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Biol 252L > Muscles of the Upper Limb > Flashcards

Muscles of the Upper Limb Flashcards

1
Q

Upper Limb Musculature

A

Muscles must cross a joint to move that joint

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2
Q

Superficial Humeral Muscles

A

Attach to the humerus and produce the major movements of the shoulder
- Deltoid, pectoralis major, latissimus dorsi

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3
Q

Pectoralis Major

A

Adducts the glenohumeral joint

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4
Q

Latissimus Dorsi

A

Extension (rowing boat) and adducts the glenohumeral joint

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5
Q

Deltoid

A

Abduction of the glenohumeral joint and anterior/posterior heads can function along in flexion and extension of glenohumeral joints respectively

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6
Q

Scapular Muscles

A

Trapezius, pectoralis minor, serratus anterior, levator scapulae, rhomboids (major and minor)

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7
Q

Trapezius

A

Broad muscle attachment spanning from the head to the last thoracic vertebra, elevation/depression/retracting scapula, each laterally flexes neck (move head to ear)

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8
Q

Pectoralis Minor

A

Lies deep to the pectoralis major and depressses scapula

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9
Q

Serratus Anterior

A

Protracts the scapula (boxer’s muscle - extends reach of the arm)

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10
Q

Levator scapulae

A

Elevates the scapula

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11
Q

Rhomboids (major & minor)

A

Retract the scapula

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12
Q

Deep Humeral Muscles

A

Synergists to superficial muscles and provide additional movements to the glenohumeral joint (Rotator Cuff muscles, coracobrachialis, and teres major, supraspinatus, infraspinatus, teres minor)

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13
Q

Coracobrachialis

A

Adductor of the glenohumeral joint

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14
Q

Teres Major

A

Extensor of the glenohumeral joint that also internally rotates the joint

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15
Q

Rotator Cuff Muscles

A

Originate at the scapula and insert to the proximal humerus
(Supraspinatus, infraspinatus, teres minor - attach posteriorluy on scapula)
Subscapularis

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16
Q

Deep Humeral Muscles

A

Teres major, coracobrachialis, Supraspinatus, infraspinatus, teres minor, subscapularis

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17
Q

Teres Minor

A

External rotation of the glenohumeral joint

18
Q

Supraspinatus

A

Abduction of the glenohumeral joint

19
Q

Infraspinatus

A

External Rotation of the glenohumeral joint

20
Q

Subscapularis

A

Internal rotation of the glenohumeral joint

21
Q

Posterior Brachial Muscles

A

Triceps: extension of the elbow
Anconeus: Extension of the elbow

22
Q

Anterior Brachial Muscles

A

Brachialis: flexion of the elbow
Biceps Brachii: flexion of the elbow

23
Q

Posterior Antebrachial Muscles

A

Brachioradialis, extensor carpi radialis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, supinator, extensor indicis, extensor pollicis)

24
Q

Brachioradialis

A

Flexor of the elbow joint

25
Q

Extensor carpi radialis (longus and brevis)

A

Extends the radial (lateral) sides of the wrist

26
Q

Extensor digitorum

A

Extends digits 2-4

27
Q

Extensor digiti minimi

A

extends digit V (drinking tea)

28
Q

Extensor Carpi Ulnaris

A

Extends the ulnar (medial) side of the wrist

29
Q

Supinator

A

Deeper layer than the other posterior antebrachial muscles.
Unwinds and externally rotates the radius = supination

30
Q

Anterior Antebrachial Muscles

A

Flexor digitorum superficialis, pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, pronator quadratus, flexor digitorum profundus and flexor pollicis longus)

31
Q

Flexor Digitorum Superficialis

A

Largest anterior antebrachial muscles, flat, sends tendons to phalanges for flexions

32
Q

Pronator teres

A

Internally rotates the radius, pronation of the hand

33
Q

Flexor Carpi Radialis

A

Flexes the radial (lateral) side of the wrist

34
Q

Palmaris Longus

A

Attaches to a thick connective tissues of the hand (palmar aponeurosis)
Contraction of palmaris longus tenses the aponeurosis, flexes the wrist

35
Q

Flexor Carpi Ulnaris

A

Flexes the ulnar (medial) side of the wrist

36
Q

Pronator Quadratus

A

Assists the pronator teres in pronation of the hand

37
Q

Flexor digitorum profundus

A

Flexes digits 2-5

38
Q

Flexor pollicis longus

A

Flexes digit 1

39
Q

Extensor Indicis

A

Extension of digit 2

40
Q

Extensor pollicis (longus and brevis)

A

Extension of digit 1

41
Q

Abductor Pollicis Longus

A

Abduction of digit 1

Biol 252L (18 decks)

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