Upper Extremity Myology Flashcards
Pectoralis Major M. (Provide Action Innervation and Blood Supply)
Action: Adduct & medially rotate humerus, Clav head: flex humerus, Sternocostal head: extend flexed humerus
Innervation: Medial/Lateral pectoral N.
Blood Supply: Pectoral branch of the thoracoacromial trunk
Pectoralis Minor M.
Action: stabilize scapula by depression/protraction
Innervation: Medial pectoral N.
Blood Supply: Pectoral A. branch of the thoracoacromial trunk
Subclavius M.
Action: Stabilize/depress clavicle
Innervation: Subclavian N.
Blood Supply: Clavicular A. branch of thoracoacromial trunk
Serratus Anterior M.
Action: Protract Scapula, stabilize against thoracic wall, rotate glenoid cav sup.
Innervation: Long thoracic N.
Blood Supply: Lateral thoracic A.
Deltoid M.
Action: Clavicular: flex & medially rotate humerous Acromial: abduct humerus Spinal: extened & laterally rotate humerous
Innervation: Axillary N.
Blood Supply: Deltoid A. branch of thoracoacromial A.
Subscapularis M. (RC)
Action: Medially rotate, abduct humerous/ hold head in cavity
Innervation: Superior&Inferior subscapular N.
Blood Supply: Subscapular A.
Supraspinatus M. (RC)
Action: Abduct and hold humerus head in glenoid cavity
Innervation: Suprascapular N.
Blood Supply: Suprascapular A.
Infraspinatus M. (RC)
Action: Laterally rotate/hold humerus in glen cavity
Innervation: Suprascapular N.
Blood Supply: Suprascapular A.
Teres Minor M. (RC)
Action: Laterally rotate/hold humerus in glenoid cavity
Innervation: Axillary N.
Blood Supply: Circumflex Scapular A.
Teres Major M. (NOT RC)
Action: Adduct & medially rotate humerus
Innervation: Inferior subscapular N.
Blood Supply: Circumflex Scapular A.
Biceps Brachii M.
Action: flex humerus, flex supine forearm, supinate forearm, resist shoulder dislocation (short head)
Innervation: Musculocutaneous N.
Blood Supply: Brachial A.
Coracobrachialis M.
Action: Flex & adduct humerous
Innervation: Musculocutaneous N.
Blood Supply: Brachial A.
Brachialis M.
Action: Flex forearm
Innervation: Musculocutaneous N.
Blood Supply: Brachial A., ruccurent Radial A.
Triceps Brachii M.
Action: Extend forearm, extend/adduct humerus Long head: resist shoulder dislocation
Innervation: Radial N.
Blood Supply: Branches of deep Brachial A.
Anconeus M.
Action: Extend forearm, stabilizes elbow joint, abducts the ulna during pronation
Innervation: Radial N.
Blood Supply: Middle collateral branch of deep brachial A.
Pronator Teres M. (deep head and superficial head)
Action: Pronate & flex forearm
Innervation: Median N.
Blood Supply: Ulnar A.
Flexor Carpi Radialis M.
Action: Flex and abduct hand at wrist
Innervation: Median N.
Blood Supply: Ulnar A.
Palmaris Longus M.
Action: Flex hand at wrist, tense palmar aponeurosis
Innervation: Median N.
Blood Supply: Ulnar A.
Flexor Capri Ulnaris M.
Action: flex and adduct hand at wrist
Innervation: Ulnar N.
Blood Supply: Ulnar A.
Flexor Digitorum Profundus M.
Action: Flex: hand at wrist, metacarpophalangeal, and proximal/distal interphalangeal joints
Innervation: Lateral: Anterior Interosseous N Medial: Ulnar N.
Blood Supply: Anterior interosseous A.
Flexor Pollicis Longus M.
Action: Flex: hand at wrist, at 1st carpometacarpal, metacarpophalangeal, interphalangeal joint (THUMB)
Innervation: Anterior Interosseous N.
Blood Supply: Anterior Interossesous A.
Pronator Quadratus M.
Action: Pronate forearm
Innervation: Anterior Interosseous N.
Blood Supply: Anterior interosseous A.
Brachioradialis M.
Action: Flex forearm
Innervation: Radian N
Bloody Supply: Radial A.
Extensor Carpi Radialis Longus M.
Action: extend and abduct hand at wrist
Innervation: Radial N.
Bloody Supply: Radial A.
Extensor Carpi Radialis Brevis M.
Action: Extend/abduct hand at wrist
Innervation: Deep radial N.
Bloody Supply: Radial A.
Extensor Digitorum M.
Action: Extend hand at wrist, metacarpophalangeal, proximal and distal interphalangeal joints
Innervation: Posterior Interosseous N.
Bloody Supply: Posterior Interosseous A.
Extensor Digiti Minimi M.
Action: Extend metacarpophalangeal, proximal/distal interphalangeal joints
Innervation: Posterior interosseous N.
Bloody Supply: Interosseous A.
Extensor Carpi Ulnaris M.
Action: Entend/adduct hand at wrist (ulnar flexion)
Innervation: Posterior Interosseous N.
Bloody Supply: Ulnar A.
Supinator M.
Action: Suponates forearm
Innervation: Deep Radial N.
Bloody Supply: Interosseous A.
Extensor Indicis M.
Action: Extend hand at wrist/extend index finger
Innervation: Posterior Interosseous N.
Bloody Supply: Posterior Interosseous A.
Abductor Pollicis Longus M.
Action: Abduct hand/pollex (thumb)
Innervation: Posterior Interosseous N.
Bloody Supply: Posterior interosseous A.
Extensor Pollicis Brevis M.
Action: Abduct hand at wrist/extend pollex (thumb)
Innervation: Posterior Interosseous N.
Bloody Supply: Posterior Interosseous A.
Extensor Pollicis Longus M.
Action: Abduct hand at wrist/extend pollex (thumb)
Innervation: Posterior Interosseous N.
Bloody Supply: Posterior interosseous A.
Abductor Pollicis Brevis M.
Action: Abduct pollex
Innervation: Reccurent branch of median N.
Bloody Supply: Superficial palmar arch , branch of the radial A.
Flexor Pollicis Brevis M.
Action: Flex Pollex
Innervation: Superficial head: recurrent branch of median N. Deep head: deep ulnar N.
Bloody Supply: superficial palmar arch, branch of the radial A.
Opponens Pollicis M.
Action: Oppose pollex
Innervation: Reccurent branch of median N.
Bloody Supply: superficial palmar arch branch of the radial A.
Adductor Pollicis M. (oblique head(small) and transverse head)
Action: Adduct pollex
Innervation: Deep ulnar N.
Bloody Supply: Deep palmar arterial arch
Abductor digiti minimi M.
Action: Abduct 5th digit
Innervation: Deep ulnar N.
Bloody Supply: Ulnar A.
Flexor Digiti Minimi M.
Action: Flex proximal phalanx of 5th digit
Innervation: Deep ulnar N.
Bloody Supply: Ulnar A.
Opponens Digiti Minimi M.
Action: Oppose 5th digit
Innervation: Deep ulnar N.
Bloody Supply: Ulnar A.
1st, 2nd, 3rd, and 4th Lumbrical M.
Action: Flex metacarpophalangeal joint, extend proximal/distal interphalangeal joints
Innervation: 1st/2nd Median N., 3rd/4th Deep Ulnar N.
Bloody Supply: Dorsal and palmar metacarpal A.
Dorsal Interossei MM. (1-4)
Action: Abduct 2nd digit laterally ,3rd both,4th medially, flex metacarpophalangeal joint (2-4), Extend proximal and distal interphalangeal joints (2-4)
Innervation: Deep Ulnar
Bloody Supply: Dorsal and palmar metcarpal A.
Palmar Interossei MM. (1-3)
Action: Adduct 2nd digit medially, 4th and 5th laterally, flext metacarpophalangeal joint (2,4,5), Extend proximal/distal interphalangeal joints (2,4,5)
Innervation: Deep Ulnar N.
Bloody Supply: Palmar metacarpal A.
