BISC 1035: Human Anatomy - Upper Limb Musculature ACTIONS

This set of flashcards covers key muscles and their actions related to the upper limb, including muscles that attach to the shoulder girdle, those inserting on the humerus, arm muscles, forearm flexors and extensors, and hand muscles.

Upper Trapezius

elevates scapula, with Serratus Anterior upward rotation

Middle Trapezius

retracts scapula, with Serratus Anterior upward rotation

Lower Trapezius

depresses scapula, with Serratus Anterior upward rotation

Levator Scapulae

elevates scapula

Rhomboid Major

retract and downward rotation of scapula

Serratus Anterior

protracts and laterally rotates scapula

Pectoralis Minor

depresses scapula/elevates ribs

Pectoralis Major

flexion/adduction/medial rotation of humerus

Latissimus Dorsi

adduction/medial rotation of arm; extends shoulder

Deltoid

flexes/extends shoulder; abducts, medially/laterally rotates arm

Subscapularis

medially rotates the arm

Supraspinatus

abducts arm

Infraspinatus

laterally rotates arm

Teres Minor

laterally rotates/adducts arm

Teres Major

medially rotates/adducts arm

Coracobrachialis

flexes shoulder/adducts arm

Biceps Brachii

shoulder flexion/elbow flexion/forearm & hand supination

Brachialis

flexes elbow

Triceps Brachii

shoulder extension (long head)/elbow extension

Anconeus

extends elbow

Pronator Teres

pronates forearm and hand

Flexor Carpi Radialis

flexes wrist/abducts hand (radial deviation)

Palmaris Longus

flexes wrist/tenses palmar fascia

Flexor Carpi Ulnaris

flexes wrist/adducts hand (ulnar deviation)

Flexor Digitorum Superficialis

flexes wrist & digits 2-5 at interphalangeal joints

Flexor Pollicis Longus

flexes thumb

Flexor Digitorum Profundus

flexes wrist & digits 2-5

Pronator Quadratus

pronates forearm & hand

Brachioradialis

flexes elbow without action on wrist or hand

Extensor Carpi Radialis Longus

extends and abducts wrist (radial deviation)

Extensor Carpi Radialis Brevis

extends/abducts wrist (radial deviation)

Extensor Digitorum

extends wrist and digits 2-5

Extensor Digiti Minimi

extends 5th digit

Extensor Carpi Ulnaris

extends wrist/adducts (ulnar deviation)

Abductor Pollicis Longus

abducts thumb & wrist/extends thumb

Extensor Pollicis Brevis

abducts thumb & wrist/extends thumb

Extensor Pollicis Longus

extends thumb

Extensor Indicis

extends 2nd digit (forefinger) & wrist

Supinator

supinates forearm & hand

Abductor Pollicis Brevis

abducts thumb

Flexor Pollicis Brevis

flexes thumb

Opponens Pollicis

allows opposition of thumb

Adductor Pollicis

adducts thumb

Abductor Digiti Minimi

abducts 5th digit

Flexor Digiti Minimi Brevis

flexes 5th digit

Opponens Digiti Minimi

allows opposition of 5th digit

Lumbricals (1-4)

flex/extend interphalangeal joints of digits 2-5

Dorsal Interossei

abduct digits 2-4 (DAB)

Palmar Interossei

adduct digits 2, 4, and 5 (PAD)