Upper Extremity (Actions, Innervation and Arterial Supply) Flashcards
Abductor Pollicis Brevis
A: Abducts the thumb at the carpometacarpal and metacarpophalangeal joints
A2: Assists in opposition and extension of thumb
I: Recurrent branch of median nerve (C8 and T1)
Ar: Superficial Palmar branch of radial artery
Flexor Pollicis Brevis
A: Flexes thumb at the matcarpophalangeal joint
A2: Assists in opposition and adduction of the thumb
I1: Superficial head - Recurrent branch of the median nerve (C8, T1)
I2: Deep head - Deep branch of the ulnar nerve (C8, T1)
Ar: Superficial Palmar Branch of the radial artery
Abductor Pollicis Longus
A1: Abducts the thumb at the carpometacarpal joint
A2: Assists in extension and radial deviation of hand
I: Posterior interosseous nerve (C7, C8)
Ar: Posterior interosseous artery
Adductor Pollicis
A: Adducts the thumb at the carpometacarpal joint
A2: Assists in flexion and opposition of thumb
I: Deep branch of the ulnar nerve (C8, T1)
Ar: Deep palmar arch
Anconeus
A1: Extends forearm at the elbow
A2: Abducts the ulna during pronation
A3: Provides support for the elbow joint capsule
I: Radial nerve (C7, C8)
Ar: Deep brachial artery
Biceps Brachii
A1: Flexion of elbow joint
A2: Supination of the forearm
I: Musculocutaneous nerve (C5, C6)
Ar: Branches of the brachial artery
Brachialis
A: Primary flexor of the elbow joint
I: Musculocutanous nerve (C5, C6)
Ar: Branches of the brachial artery, radial recurrent artery, and branches from the ulnar collateral arteries
Brachioradialis
A: Flexion of the forearm
I: Radial nerve (C5, C6)
Ar: Radial recurrent artery
Coracobrachialis
A: Flexion and adduction of the arm at the shoulder joint
I: Musculocutaneous nerve (C5, C6)
Ar: Branches of the brachial artery
Deltoid
A1: Anterior fibers - Flexion, medial rotation of the humerus
A2: Middle fibers - Abduction of the humerus
A3: Posterior fibers - Extension, lateral rotation of the humerus
I: Axillary Nerve (C5, C6)
Ar: Thoracoacromial artery
Ar 2: Circumflex humeral arteries
Ar 3: Profunda Brachii artery
Extensor Carpi Radialis Brevis
A: Extends the wrist and abducts the hand at the wrist
I: Deep branch of the radial nerve (C7, C8)
Ar: Radial artery
Extensor Carpi Radialis Longus
A: Extends the wrist joint and abducts the hand at the wrist joint
I: Radial nerve (C6, C7)
Ar: Radial recurrent artery and radial artery
Extensor Carpi Ulnaris
A: Extends the wrist joint and adducts the hand at the wrist joint
I: Posterior interosseous nerve (C7, C8)
Ar: Ulnar artery
Extensor Digitorum
A: Extends the middle four digits at the metacarpophalangeal and interphalangeal joints
I: Posterior interosseous nerve (C7, C8)
Ar: Radial recurrent artery
Extensor Digiti Minimi
A: Extends the little finger at the metacarpophalangeal and interphalangeal joints
I: Posterior interosseous nerve (C7, C8)
Ar: Radial recurrent artery and posterior interosseous artery
Extensor Indicis
A: Extends the index finger at the metacarpophalangeal and interphalangeal joints.
A2: Assists in wrist extension
I: Posterior interosseous nerve (C7, C8)
Ar: Posterior interosseous artery and perforating branches of the anterior interosseous artery
Flexor Carpi Radialis
A: Flexion of the wrist joint and abduction of the hand at the wrist joint
I: Median nerve (C6, C7)
Ar: Anterior or posterior ulnar recurrent artery and the branches of the radial artery
Flexor Carpi Ulnaris
A: Flexion of the wrist joint and adduction of the hand at the wrist joint
I: Ulnar nerve (C8, T1)
Ar: Posterior ulnar recurrent artery and ulnar artery
Flexor Digiti Minimi Brevis
A: Flexes the little finger at the metacarpophalangeal joint
I: Deep branch of the ulnar nerve (C8, T1)
Ar: Deep palmar arch
Flexor Digitorum Profundus
A: Flexion of the distal and proximal interphalangeal joints of the middle digits (2-5)
A2: Flexion of the metacarpophalangeal joints
I1: Lateral half - Anterior interosseous nerve (C8, T1)
I2: Medial half - Deep branch of the ulnar nerve (C8, T1)
Ar: Anterior interosseous artery
Flexor Digitorum Superficialis
A: Flexion of the middle phalanges at the proximal interphalangeal joints of fingers 2-5
A2: Assists in flexion of the metacarpophalangeal and wrist joints
I: Median nerve (C7, C8, T1)
Ar: Anterior Interosseous artery
Flexor Pollicis Longus
A: Flexion of the interphalangeal joint of the thumb
A2: Assists in flexion of the metacarpophalangeal joint of the thumb
I: Anterior interosseous nerve (C8, T1)
Ar: Anterior interosseous artery
Infraspinatus
A: Lateral rotation of the humerus at the shoulder joint and stabilizes the glenohumeral/Shoulder joint
I: Suprascapular nerve (C5, C6)
Ar: Suprascapular and circumflex scapular arteries
Levator Scapulae
A: Elevates and Downwardly rotates the scapula
I: Dorsal scapular nerve (C5) and branches from cervical spinal nerves C3 and C4
Ar: Transverse cervical artery and Ascending cervical artery
Latissimus Dorsi
A: Extension, adduction, and medial rotation of the humerus
I: Thoracodorsal nerve (C6, C7, C8)
Ar: Thoracodorsal artery
Lumbricals
A: Flex the metacarpophalangeal joints
A2: Extend the proximal and distal interphalangeal joints
I1: Lateral two lumbricals - Median nerve
I2: Medial two lumbricals - Deep branch of the ulnar nerve
Ar: Superficial and Deep palmar arches
Opponens Digiti Minimi
A: Opposition of the 5th digit
I: Deep branch of the ulnar nerve (C8, T1)
Ar: Deep palmar arch
Opponens Pollicis
A: Opposition of the thumb
I: Recurrent branch of the median nerve (C8, T1)
Ar: Superficial palmar arch
Palmaris Longus
A: Weak flexion of the wrist
I: Median nerve (C7, C8)
Ar: Ulnar artery
Pectoralis Major
A: Adduction, medial rotation, and flexion of the humerus
I: Lateral and medial pectoral nerves (C5-T1)
Ar: Pectoral branch of the thoracoacromial artery, and perforating branches of the internal thoracic artery
Pectoralis Minor
A: Depression and protraction of the scapula
I: Medial Pectoral nerve (C8, T1)
Ar: Pectoral branch of the thoracoacromial artery
Pronator Quadratus
A: Pronation of the forearm
I: Anterior interosseous nerve
Ar: Anterior interosseous artery
Pronator Teres
A: Pronation of the forearm, weak flexion of elbow
I: Median nerve (C6, C7)
Ar: Ulnar Artery and anterior recurrent ulnar artery
Rhomboid Major and minor
A: Retraction of the scapula and rotation of the scapula to downwardly rotate the glenoid cavity
I: Dorsal Scapular nerve (C4, C5)
Ar: Dorsal Scapular artery
Serratus Anterior
A: Protraction of the scapula, upward rotation of the scapula, and stabilization of the scapula against the rib cage
I: Long thoracic nerve (C5, C6, C7)
Ar: Thoracodorsal artery, lateral thoracic artery, and superior thoracic artery
Subclavius
A: Depresses and stabilizes the clavicle
I: Nerve to the subclavius (C5, C6)
Ar: Clavicular branch of the thoracoacromial artery
Subscapularis
A: Medial rotation of the humerus, stabilization of the glenohumeral joint
I: Upper and lower subscapular nerves (C5, C6)
Ar: Subscapular artery
Supinator
A: Supination of the forearm
I: Deep branch of the radial nerve (C5, C6)
Ar: Recurrent interosseous artery
Supraspinatus
A: Initiates abduction of the arm at the shoulder joint
I: Suprascapular nerve (C5, C6)
Ar: Suprascapular artery
Teres Major
A: Extension, Adduction, and medial rotation of the humerus
I: Lower subscapular nerve (C6, C7)
Ar: Circumflex scapular artery
Teres Minor
A: Lateral rotation of the humerus, stabilizes the glenohumeral joint
I: Axillary nerve (C5, C6)
Ar: Circumflex scapular artery
Trapezius
A: Elevation, depression, retraction, and rotation of the scapula
I: Accessory nerve (CN 11) and C3-4
Ar: Transverse cervical artery and occipital artery
Triceps Brachii
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