UE Muscle Action Flashcards
Trapezius (middle fibers)
Elevate scapula
Upward rotate scapula
Trapezius (upper fibers)
Extend head
Extend cervical vertebral column
Trapezius (lower fibers)
Depress scapula
Downward rotate scapula
Latissimus dorsi
Extend arm Medially rotate arm Depress scapula Retract scapula Downward rotate scapula
Rhomboideus major
Retract scapula
Downward rotate scapula
Elevate scapula
Rhomboideus minor
Retract scapula
Downward rotate scapula
Elevate scapula
Levator scapulae
Elevate scapula
Downward rotate scapula
Serratus anterior
Protract scapula
Assists in breathing
Prevents scapular winging
Teres major
Adduct arm
Extend arm
Medially rotate arm
Deltoid (clavicular head)
Abduct arm
Flex arm
Medially rotate arm
Deltoid (spinal head)
Abduct arm
Extend arm
Laterally rotate arm
Supraspinatus
Abduct arm
Support glenohumeral joint
Infraspinatus
Laterally rotate arm
Support glenohumeral joint
Teres minor
Laterally rotate arm Adduct arm (weak) Support glenohumeral joint
Subscapularis
Medially rotate arm
Support glenohumeral joint
Pectoralis major (clavicular head)
Adduct arm
Medially rotate arm
Help flex an extended arm
Pectoralis major (sternocostal head)
Adduct arm
Medially rotate rm
Help extend a flexed arm
Coracobrachialis
Flex arm
Assist in adduction
Biceps brachii
Flex arm
Flex forearm
Supinate forearm
Brachialis
Flex forearm
Triceps brachii long head
Extend forearm
Extend arm
Triceps brachii medial head
Extend forearm
Triceps brachii lateral head
Extend forearm
Pronator teres
Pronate forearm
Flex elbow
Flexor carpi radialis
Flex wrist Abduct hand (radial deviation) Flex elbow (weak)
Palmaris longus
Flex wrist Flex elbow (weak)
Flexor digitorum superficialis
Flex proximal interphalangeal joints Flex metacarpophalangeal joints Flex wrist Flex elbow (weak)
Pronator quadratus
Pronate forearm
Flexor pollicis longus
Flex interphalangeal joint of pollux
Flex metacarpophalangeal joint of pollux
Flex wrist
Flexor digitorum profundus
Flex distal interphalangeal joints
Flex proximal interphalangeal joints
Flex metacarpophalangeal joints
Flex wrist
Flexor carpi ulnaris
Flex wrist Adduct hand (ulnar deviation) Flex elbow (weak)
Aconeus
Assist in elbow extension
Brachioradialis
Elbow flexion
Extensor carpi radialis longus
Extend wrist Abduct wrist (radial deviation)
Extensor carpi radialis brevis
Extend wrist Abduct wrist (radial deviation)
Extensor digitorum
Extend fingers
Extend wrist
Extensor digit minimi
Extend digit 5
Extend wrist
Extensor carpi ulnaris
Extend wrist Adduct wrist (ulnar deviation)
Supinator
Supinate forearm
Extensor indicis
Extend digit 2
Extend wrist
Abductor pollicis longus
Abduct thumb
Extensor pollicis brevis
Extend thumb at metacarpophalangeal joint
Extensor pollicis longus
Extend thumb at metacarpophalangeal joint and interphalangeal joint
Abductor pollicis brevis
Abduct thumb
Assist in flexion of thumb
Flexor pollicis brevis
Flex thumb
Opponens pollicis
Opposition
Abductor digiti minimi
Abduct 5th digit
Flexor digiti minimi
Flex 5th digit metacarpophalangeal joint
Opponens digiti minimi
Opposition of 5th digit
Palmaris brevis
Wrinkles skin on ulnar side of palm
“Cupping” of hand
Lumbercals
Flex metacarpophalangeal joints
Extend proximal and distal interphalangeal joints
Dorsal interossei
Abduct digits 2, 3, 4
Assists in flexing digits 2,3,4
Palmar interossei
Adduct digits 2,4,5
Assist in flexing metacarpophalangeal joints of digits 2,4,5
Adductor pollicis
Addict thumb
Assist in opposition