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Anatomy Exam 5 > Muscles > Flashcards

Muscles Flashcards

1
Q

Pectoralis major

A

O: anterior medial shaft of clavicle, anterior surface of sternum
I: lateral lip of the intertubercular groove of the humerus
N: Medial and lateral pectoral
A: adduct, medially rotate (extend arm from flexed position)

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2
Q

Pectoralis minor

A

O: 3rd-5th ribs
I: inferior center of the clavicle
N: medial pectoral
A: stabilize scapula, elevate ribs (respiration)

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3
Q

Subclavius

A

O: junction of first rib and manubrium
I: inferior center of the clavicle
N: N to the subclavius
A: anchors and depresses the clavicle

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4
Q

Serratus anterior

A

O: lateral parts of ribs 1-8
I: medial anterior border of scapula
N: long thoracic n
A: protracts, rotates, stabilizes the scapula on the thorax

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5
Q

Deltoid

A

O: lateral 3rd of clavicle, acromion, scapular spine
I: deltoid tuberosity of humerus
N: axillary n
A: anterior flexes and medially rotates, middle abducts, posterior extends and laterally rotates

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6
Q

Supraspinatus

A

Rotator cuff
O: supraspinous fossa of scapula
I: superior aspect of greater tubercle of humerus
N: suprascapular n
A: initiations abduction, stabilize joint

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7
Q

Infraspinatus

A 
Rotator cuff
O: infraspinatus fossa of scapula
I: greater tubercle of the humerus
N: suprascapular n
A: lateral rotation, stabilization
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8
Q

Teres minor

A 
Rotator cuff
O: lateral border of scapula
I: greater tubercle of humerus
N: axillary n
A: lateral rotation, stabilization
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9
Q

Subscapularis

A 
Rotator cuff
O: subscapular fossa
I: lesser tubercle of humerus
N: upper and lower subscapular n
A: medial rotation, stabilization
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10
Q

Teres major

A

O: posterior surface of inferior angle of scapula
I: lesser tubercle of humerus
N: lower subscapular n
A: adduction and medial rotation

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11
Q

Trapezius

A

O: occipital bone, spinous process C1-T12
I: lateral clavicle, acromion, superior border of scapula
N: Accessory
A: elevate, rotate, retract, depress scapula

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12
Q

Levator scapulae

A

O: transverse process C1-C4
I: superior angle of scapula
N: dorsal scapular
A: elevate scapula

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13
Q

Rhomboid major/minor

A

O: spinous process C6-C7/T1-T4
I: medial border of scapula
N: dorsal scapular
A: retract and elevate scapula

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14
Q

Latissimus dorsi

A

O: spinous process T7-T12, thoracolumbar fascia, iliac crest
I: intertubercular groove of humerus
N: thoracodorsal
A: adduct, extend, medially rotate

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15
Q

Biceps brachii

A

O: supraglenoud tubercle of scapula, tip of coracoid process
I: radial tuberosity
N: musculocutaneous
A: supinate and flex forearm, assist in shoulder flexion, resist dislocation

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16
Q

Brachialis

A

O: distal half of anterior humerus
I: coronoid process and ulnar tuberosity
N: musculocutaneous (partially from radial)
A: flex elbow

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17
Q

Coracobrachialis

A

O: tip of coracoid process of scapula
I: middle 1/3 of medial surface of humerus
N: musculocutaneous
A: flexion, adduction, resists glenohumeral dislocation

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18
Q

Pronator teres

A

O: medial epicondyle of humerus, proximal ulna
I: lateral midshaft of radius
N: median
A: pronation

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19
Q

Palmaris longus

A

O: medial epicondyle of humerus
I: palmar aponeurosis
N: median
A: wrist flexion, tense palmar eponeurosis

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20
Q

Flexor carpi radialis

A

O: medial epicondyle of humerus
I: palmar base of 2nd metacarpal
N: median
A: flex and abduct wrist

21
Q

Flexor carpi ulnaris

A

O: medial epicondyle of humerus and olecranon process
I: hook of hamate, pisoform, palmar base of 5th metacarpal
N: ulnar
A: flex and adduct wrist

22
Q

Flexor digitorum superficialis

A

O: medial epicondyle of humerus, proximal radius
I: base of intermediate phalanges of 2-5
N: median
A: flex proximal interphalangeal joint, metacarpophalangeal joint, wrist

23
Q

Flexor digitorum profundus

A

O: ulnar shaft, interosseous membrane
I: base of distal phalanx of 2-5
N: anterior interosseous (lateral, 2-3), ulnar (medial, 4-5)
A: flex distal interphalangeal joint, PIP, MCP, wrist

24
Q

Flexor pollicis longus

A

O: radial shaft, interosseous membrane
I: base of 1st distal phalanx
N: anterior interosseous
A: flex 1st carpometacarpal, MCP, PIP, wrist joints

25
Q

Pronator quadratus

A

O: medial aspect of distal ulna
I: lateral aspect of distal radius
N: anterior interosseous
A: pronation

26
Q

Triceps brachii

A

O: infraglenoid tubercle of scapula, posterior surface of humerus superior and inferior to humeral groove
I: proximal end of olecranon process
N: radial
A: extension of arm, resists dislocation of arm, extension of forearm

27
Q

Anconeus

A

O: lateral epicondyle of humerus
I: lateral surface of olecranon and proximal posterior surface of ulna
N: radial
A: assist in forearm extension, stabilize elbow

28
Q

Brachioradialis

A

O: lateral supracondylar ridge of humerus
I: styloid process of radius
N: radial
A: flexion of forearm

29
Q

Extensor carpi radialis longus

A

O: lateral supracondylar ridge of humerus
I: dorsal base of 2nd metacarpal
N: radial
A: extend and abduct wrist

30
Q

Extensor carpi radialis brevis

A

O: lateral epicondyle of humerus
I: dorsal base of 3rd metacarpal
N: deep branch of radial
A: extend and abduct wrist

31
Q

Extensor carpi ulnaris

A

O: lateral epicondyle of humerus
I: dorsal base of 5th metacarpal
N: deep branch of radial
A: extend wrist and adduct

32
Q

Extensor digitorum

A

O: lateral epicondyle of humerus
I: extensor expansion of digits 2-5
N: deep branch of radial
A: extend digits 2-5 at all joints, extend wrist

33
Q

Extensor digiti minimi

A

O: lateral epicondyle of humerus
I: extensor expansion of digit 5
N: deep branch of radial
A: extend digit 5 at all joints, extend and adduct wrist

34
Q

Supinator

A

O: lateral epicondyle of humerus, posterior olecranon process
I: proximo-lateral radius
N: deep branch of radial
A: supination

35
Q

Abductor pollicis longus

A

O: posterior ulna, radius, interosseous membrane
I: base of 1st metacarpal
N: posterior interosseous (from deep branch of radial)
A: abduct thumb

36
Q

Extensor pollicis longus

A

O: posterior ulna, interosseous membrane
I: base of distal phalanx of pollex
N: posterior interosseous
A: extend pollex at all joints

37
Q

Extensor pollicis brevis

A

O: posterior radius, interosseous membrane
I: base of proximal phalanx of pollex
N: posterior interosseous
A: extend pollex at MCP joint

38
Q

Extensor indicis

A

O: posterior ulna, interosseous membrane
I: extensor expansion of 2nd digit
N: posterior interosseous
A: extend 2nd digit at all joints, extend wrist

39
Q

Abductor pollicis brevis

A

(thenar)
N: recurrent branch of median
A: abduct the thumb

40
Q

Flexor pollicis brevis

A

(thenar)
N: recurrent branch of median (deep head is by deep branch of ulnar)
A: flex the thumb

41
Q

Opponens pollicis

A

(thenar)
N: recurrent branch of median
A: oppose the thumb

42
Q

Abductor digiti minimi

A

(hypothenar)
N: deep branch of ulnar
A: abduct the pinky

43
Q

Flexor digiti minimi brevis

A

(hypothenar)
N: deep branch of ulnar
A: flex the pinky

44
Q

Opponens digiti minimi

A

(hypothenar)
N: deep branch of ulnar
A: oppose the pinky

45
Q

Lumbricals

A

N: medial 2 by deep branch of ulnar, lateral 2 by median
A: flex MCP joints, extend IP joints

46
Q

Dorsal interossei

A

N: deep branch of ulnar
A: abduct

47
Q

Palmar interossei

A

N: deep branch of ulnar
A: adduct

48
Q

Adductor pollicis

A

(not thenar)
N: deep branch of ulnar
A: adduct the thumb

49
Q

Which muscles have dual innervation?

A

Flexor digitorum profundus

Lumbricals

Anatomy Exam 5 (5 decks)

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