
What is the action of semispinalis capitis?
Extends vertebral column
What is the origin of iliocostalis?
Iliac crest
Ribs 3-12
What is the insertion of iliocostalis?
Inferior border of ribs
Transverse processes of C4 - C6
What is the action of iliocostalis?
Extends vertebral column
What is the origin of longissimus?
Transverse processes of C4 - L5
What is the insertion of longissimus?
Mastoid process
What is the action of longissimus?
Extends vertebral column
What is the origin of spinalis?
Spinous processes of T7 - L3
What is the insertion of spinalis?
Spinous processes of C4 - T6
What is the action of spinalis?
Extends vertebral column
What is the origin of the long head of triceps brachii?
Infraglenoid tubercle
What is the insertion of the long head of triceps brachii?
Olecranon process of ulna
What is the action of the long head of triceps brachii?
Extends forearm at elbow
What is the origin of the lateral head of triceps brachii?
Posterior surface of shaft of humerus
What is the insertion of the lateral head of triceps brachii?
Olecranon process of ulna
What is the action of the lateral head of triceps brachii?
Extends the forearm at elbow
What is the origin of the medial head of triceps brachii?
Posterior surface of shaft of humerus
What is the insertion of the medial head of triceps brachii?
Olecranon process of ulna
What is the action of the medial head of triceps brachii?
Extends forearm at elbow
What is the origin of flexor carpi radialis?
Medial epicondyle of humerus
What is the insertion of flexor carpi radialis?
2nd and 3rd metacarpals
What is the action of flexor carpi ulnaris?
Flexes hand at wrist
Abducts hand
What is the origin of palmaris longus?
Medial epicondyle of humerus
What is the insertion of palmaris longus?
Palmar aponeurosis
What is the action of palmaris longus?
Flexes hand at wrist
What is the origin of flexor carpi ulnaris?
Medial epicondyle of humerus
Olecranon process of ulna
Shaft of ulna
What is the insertion of flexor carpi ulnaris?
Pisiform
Hamate
5th metacarpal
What is the action of flexor carpi ulnaris?
Flexes hand at wrist
Adducts hand
What is the origin of flexor digitorum superficialis?
Medial epicondyle of humerus
Coronoid process of ulna
Shaft of radius
What is the insertion of flexor digitorum superficialis?
Middle phalanges of 2nd - 5th digits
What is the action of flexor digitorum superficialis?
Flexes hand at wrist
Flexes proximal interphalangeal joints
What is the origin of flexor digitorum profundus?
Ulna
Interosseous membrane
What is the insertion of flexor digitorum profundus?
Distal phalanges of 2nd - 5th digits
What is the action of flexor digitorum profundus?
Flexes distal interphalangeal joints
What is the origin of flexor pollicis longus?
Anterior radius
Interosseous membrane
What is the insertion of flexor pollicis longus?
Distal phalanx of pollex
What is the action of flexor pollicis longus?
Flexes 1st interphalangeal joint
What is the origin of pronator quadratus?
Distal and anterior ulna
What is the insertion of pronator quadratus?
Distal and anterior radius
What is the action of pronator quadratus?
Pronates forearm
What is the origin of pronator teres?
Medial epicondyle of humerus
What is the insertion of pronator teres?
Lateral radius
What is the action of pronator teres?
Pronates forearm
What is the origin of abductor pollicis brevis?
Scaphoid
Trapezium
Flexor retinaculum
What is the insertion of abductor pollicis brevis?
Proximal phalanx of thumb
What is the action of abductor pollicis brevis?
Abducts thumb
What is the origin of opponens pollicis?
Trapezium
Flexor retinaculum
What is the insertion of opponens pollicis?
1st metacarpal
What is the action of opponens pollicis?
Opposition
What is the origin of flexor pollicis brevis?
Trapezium
Flexor retinaculum
What is the insertion of flexor pollicis brevis?
Proximal phalanx of pollex (thumb)
What is the action of flexor pollicis brevis?
Flexes thumb
What is the origin of adductor pollicis?
Capitate
Bases of 2nd - 4th metacarpals
What is the insertion of adductor pollicis?
Proximal phalanx of pollex (thumb)
What is the action of adductor pollicis?
Adducts thumb
Opposition
What is the origin of gluteus maximus?
Posterior surface of ala of ilium
Sacrum
Coccyx
What is the insertion of gluteus maximus?
Iliotibial tract
Gluteal tuberosity
What is the action of gluteus maximus?
Extends thigh at hip
Rotates thigh laterally
Abducts thigh
What is the origin of gluteus medius?
Lateral surface of ilium
What is the insertion of gluteus medius?
Greater trochanter
What is the action of gluteus medius?
Abducts thigh
Rotates thigh medially
What is the origin of gluteus minimis?
Lateral surface of ilium
What is the insertion of gluteus minimis?
Greater trochanter
What is the action of gluteus minimis?
Abducts thigh
Rotates thigh medially
What is the origin of piriformis?
Lateral surface of sacrum
What is the insertion of piriformis?
Greater trochanter
What is the action of piriformis?
Rotates thigh laterally when hip is extended
What is the origin of quadratus femoris?
Ischial tuberosity
What is the insertion of quadratus femoris?
Intertrochanteric crest
What is the action of quadratus femoris?
Rotates thigh laterally
What is the origin of the long head of biceps femoris?
Ischial tuberosity
Linea aspera
What is the insertion of the long head of biceps femoris?
Head of fibula
Lateral condyle of tibia
What is the action of the long head of biceps femoris?
Extends thigh at hip
Flexes leg at knee
Rotates leg laterally
What is the origin of the short head of biceps femoris?
Linea aspera
What is the insertion of the short head of biceps femoris?
Head of fibula
Lateral condyle of tibia
What is the action of the short head of biceps femoris?
Flexes leg at knee
Rotates leg laterally
What is the origin of semitendinosus?
Ischial tuberosity
What is the insertion of semitendinosus?
Medial surface of proximal shaft of tibia
What is the action of semitendinosus?
Extends thigh at hip
Flexes leg at knee
Rotates leg medially
What is the origin of semimembranosus?
Ischial tuberosity
What is the insertion of semimembranosus?
Medial condyle of tibia
What is the action of semimembranosus?
Extends thigh at hip
Flexes leg at knee
Rotates leg medially
What is the origin of gastrocnemius?
Lateral condyle of femur
Medial condyle of femur
What is the insertion of gastrocnemius?
Calcaneus
What is the action of gastrocnemius?
Plantar flexes foot at ankle
What is the origin of soleus?
Proximal tibia
Proximal fibula
Interosseous membrane
What is the insertion of soleus?
Calcaneus
What is the action of soleus?
Plantar flexes foot at ankle
What is the origin of tibialis posterior?
Proximal tibia
Proximal fibula
Interosseous membrane
What is the insertion of tibialis posterior?
Navicular
2nd - 4th metatarsals
What is the action of tibialis posterior?
Plantar flexes foot at ankle
Inverts foot
What is the origin of flexor digitorum longus?
Posterior shaft of tibia
What is the insertion of flexor digitorum longus?
Distal phalanges of 2nd - 5th digits (toes)
What is the action of flexor digitorum longus?
Plantar flexes foot at ankle
Inverts foot
Flexes 2nd - 5th distal interphalangeal joints
What is the origin of flexor hallucis longus?
Middle shaft of fibula
Interosseous membrane
What is the insertion of flexor hallucis longus?
Distal phalanx of hallux (big toe)
What is the action of flexor hallucis longus?
Plantar flexes foot at ankle
Inverts foot
Flexes big toe