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Boards > UE Musculature > Flashcards

UE Musculature Flashcards

1
Q

Muscles of shoulder extension

A

Latissimus Doris
Posterior deltoid
Teres major

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2
Q

Muscles of shoulder abduction

A

Supraspinatus

Middle deltoid

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3
Q

Muscles of adduction

A

Pectoralis major
Latissimus Dorsi
Teres major

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4
Q

Muscles of lateral rotation

A

Infraspinatus
Teres minor
Posterior deltoid

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5
Q

Muscles of medial rotation

A 
Subscapularis
Teres major
Pec major
Latissimus Dorsi 
Anterior deltoid
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6
Q

Deltoid

A

O:Lateral third of clavicle; acromion and spine of scapula
I: Deltoid tuberosity of humerus
N: axillary nerve (C5,C6)
A: Clavicular part flexes and medial rotates the arm, acromial part abducts the arm, the spinal part extends and laterally rotates the arm

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7
Q

Coracobrachialis

A

O: Tip of coracoid process of scapula
I: Middle third of medial surface of humerus
N: Musculocutaneous (C5,C6)
A: Flex and adduct arm, resists shoulder dislocation

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8
Q

Biceps brachii

A

O:
Short head: tip of coracoid process
Long head: supraglenoid tubercle of scapula
I: Tuberosity of radius and fascia of forearm via bicipital aponeurosis
N: Musculocutaneous (C5,C6)
A: Supinates forearm and when Supinates flexes forearm, flexes arm
Short head resists shoulder dislocation

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9
Q

Pectoralis major

A

O:
Clavicular head: anterior surface of medial half of clavicle
Sternal head: anterior surface of sternum, superior 6 CC, aponeurosis of external oblique
I: Lateral lip of intertubercular surface of humerus
N: Lateral and medial pectoral nerves; Clavicular head (C5,C6), stern all head (C7,C8,T1)
A: Adducts and medially rotates humerus, draws scapula anterior and inferior
Acting along: Clavicular head flexes the humerus and sternal head extends it from a flexed position.

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10
Q

Latissimus Dorsi

A

O: SP of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs
I: Floor of intertubercular surface of humerus
N: Thoracodorsal (C6,C7,C8)
A: extends, Adducts and medially rotates humerus, raises the body towards arms during climbing.

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11
Q

Teres major

A

O: Posterior surface of inferior angle of scapula
I: Medial lip of intertubercular surface of humerus
N: Lower subscapular nerve (C5,C6)
A: Adducts, medially rotates, and extends the arm

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12
Q

Supraspinatus

A

O: supraspinous fossa of scapula
I: superior facet of greater tubercle of humerus
N: Suprascapular nerve (C4,C5,C6)
A: Initiates and assists deltoid in abduction of arm

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13
Q

Teres minor

A

O: middle part of lateral border of scapula
I: inferior facet of greater tubercle of humerus
N: axillary nerve (C5,C6)
A: Laterally rotates the arm, helps hold humeral head in glenoid cavity

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14
Q

Infraspinatus

A

O: Infraspinous fossa of scapula
I: Middle facet of greater tubercle of humerus
N: Suprascapular nerve (C5,C6)
A: laterally rotates the arm and helps hold humeral head in glenoid cavity

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15
Q

Subscapularis

A

O: subscapular fossa
I: lesser tubercle of humerus
N: upper and lower subscapular nerves (C5,C6,C7)
A: medially rotates and Adducts the arm; helps hold humeral head in glenoid cavity

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16
Q

Muscles of elbow flexion

A

Biceps brachii
Brachialis
Brachioradialis

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17
Q

Muscles of elbow extension

A

Triceps brachii

Aconeus

18
Q

Muscles of forearm supination

A

Biceps brachii

Supinator

19
Q

Muscles of forearm pronation

A

Pronator teres

Pronator quadratus

20
Q

Brachialis

A

O: distal half of anterior surface of humerus
I: coronoid process and tuberosity of ulna
N: Musculocuntaneous nerve (C5,C6)
A: flexes forearm in all positions

21
Q

Brachioradialis

A

O: proximal 2/3 if lateral supra-epicondylar ridge of humerus
I: lateral surface of distal end of radius proximal to styloid process
N: Radial (C5,C6,C7)
A: Relatively weak flexion of forearm, maximal when forearm is in midpronated position

22
Q

Triceps brachii

A

O:
Long head: infra glenoid tubercle of scapula
Lateral head: posterior surface of humerus superior to radial groove
Medial head: posterior surface of humerus inferior to radial groove
I: proximal end of olecranon of ulna and fascia of forearm
N: Radial nerve (C6,C7,C8)
A: extends forearm

23
Q

Anconeus

A

O: lateral epicondyle of humerus
I: lateral surface of olecranon and superior part of posterior surface of humerus
N: Radial nerve (C7,C8,T1)
A: assists triceps in extending forearm, stabilizes elbow joint, abducts ulna during pronation

24
Q

Supinator

A

O: lateral epicondyle of humerus: radial collaterals and annular ligaments, Supinator fossa
I: lateral, posterior, and anterior surfaces of proximal third of radius
N: deep branch of radial nerve (C7,C8)
A: Supinates forearm

25
Q

Pronator Teres

A

O:
Ulnar head: coronoid process of ulna
Humeral head: medial epicondyle of humerus
I: middle convexity of lateral surface of radius
N: median nerve (C6,C7)
A: pronates and flexes forearm at elbow

26
Q

Pronator quadratus

A

O: distal quarter of anterior surface of ulna
I: distal quarter of anterior surface of radius
N: AIN from median nerve (C8,T1)
A: pronates forearm, deep fibers bind radius and ulna together

27
Q

Flexor Carpi radialis

A

O: medial epicondyle of humerus
I: base of 2nd metacarpal
N: Median nerve (C6,C7)
A: flexes and abducts hand at wrist

28
Q

Flexor Carpi ulnaris

A

O: olecranon and posterior border
I: pisiform, hook of hamate, 5th metacarpal
N: Ulnar nerve (C7,C8)
A: flexes and abducts the hand at the wrist

29
Q

Palmaris longus

A

O: medial epicondyle of humerus
I: distal half of flexor retinaculum
N: median nerve (C7,C8)
A: flexes hand at wrist and tenses palmar aponeurosis

30
Q

Muscles of wrist flexion

A

Flexor Carpi radialis
Flexor Carpi ulnaris
Palmaris longus

31
Q

Muscles of wrist extension

A

Extensor Carpi radialis longus
Extensor Carpi radialis brevis
Extensor Carpi ulnaris

32
Q

Radial deviation

A

ECR
FCR
EPL
EPB

33
Q

Ulnar deviation

A

ECU

FCU

34
Q

Extensor Carpi radialis longus

A

O: lateral supra epicondylar ridge of humerus
I: dorsal aspect of base of 2nd Metacarpal
N: radial nerve (C6,C7)
A: extend and abduct hand at the wrist

35
Q

Extensor Carpi radialis brevis

A

O: lateral epicondyle of humerus
I: dorsal aspect of base of 3rd metacarpal
N: Deep branch of radial nerve (C7,C8)
A: extend and abduct the hand at the wrist joint
Active during fist clenching.

36
Q

Extensor Carpi ulnaris

A

O: lateral epicondyle of humerus, posterior border of ulna
I: dorsal aspect of base of 5th metacarpal
N: PIN (C7,C8) off of radial nerve
A: extends and adducts hand at wrist joint

37
Q

Extensor pollicis longus

A

O: posterior surface of middle third of ulna and interosseous membrane
I: dorsal aspect of base of distal phalanx of thumb
N: PIN (C7,C8)
A: extends distal phalanx of thumb at IP joint, extends MCP and CMC joints

38
Q

Extensor pollicis brevis

A

O: posterior surface of distal third of radius and interosseous membrane
I: dorsal aspect of base of proximal phalanx of thumb
N: PIN (C7,C8)
A: extends proximal phalanx of thumb at MCP joint, extends MCP joint

39
Q

Flexor digitorum superficialis

A

O:
Humeroulnar:medial epicondyle of humerus and coronoid process of ulna
Radial: oblique line of radius
I: shafts of middle phalanges of medial 4 digits
N: Medial (C7,C8,T1)
A: Flexes PIP of middle 4 digits, flexes proximal phalanges at MCP joints

40
Q

Flexor digitorum profundus

A

O: proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
I: bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
N: digits 2 and 3- median nerve (C8,T1/ AIN)
Digits 4 and 5- ulnar nerve (C8,T1)
A: flexes DIP joints of digits 2-5 and assists with wrist flexion

41
Q

Muscles of shoulder flexion

A

Anterior deltoid
Coracobrachialis
Pectoralis major
Biceps brachii

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