Module 6 Muscles Flashcards
Brachialis - innervation
musculocutaneous and small branch of radial nerve
brachialis - origin
the distal 1/2 of the anterior surface of the humerus
brachialis - insertion
tuberosity and coronoid process of the ulna
brachialis - actions
FLEX the elbow at the humeroulnar joint
pronator teres - innervation
median nerve
pronator teres - origin
common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna
pronator teres - insertion
middle of the lateral surface of the radius
pronator teres - actions
PRONATE the forearm at the radioulnar joints
assist to FLEX the elbow at the humeroulnar joint
flexor carpi ulnaris - innervation
ulnar nerve
flexor carpi ulnaris - origin
humeral head: common flexor tendon from medial epicondyle of humerus
ulnar head: posterior surface of proximal 2/3 of ulna
flexor carpi ulnaris - insertion
pisiform
hook of hamate
base of 5th metacarpal
flexor carpi ulnaris - actions
FLEX and ADDUCT the wrist at the radiocarpal joint
assist to FLEX the elbow at humeroulnar joint
flexor carpi radialis - innervation
median nerve
flexor carpi radialis - origin
common flexor tendon from medial epicondyle of the humerus
flexor carpi radialis - insertion
bases of the second and third metacarpals
flexor carpi radialis - actions
FLEX and ABDUCT the wrist at radiocarpal joint
may assist to FLEX the elbow at the humeroulnar joint
flexor digitorum superficialis - innervation
median nerve
flexor digitorum superficialis - origin
- common flexor tendon from medial epicondyle of the humerus
- ulnar collateral ligament
- coronoid process of the ulna
- interosseous membrane
- proximal shaft of the radius
flexor digitorum superficialis - insertion
side of the middle phalanges of 2nd-5th fingers
flexor digitorum superficialis - actions
FLEX 2nd-5th fingers
FLEX the wrist at radiocarpal joint
flexor digitorum profundus - innervation
median and ulnar nerves
flexor digitorum profundus - origin
anterior and medial surfaces of proximal 3/4 of ulna
flexor digitorum profundus - insertion
bases of distal phalanges,
palmar surface of 2nd-5th fingers
flexor digitorum profundus - actions
FLEX 2nd-5th fingers at metacarpophalangeal and distal interphalangeal joints
assist to FLEX the wrist at radiocarpal joint
palmaris longus - innervation
median nerve
palmaris longus - origin
common flexor tendon from medial epicondyle of humerus
palmaris longus - insertion
flexor retinaculum
palmar aponeurosis
palmaris longus - actions
TENSE the palmar fascia
FLEX the wrist at radiocarpal joint
may assist to FLEX the elbow at humeroulnar joint
pronator quadratus - innervation
median nerve
pronator quadratus - origin
medial, anterior surface of distal ulna
pronator quadratus - insertion
lateral, anterior surface of distal radius
pronator quadratus - actions
PRONATION of the forearm at radioulnar joints
extensor carpi radialis longus (ECRL2) - innervation
radial nerve
extensor carpi radialis longus (ECRL2) - origin
distal 1/3 of lateral supracondylar ridge of the humerus
extensor carpi radialis longus (ECRL2) - insertion
base of the 2nd metacarpal
extensor carpi radialis longus (ECRL2) - actions
EXTENDS and ABDUCTS the wrist at radiocarpal joint
assist to FLEX the elbow at humeroulnar joint
extensor carpi radialis brevis (ECRB3) - innervation
radial nerve
extensor carpi radialis brevis (ECRB3) - origin
common extensor tendon from the lateral epicondyle of the humerus
extensor carpi radialis brevis (ECRB3) - insertion
base of 3rd metacarpal
extensor carpi radialis brevis (ECRB3) - actions
ABDUCT and EXTEND the wrist at radiocarpal joint
assist to FLEX the elbow at humeroulnar joint
supinator - innervation
radial nerve
supinator - origin
- lateral epicondyle of the humerus
- radial collateral ligament
- annular ligament
- supinator crest of the ulna
supinator - insertion
anterior, lateral surface of proximal 1/3 of radial shaft
supinator - actions
SUPINATES the forearm at the radioulnar joints
ABductor pollicis longus - innervation
radial nerve
ABductor pollicis longus - origin
posterior surface of radius, ulna, and interosseous membrane
ABductor pollicis longus - insertion
base of 1st metacarpal
ABductor pollicis longus - actions
ABDUCTS and EXTENDS the thumb at carpometacarpal jt
ABDUCTS (RADIALLY DEVIATES) the wrist at radiocarpal jt
forms the anterior border of the anatomical snuff box
extensor pollicis longus - innervation
radial nerve
extensor pollicis longus - origin
posterior surface of ulna
interosseous membrane
extensor pollicis longus - insertion
base of distal phalanx of thumb
extensor pollicis longus - actions
EXTEND the thumb (MCP, CMC, and IP joints)
ABDUCT the wrist at radiocarpal joint
extensor pollicis brevis - innervation
radial nerve
extensor pollicis brevis - origin
posterior surface of radius
interosseous membrane
extensor pollicis brevis - insertion
base of proximal phalanx of thumb
extensor pollicis brevis - actions
EXTEND the thumb (MCP and CMC joints)
ABDUCT the wrist at radiocarpal joint
flexor pollicis longus - innervation
median nerve C(6), 7, 8, T1
flexor pollicis longus - origin
anterior surface of the radius
interosseous membrane
flexor pollicis longus - insertion
base of distal phalanx of thumb
flexor pollicis longus - actions
FLEX the thumb (MCP, CMC, IP jts)
assist to FLEX the wrist at radiocarpal joint
Abductor pollicis brevis - innervation
median nerve
Abductor pollicis brevis - origin
flexor retinaculum,
trapezium,
scaphoid tubercles
Abductor pollicis brevis - insertion
base of proximal phalanx of thumb
Abductor pollicis brevis - actions
ABDUCT the thumb (MCP, CMC jts)
assist OPPOSITION of the thumb
flexor pollicis brevis - innervation
superficial head: median nerve
deep head: ulnar nerve
flexor pollicis brevis - origin
superficial head: flexor retinaculum
deep head: trapezium, trapezoid, capitate
flexor pollicis brevis - insertion
base of the proximal phalanx of thumb
flexor pollicis brevis - actions
FLEX the thumb (MCP and CMC joints)
assist in OPPOSITION of the thumb
opponens pollicis - innervation
median nerve C6,7,8,T1
opponens pollicis - origin
flexor retinaculum,
tubercle of trapezium
opponens pollicis - insertion
entire length of 1st metacarpal bone,
radial surface
opponens pollicis - actions
OPPOSITION of thumb (CMC jt) - bringing the pads of thumb and 5th finger together
adductor pollicis (oblique and transverse) - innervation
ulnar nerve C8,T1
adductor pollicis (oblique and transverse) - origin
capitate,
2nd and 3rd metacarpals
adductor pollicis (oblique and transverse) - insertion
base of proximal phalanx of thumb
adductor pollicis (oblique and transverse) - actions
ADDUCT the thumb (MCP, CMC jts)
assist to FLEX the thumb (MCP jt)
adductor digiti minimi - innervation
ulnar nerve C(7),8, T1
adductor digiti minimi - origin
pisiform,
tendon of flexor carpi ulnaris
adductor digiti minimi - insertion
base of proximal phalanx of 5th finger, ulnar surface
adductor digiti minimi - actions
ABDUCT the 5th finger (MCP jt)
assist in OPPOSITION of the 5th finger toward the thumb (MCP jt)
flexor digiti minimi brevis - innervation
ulnar nerve C(7),8,T1
flexor digiti minimi brevis - origin
hook of hamate,
flexor retinaculum
flexor digiti minimi brevis - insertion
base of proximal phalanx of 5th finger, palmar surface
flexor digiti minimi brevis - actions
FLEX the 5th finger (MCP jt)
assist in OPPOSITION of the 5th finger toward the thumb
opponens digiti minimi - innervation
ulnar nerve C(7),8,T1
opponens digiti minimi - origin
hook of hamate,
flexor retinaculum
opponens digiti minimi - insertion
shaft of 5th metacarpal, ulnar surface
opponens digiti minimi - actions
OPPOSITION of 5th finger (CMC jt)
lumbricals of the hand - innervation
2nd and 3rd fingers: median nerve C(6),7,8,T1
4th and 5th fingers: ulnar nerve C(7),8,T1
lumbricals of the hand - origin
surfaces of the flexor digitorum profundus tendons
lumbricals of the hand - insertion
extensor aponeurosis on dorsal surface of phalanges
lumbricals of the hand - actions
EXTEND 2nd - 5th fingers @ IP jts
FLEX 2nd - 5th fingers @ MCP jts
palmar interossei - innervation
ulnar nerve C8,T1
palmar interossei - origin
base of 1st, 2nd, 4th, 5th metacarpals
palmar interossei - insertion
base of proximal phalanx of the related finger,
and the extensor aponeurosis
palmar interossei - actions
ADDUCT the thumb, 2nd, 4th, 5th fingers toward the 3rd finger
assist to FLEX the thumb, 2nd, 4th, 5th fingers (MCP jts)
assist to EXTEND the thumb, 2nd, 4th, 5th fingers (IP jts)
dorsal interossei - innervation
ulnar nerve C8,T1
dorsal interossei - origin
adjacent sides of all metacarpals
dorsal interossei - insertion
base of the proximal phalanx of the 2nd, 3rd, 4th fingers
extensor aponeurosis
dorsal interossei - actions
ABDUCT 2nd, 3rd, 4th fingers (MCP jts)
assist to FLEX 2nd, 3rd, 4th fingers (MCP jts)
assist the EXTEND 2nd, 3rd, 4th fingers (IP jts)
deltoid - innervation
axillary nerve
deltoid - origin
lateral 1/3 of the clavicle
acromion of scapula
spine of scapula
deltoid - insertion
deltoid tuberosity
deltoid - actions
entire deltoid:
ABDUCT GH jt
anterior deltoid:
FLEX, MEDIALLY ROTATE, HORIZONTALLY ADDUCT the GH jt
posterior deltoid:
EXTEND, LATERALLY ROTATE, HORIZONTALLY ABDUCT the GH jt
biceps brachii - innervation
musculocutaneous nerve
biceps brachii - origin
long head:
supraglenoid tubercle of the scapula
short head: coracoid process of the scapula
biceps brachii - insertion
tuberosity of the radius,
aponeurosis of the biceps brachii
biceps brachii - actions
FLEX elbow at humeroulnar jt
SUPINATE forearm at radioulnar joints
FLEX shoulder at glenohumeral jt
triceps brachii - innervation
radial nerve
triceps brachii - origin
long head:
infraglenoid tubercle of the scapula
lateral and medial heads:
posterior surface of the humerus
triceps brachii - insertion
olecranon process of the ulna
triceps brachii - actions
all heads:
EXTEND elbow at humeroulnar jt
long head:
ADDUCT and EXTEND shoulder @ GH jt
brachioradialis - innervation
radial nerve
brachioradialis - origin
proximal 2/3 of the lateral supracondylar ridge of he humerus
brachioradialis - insertion
styloid process of the radius
brachioradialis - actions
FLEX elbow at humeroulnar jt
assist to PRONATE and SUPINATE the forearm when these movements are resisted