Muscle O, I, A, Innervation Flashcards
Biceps Brachii - Attachments
Long head - supraglenoid tubercle
Short head - coracoid process
Both to the radial tuberosity
Innervation to the biceps brachii
Musculocutaneous
Brachialis attachments
Distal half of ant humerus to the coronoid process and ulnar tuberosity
Innervation of the brachialis
Musculocutaneous AND radial
Biceps brachii function
Flexes and supinates forearm
Brachialis function
flexes forearm
Coracobrachialis attachments
Coracoid process to middle 1/3 of medial humerus
Coracobrachialis action
flexion and adduction of the humerus
Innervation of the coracobrachialis
musculocutaneous
Pronator teres attachments
sup (humeral) head = medial epicondyle
deep (ulnar) head = proximal ulna
Both to the lateral midshaft of the radius
Innvervation of the pronator teres
Median nerve
Pronator teres action
pronation
Palmaris longus attachments
Medial epicondyle to the palmar aponeurosis
Innervation of palmaris longus
median
Action of palmaris longus
flexes wrist
tenses the palmar aponeurosis
Flexor carpi radialis attachments
Medial epicondyle of humerus to the palmar base of Mc 2
Flexor carpi radialis innervation
Median
Action of the flexor carpi radialis
flexes the wrist
radial deviation of the wrist
Flexor carpi ulnaris attachments
Medial epicondyle and olecranon process to the hook of the hamate, pisiform, and Mc 5
Innervation of flexor carpi ulnaris
Ulnar
Action of the flexor carpi ulnaris
Flex wrist
Ulnar deviation
Flexor digitorum superficialis attachments
Medial epicondyle and proximal radius to the base of the intermediate phalanges of digits 2-5
Innervation of flexor digitorum superficialis
Median
Action of the flexor digitorum superficialis
flex PIP, MCP, and wrist
Flexor digitorum profundus attachments
Ulnar shaft and int membrane to the base of distal phalanx of 2-5
Innervation of flexor digitorum profundus
digits 2 and 3 = ant interosseous
digits 4 and 5 = ulnar
Action of flexor digitorum profundus
flex DIP, PIP, MCP, and wrist
Attachments of the flexor pollicis longus
Radial shaft and int mem to the base of the distal phalanx of digit 1
Innervation of the flexor pollicis longus
ant interosseous
Action of the flexor pollicis longus
flex 1st CMC, MCP, IP and wrist joints
Pronator quadratus attachments
Medial aspect of distal ulna to lateral aspect of distal aspect
Innervation of the pronator quadratus
ant interosseous
Action of the pronator quadratus
Pronates
Triceps attachments
Long = infraglenoid
Lat = post humerus sup to radial groove
Med = post humerus inf to radial groove
All to the olecranon
Triceps innervation
radial
Triceps action
extension
Anconeus attachments
Lateral epicondyle to the lateral olecranon
Action of anconeus
assists in extension
Brachioradialis attachments
lateral supracondylar ridge to styloid of radius
Innervation of brachioradialis
radial
Action of brachioradialis
flexion of forearm
some pronation and supination
Attachments of extensor carpi radialis longus
lateral supracondylar ridge to dorsal base of Mc 2
Innervation of extensor carpi radialis longus
Radial
Action of the extensor carpi radialis longus
Extends and radial deviates the wrist
Attachments of the extensor carpi radialis brevis
Lateral epicondyle of humerus to dorsal base of Mc 3
Innervation of the extensor carpi radialis brevis
Deep branch of radial
Action of extensor carpi radialis
Extends and radial deviates wrist
Attachments of extensor carpi ulnaris
Lateral epicondyle to the dorsal base of Mc 5
Innervation of the extensor carpi ulnaris
Deep branch of radial
Action of the extensor carpi ulnaris
Extends and ulnar deviates the wrist
Attachments of the Extensor digitorum
Lateral epicondyle to extensor expansion of digits 2-5
Innervation of the extensor digitorum
Deep branch of radial
Action of extensor digitorum
extends digits 2-5 at all joints
extends the wrist
Extensor digiti minimi attachments
lateral epicondyle to the extensor expansion of digit 5
Innervation of the extensor digiti minimi
deep branch of the radial
Action of extensor digiti minimi
extends digit 5 at all joints
extends wrist and ulnar deviates the wrist
Supinator attachments
Lateral epicondyle and olecranon to the proximal lateral radius
Innervation of the supinator
Deep branch of radial
Supinator action
supinates
Abductor pollicis longus attachments
Post ulna, radius, int mem to the base of Mc 1
Innervation of abductor pollicis longus
post interosseus
Action of abductor pollicis longus
abducts pollex
Extensor pollicis longus attachments
post ulna, int mem to the base of distal phalanx of pollex
Innervation of extensor pollicis longus
post interosseous
Action of extensor pollicis longus
Extends pollex at all joints
Extensor pollicis brevis attachments
Post radius, int mem to the base of proximal phalanx of pollex
Innervation of ext pollicis brevis
Post int
Action of ext pollicis brevis
extends pollex at MCP
Attachments of the extensor indicis
Post ulna, int mem to teh extensor expansion of digit 2
Innervation of extensor indicis
post int