Shared Flashcard Set

Details

Upper Extremity Muscles
Origin, Insertion, Action, Innervation of Upper Extremity Muscles
49
Anatomy
Graduate
01/03/2012

Additional Anatomy Flashcards

 


 

Cards

Term
Trapezius
Definition

O: external occipital protuberance, superior nuchal line and ligament, spinous processes C7-T12

I: lateral 1/3 clavicle, acromion, spine of scapula

A: elevates, retracts, rotates scapula

N: motor from CN XI, sensory from C3-4

Term
Latissimus Dorsi
Definition

O: iliac crest, thoracolumbar fascia, spinous processes T6-T12, inferior angle scapula, inferior 3 ribs

I: floor intertubercular sulcus

A: adducts, internally rotates, extends arm

N: C6,7,8 thoracodorsal nerve

Term
Levator Scapulae
Definition

O: transverse processes C1-4

I: superior part of medial border of scapula

A: elevate scapula, rotate scapula medially, tilt glenoid cavity inferiorly

N: dorsal scapular nerve C4-5

Term
Rhomboid Minor
Definition

O: spinous processes C7-T1

I: medial border scapula

A: retract, rotate scapula. depress glenoid cavity

N: dorsal scapular nerve C5

Term
Rhomboid Major
Definition

O: spinous processes T2-T5

I: medial border scapula

A: retract, rotate scapula. depress glenoid cavity

N: C5 dorsal scapular nerve

Term
Deltoid
Definition

O: lateral 1/3 clavicle, acromion, spine of scapula

I: deltoid tuberosity of humerus

A: flex, extend, abduct arm

N: C5,6 axillary nerve

Term
Supraspinatus
Definition

O: suprasinous fossa

I: greater tubercle of humerus

A: initiate abduction of arm, assist deltoid in abduction, holds humeral head in glenoid cavity

N: suprascapular nerve C5, 6

Term
Infraspinatus
Definition

O: Infraspinous fossa

I: greater tubercle humerus

A: laterally rotate arm, hold humeral head in glenoid cavity

N: suprascapular nerve C5,6

 

Term
Teres Minor
Definition

O: superior part of lateral border of scapula

I: greater tubercle humerus

A: laterally rotate arm. hold humeral head in glenoid cavity

N: axillary C5,6

Term
Teres Major
Definition

O: inferior angle scapula

I: intertubercular sulcus

A: adduct, medially rotate arm

N: Lower Subscapular C6,7

Term
Subscapularis
Definition

O: subscapular fossa

I: lesser tubercle humerus

A: adduct, medially rotate arm; holds humeral head in glenoid fossa

N: upper and lower subscapular nerves C5,6,7

Term
Serratus Anterior
Definition

O: external surfaces of lateral parts of ribs 1-8

I: anterior surface of medial border of scapula

A: rotates scapula laterally. protracts scapula and holds it against thoracic wall

N: long thoracic nerve C5, 6, 7

Term
Pectoralis Major
Definition

O: clavicular head: medial half of anterior clavicle; sternocostal head: anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external obilque

I: lateral lip of intertubercular sulcus humerus

A: adduct, medially rotate arm. clavicular head can flex arm. sternocostal head can extend arm from flexed position

N: medial (C8, T1) and lateral (C5,6) pectoral nerves

Term
Pectoralis Minor
Definition

O: 3-5 ribs near costal cartilages

I: coracoid process

A: stabilize scapula against thoracic wall; accessory respiratory muscle

N: medial pectoral nerve C8, T1

Term
Biceps Brachii
Definition

O: long head: supraglenoid tubercle; short head: coracoid process

I: tuberocity of the radius, bicipital aponeurosis

A: flex arm at shoulder and elbow, supinate forearm

N: musculocutaneous C5,6

Term
Brachialis
Definition

O: distal, anterior humerus

I: coronoid process and ulnar tuberosity

A: flex forearm

N: musculocutaneus C5,6

Term
Coracobrachialis
Definition

O: coracoid process
I: middle, medial humerus

A: flex, adduct arm at shoulder

N: musculocutaneous C5,6,7 

Term
Triceps Brachii
Definition

O: Long head: infraglenoid tubercle of scapula; Short head: posterior surface of humerus superior to radial groove; Medial head: posterior surface of humerus inferior to radial groove

I: olecranon process of ulna

A: extend arm

N: radial nerve C6,7,8

Term
Anconeus
Definition

O: lateral epicondyle humerus

I: lateral surface of olecranon and superior, posterior ulna

A: extends forearm; stabilizes elbow

N: radial nerve C7,8, T1

Term
Pronator Teres
Definition

O: medial epicondyle humerus, coronoid process ulna

I: middle lateral radius

A: pronate forearm, flex elbow

N: Median nerve C6,7

Term
Flexor Carpi Radialis
Definition

O: medial epicondyle humerus

I: base of 2nd metacarpal

A: flex and abduct hand at wrist

N: Median C6, C7

Term
Palmaris Longus
Definition

O: medial epicondyle humerus

I: palmar aponeurosis, flexor retinaculum

A: flex wrist, tighten palmar aponeurosis

N: median nerve C7,8

Term
Flexor Carpi Ulnaris
Definition

O: humeral head: medial epicondyle humerus; ulnar head: olecranon process and posterior border of ulna

I: pisiform bone, hook of hamate, base of 5th metacarpal

A: flex, adduct wrist

N: ulnar nerve C7, 8

Term
Flexor Digitorum Superficialis
Definition

O: Humeroulnar head: medial epicondyle humerus, ulnar collateral ligament, coronoid process; Radial head: superior anterior radius

I: tendons split and insert into middle phalanx of digits 2-5

A: flexes PIPJ and MPJ of digits 2-5

N: median nerve C7, C8, T1

Term
Flexor Digitorum Profundus
Definition

O: Proximal anterior ulna and interosseous membrane

I: base of distal phalanges 2-5

A: flex DIPJ 2-5 and assists with wrist flexion

N: medial part: ulnar nerve C8, T1; lateral part: median nerve C8, T1

Term
Flexor Pollicis Longus
Definition

O: anterior radius and interosseous membrane

I: base of distal phalanx of thumb

A: flexes thumb IPJ

N: anterior interosseous nerve branch of median nerve C8, T1

Term
Pronator Quadratus
Definition

O: distal anterior ulna

I: distal anterior radius

A: pronates forearm, binds ulna and radius together

N: anterior interosseous nerve branch of median nerve C8, T1

Term
Brachioradialis
Definition

O: proximal lateral supracondylar ridge of humerus

I: lateral surface of distal radius

A: flexes forearm

N: Radial nerve C5,6,7

Term
Extensor Carpi Radialis Longus
Definition

O: lateral supracondylar ridge humerus

I: base of 2nd metacarpal

A: extend and abduct hand at wrist

N: radial nerve C6,7

Term
Extensor Carpi Radialis Brevis
Definition

O: lateral epicondyle humerus
I: base of 3rd metacarpal

A: extend and abduct hand at wrist

N: Deep branch radial nerve C7,8 

Term
Extensor Digitorum
Definition

O: lateral epicondyle humerus

I: extensor hood digits 2-5 

A: extends MCP joints 2-5 and extends hands at wrist

N: posterior interosseous nerve from deep branch of radial nerve C7,8

Term
Extensor Digiti Minimi
Definition

O: lateral epicondyle humerus

I: extensor hood 5th digit

A: extends 5th digit at MCP and IP

N: posterior interosseous nerve branch of deep branch radial nerve C7,8

Term
Extensor Carpi Ulnaris
Definition

O: lateral epicondyle humerus and posterior humerus

I: base of 5th metacarpal

A: adducts, extends wrist

N: posterior interossous nerve branch of deep branch radial nerve C7,8

Term
Supinator
Definition

O: lateral epicondyle humerus, radial/collateral/annular ligaments, supinator fossa, ulnar crest

I: lateral/posterior/anterior surfaces of proximal radius

A: supinates forearm

N: deep branch radial nerve C5,6

Term
Abductor Pollicis Longus
Definition

O: posterior ulna, radius, interosseous membrane

I: base of 1st metacarpal

A: abduct thumb and assist in extension at carpometacarpal joint

N: posterior interosseous nerve branch of deep branch radial nerve C7,8

Term
Extensor Pollicis Brevis
Definition

O: posterior surface of radius and interosseous membrane

I: base of proximal phalanx thumb

A: extends proximal phalanx of thumb

N: posterior interosseous nerve branch of deep branch of radial nerve C7, 8

 

Term
Extensor Pollicis Longus
Definition

O: posterior middle ulna and interosseous membrane

I: base of distal phalanx of thumb

A: extends distal phalanx of thumb

N: posterior interosseous nerve branch of deep branch of radial nerve C7,8

Term
Extensor Indicis
Definition

O: posterior ulna and interosseous membrane

I: extensor hood 2nd digit

A: extend 2nd digit. assist in hand extension

N: posterior interosseous nerve C7,8

Term
What are the thenar muscles?
Definition
abductor pollicis brevis, flexor pollicis brevis, opponens pollics
Term
What innervates the thenar muscles?
Definition
recurrent branch of median nerve C8, T1
Term
what are the hypothenar muscles of the hand?
Definition
abductor digiti minimi, flexor digiti minimi, opponens digiti minim
Term
what innervates the hypothenar muscles?
Definition
deep branch ulnar nerve C8, T1
Term
what muscle is in the adductor compartment?
Definition
adductor pollicis
Term
what innervates adductor pollicis?
Definition
deep branch ulnar nerve C8, T1
Term
lumbricals action and innervation
Definition

A: flex MCP, extend IP

N: medial 2: ulnar nerve; lateral 2: median nerve

Term
action of palmar interossei
Definition
adduct digits
Term
action of dorsal interossei
Definition
abduct digits
Term
innervation of interossei
Definition
deep branch ulnar nerve C8, T1
Supporting users have an ad free experience!