Moore action Flashcards
Trapezius action
Descending head elevates scapula, ascending part depresses the scapula, middle part (or all 3) retract scapula, descending and ascending rotate glenoid cavity superiorly
Levator scapulae action
Medially elevates scapula and flexes cervical spine
Rhomboid minor action
Retracts, depresses, stabilizes and internally rotates scapula
Rhomboid major action
Retracts, depresses, stabilizes, and internally rotates the scapula
Latissimus dorsi action
Extension, internal rotation, and adduction of humerus
Serratus anterior action
Pulls the scapula against thoracic cage
Teres major action
Internal rotation, adduction, and extension of the arm
Subscapularis action
Internal rotation and holds humeral head in glenoid cavity SITS muscle
Supraspinatus action
Initiates abduction (first 15⁰) SITS muscle
Infraspinatus action
External rotation of humerus SITS muscle
Teres minor action
External rotation of humerus, SITS muscle
Pectoralis major action
Adduction, internal rotation of humerus, pulls scapula forward. Clavicular head alone flexes humerus, sternal head alone extended from flexed
Pectoralis minor action
Pulls scapula inferior and anterior to ribs cage
Subclavius action
Depresses and stabilizes clavicle
Coracobrachialis action
Aids in adduction and flexion, prevents dislocation of humerus from glenoid
Biceps brachii action
Flexes forearm when supinated, supinator of forearm, short head also resist dislocation of humerus
Brachialis action
Flexes forearm in all positions
Triceps brachii action
Main extensor of forearm, medial head is workhorse, long head also resists dislocation of humerus
Anconeus action
Aids in forearm extension and stabilizes elbow
Deltoid action
Clavicular head: flexes and internally rotates humerus, acromion head: abducts humerus; spinal head: extends and externally rotates humerus
Pronator teres action
Weak pronator and flexor of forearm
Flexor carpi radialis action
Flexes and abducts hand at wrist
Palmaris longus action
Flexes hand at wrist Absent in 10-15% of people with no clinical deficits
Flexor carpi ulnaris action
Flexes and adducts hand at wrist
Flexor digitorum superficialis action
Flexes digits at proximal interphalangeal joint and more strongly at metacarpalphalangeal joint
Flexor digitorum profundus action
Flex digits at the distal interphalangeal joints
Flexor pollicus longus action
Flexes thumb at interphalangeal join, MCP, carpometacarpal joint
Pronator quadratus action
Pronates the forearm, deep fibers hold ulna and radius together
Brachioradialis action
Flexes the forearm at the elbow
Extensor carpi radialis longus action
Extends and abducts the hand at wrist, active during fist clenching
Extensor carpi radialis brevis action
Flexes and abducts hand at wrist
Extensor digitorum action
Extends the digits at PIP, mostly at MCP
Extensor digiti minimi action
Extends digit V at PIP, mostly at MCP
Extensor carpi ulnaris action
Extends and adducts the hand at the wrist, active during fist clenching
Supinator action
Supinates the forearm
Extensor indicis action
Independent extension of digit II and helps in hand extension at wrist
Abductor pollicis longus action
Abducts thumb and extends at MCP
Extensor pollicis brevis action
Extends thumb at MCP, CMC
Extensor pollicis longus action
Extends thumb at IP, MCP, CMC joint
Flexor pollicis brevis action
Superficial head: Flexes thumb at MCP; Deep head: aids in adduction the thumb
Opponens pollicis action
Bring the thumb into opposition
Abductor pollicis brevis action
Abducts the thumb, helps oppose it
Adductor pollicis action
Adducts the thumb into the lateral side of palm
Flexor digiti minimi action
Flexes the proximal phalanx of the 5th digit
Opponens digiti minimi action
Brings 5th digit anterior into opposition with thumb
Abductor digiti minimi action
Abducts 5th digit
Palmaris brevis action
Wrinkles the skin of the palm and deepens the hollow of the palm
1st and 2nd lumbricals action
Flexes at MCP and extends at PIP
3rd and 4th lumbricals action
Flexes at MCP and extends PIP
Palmar interossei 1st-3rd action
Adducts fingers and helps lumbricals
Dorsal interossei 1st-4th action
Abducts fingers and helps lumbricals
