Extremities Practical #1 Flashcards
flexor carpi radialis
opponens digiti minimi
brachial artery
Flexor carpi radialis
origin- arises from the medial epicondyle of the humerus and the antebrachial fascia
insertion- inserts into the BASE of the 2nd metacarpal bone and sends a slip to the base of the 3rd metacarpal bone
action- flexes the hand at the wrist joing and aids in abduction
innervation- median nerve c6 and c7
* the radial artery pulse may be palpated just lateral to the tendon of this muscle
- Clavicle
- Suprascapular notch
- Superior angle
- Supraspinous fossa
- Spine
- Infraspinous fossa
- Medial epicondyle
- Trochdlea
- Olecranon fossa
10 deltoid tuberosity
- Head of humerus
biceps brachii long head
basilic vein
axillary artery
flexor carpi ulnaris
flexor digitorum profundus
flexor digitorum superficialis
median nerve
axillary nerve from brachial plexus
flexor digiti minimi brevis
flexor digitorum superficialis
digital artery and nerve
extensor digitorum
circumflex scapular artery
flexor carpi radialis
extensor indicis
brachial plexus lateral cord
flexor carpi ulnaris
superficial palmar arch
flexor carpi radialis
flexor pollicis longus
- Pronator teres
- Pronator quadratus
origin-
pronator teres has 2 heads- 1 humeral heads arises above the medial epicondyle from the common flexor tendon, the intermusclular septum and antebrachial fascia. 2 ulnar head arises from the medial side of the coronoid process of the ulna.
quadratus arises from the medial aspect of the anterior surface of the distal 1/4 of the ulna
insertion-
pronator teres inserts midway along the lateral surface of the radius
quadratus inserts into the distal 4th of the lateral border and anterior surface of the shaft of the radius
Action-
pronator teres rotates the radius on the uln and helps flex the forearm at the elbow
quadratus pronates the hand- and is assited by the pronator teres when additional power is required
innervation-
both are innervated by the median nerve- pronator teres c6 c7 and quadratus c8 t1
* pronator teres is quick and powerful pronation- quadratud is deep
flexor digitorum superficialis
flexor digitorum profundus
flexor digitorum superficialis
pec major
extensor hood
palmar aponeurosis
anterior interosious artery
extensor pollicis brevis
axillary nerve
extensor retinaculum
musculocutaneous nerve
extensor carpi radialis brevis
pectoralis major muscle
biceps brachii
flexor carpi radialis
median nerve in forearm
extensor digiti minimi
- Dorsal interosseous muscles
origin- the 4 dorsal interosseous muscles are bipennate. 2 heads from adjacent sides of the metacarpal bones
insertion- inserts into the base of the proximal phalanx and into the aponeurosis that forms the extensor expansion of digits 2-4
action- abducts the fingers from an imaginary line through the middle finger. Flex the fingers at the MCP joint and extends the 2 distal phalanges at the interphalangeal joints
innervation- deep palmar branch of the ulnar nerve c8 and t1
* the 1st dorsal int is the largest- “pinch” muscle- also used with the adducgtor pollicis for precision grip- they are not associated with the thumb or little finger
median nerve
pectoralis minor
anterior interosseous nerve and artery
- Acromion
- Greater tubercle
- Lesser tubercle
- Intertubercular sulcus
- Condyles- medial and lateral
- Capitulum
- Coronoid fossa
- Glenoid cavity of scapula
- Inferior angle
10 subscapular fossa
- Coracoid process
brachial artery
brachial plexus
medial cutaneous nerve
interosseous membrane
bicipital aponeurosis
extensor pollicis longus
biceps brachii
Palmaris longus
origin- arises from the medial epicondyle of the humerus by the common flexor tendon and the antebrachial fascia.
Insertion- inserts into the anterior aspect of the distal flexor retinaculum and into the palmar aponeurosis
action- flexes the hand at the wrist and tightens the palmar aponeurosis
innervation- median nerve c6 c7
* absent in 10 percent of pop. Used for claws.
abductor pollicis brevis
median nerve medial root
- Thoracacromial artery
- Axillary artery
- Posterior humeral circumflex artery
- Brachial artery
- Deep artery of the arm
- Radial collateral artery
- Radial recurrent artery
- Radial artery
- Ulnar artery
- Common interosseous artery
- Superior ulnar collateral artery
- Circumflex scapular artery
- Subscapular artery
extensor pollicis longus
brachialis
circumflex scapular artery
abductor pollicis longus
extensor digitorum tendons
axillary nerve in quadrangular space
brachioradialis
axillary nerve
musculocutaneous nerve
Flexor pollicis longus
origin- anterior aspect of the radius and adjacent to interosseous membrane
insertion- base of the distal phalanx of the thumb
action- flexion of the distal phalanx of the thumb. Can also flex the proximal phalanx because tendon croses the joint.
Innervation- anterior interosseous- branch of med.nerve c7, c8 and t1
* the tendon of this muscle belly crosses the carpal tunnel on the radial side of the digital flexor tendons and passes to the distal phalanx of the thumb- it has its own synovial sheath
palmar interoseous muscle
lumbrical muscle
medial cutaneous nerve in the arm
cephalis vein
biceps brachii
- Musculocutaneous nerve c5, c6, c7
- Axillary nerve c5 c6
- Radial nerve c5, c6, c7, c8 and t1
- Median nerve c5, c6, c7, c8 and t1
- Ulnar nerve c7 c8 and t1
- Thoracodorsal- c6, c7, c8
- Long thoracic nerve c5, c6, c7
8 dorsal scapular nerve c5
- Palmar interosseous muscles- intrinsic muscle
origin- 3 palmar interossei arise from the palmar surfaces of the metacarpal bones of digits 2. 4. And 5
insertion- tendons of the palmar interossei insert into the extensor expansions of the digits and bases of the proximal phalanges of digits 2,4, and 5
actions- they adduct the fingers at the MC joint- moving them toward the mid axis. They also flex the proximal phalanx at the MC joint and aids in extension of the 2 distal phalanges at the interphalangeal joints.
Innervation- deep branch of the ulnar nerve c8 and t1
flexor digitorum superficialis
anterior interosseous nerve
median nerve recurrent
Flexor digitorum profundus
origin- arises from the proximal 3/4 of the medial and anterior aspects of the ulna and from the interosseous membrane.
Insertion- four tendons attach to the bases of the distal phalanges of the medial 4 digits
action- flexion of the DIP joints. Also flexes at the PIP and the MC joints and flexes the wrist.
Innervation- proximal to the wrist the muscle is innervated by two nerves. The medial part is innervated by the ulnar nerve c8 and t1. The lateral part is innervated by the anterior interosseous nerve AIN- branch of the median nerve v8 and t1
* the tendons of the fdp cross the carpal tunnel and then the palm of the hand. The 4 tensons pass through the slits of the superficialis tendons then attach to the distal phalanges.
brachial plexus posterior cord
palmaris longus
median nerve
beceps brachii tendon
oponens pollicis
median nerve
extensor carpi radialis longus
brachial plexus medial cord
extensor digiti minimi
brachioradialis
flexor pollicis brevis
flexor carpi ulnaris
common interosseous artery
