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Muscles > Shoulder Complex & Elbow > Flashcards

Shoulder Complex & Elbow Flashcards

Origins, Insertions, Actions of UE mm

1
Q

Flexors of the shoulder (4)

A

anterior deltoid, pectoralis major (clavicular head), coracobrachialis, biceps brachii

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2
Q

pectoralis major (clavicular head)

A

O: medial 1/2 of clavicle
I: lateral lip of biciptal groove
A: flexion of humerus to 90 degrees
N: Lateral and Medial Pectoral (C5, C6, C7, C8, T1)

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3
Q

infraspinatus

A

O: infraspinous fossa
I: greater tubercle of humerus (middle facet)
A: lateral rotation & extension of shoulder; stabilizes head of humerus in glenoid fossa.
N: Suprascapular (C5, C6)

part of rotator cuff

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4
Q

abductors of shoulder (2)

A

supraspinatus, middle deltoid

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5
Q

extensors of shoulder (7)

A

latissimus dorsi, teres major, posterior deltoid, infraspinatus, teres minor, triceps brachii (long head), pectoralis major (sternal head)

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6
Q

adductors of shoulder (5)

A

pectoralis major as a whole, coracobrachialis, latissimus dorsi, teres major, subscapularis

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7
Q

lateral rotators of shoulder (3)

A

infraspinatus, teres minor, posterior deltoid

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8
Q

medial rotators of shoulder (5)

A

anterior deltoid, pectoralis major, subscapularis, teres major, latissimus dorsi

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9
Q

horizontal adductors of shoulder (2)

A

anterior deltoid, pectoralis major

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10
Q

horizontal abductors of shoulder (1)

A

posterior deltoid

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11
Q

elbow flexors (3)

A

biceps brachii, brachialis, brachioradialis

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12
Q

elbow extensors (2)

A

triceps brachii, anconeus

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13
Q

coracobrachialis

A

O: coracoid process
I: middle portion of medial surface of humerus
A: flexion, adduction of humerus

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14
Q

depressors of scapula (2)

A

pectoralis minor, lower trapezius

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15
Q

elevators of scapula (2)

A

upper trapezius, levator scapulae

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16
Q

retractors of scapula (2)

A

middle trapezius, rhomboids

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17
Q

supraspinatus

A

O: supraspinous fossa
I: greater tubercle of humerus (superior facet)
A: abduction, stabilizes head of humerus in glenoid fossa
N: Suprascapular (C5, C6)

part of rotator cuff

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18
Q

teres major

A

O: inferior angle of scapula, lower 1/3 of axillary border
I: medial lip of bicipital groove
A: extension, adduction, & medial rotation of humerus
N: Subscapular (C5, C6)

19
Q

middle deltoid

A

O: lateral acromion process
I: deltoid tuberosity
A: abduction of humerus
N: Axillary (C5, C6)

20
Q

posterior deltoid

A

O: lateral spine of scapula
I: deltoid tuberosity
A: extension, lateral rotation, horizontal abduction of humerus
N: Axillary (C5,C6)

21
Q

upward rotators of scapula (3)

A

upper trapezius, lower trapezius, serratus anterior

22
Q

downward rotators of scapula (3)

A

levator scapulae, rhomboids, pectoralis minor

23
Q

protractors of scapula (2)

A

serratus anterior, pectoralis minor

24
Q

anterior deltoid

A

O: lateral 1/3 of clavicle
I: deltoid tuberosity
A: flexion, horizontal adduction, medial rotation of humerus
N: Axillary (C5, C6)

25
Q

rhomboid major

A

O: T2-T5 spinous processes
I: vertebral border of scapula from inferior angle to root of spine
A: retraction & downward rotation of scapula
N: Dorsal Scapular Nerve (C5)

26
Q

rhomboid minor

A

O: C7-T1 spinous processes
I: root of spine of scapula
A: retraction & downward rotation of scapula
N: Dorsal Scapular Nerve (C5)

27
Q

middle trapezius

A

O: occiput; ligamentum nuchae; C7-T12 spinous processes
I: spine of scapula
A: retraction of scapula
N: Cranial Nerve XI

28
Q

latissimus dorsi

A

O: last 3-4 ribs, thoracolumbar fascia, T7-T12 spinous processes, iliac crest & inferior angle of scapula
I: bicipital groove
A: extension, medial rotation, adduction of humerus
N: Thoracodorsal (C6, C7, C8)

29
Q

levator scapulae

A

O: transverse processes of C1-C4
I: vertebral border of scapula from superior angle to root of spine
A: elevation & downward rotation of scapula
N: Dorsal Scapular (C5)

30
Q

serratus anterior

A

O: lateral surface of upper 8 ribs
I: vertebral border of scapula
A: protraction, upward rotation of scapula, stabilize it against chest wall
N: Long Thoracic (C5, C6, C7)

31
Q

pectoralis major (as a whole - action only)

A

A: adduction, horizontal adduction, medial rotation of humerus
N: Lateral and Medial Pectoral (C5, C6, C7, C8, T1)

32
Q

pectoralis major (sternal head)

A

O: whole surface of sternum & cartilage of first 6 ribs
I: lateral lip of bicipital groove
A: extension of humerus from flexed position
N: Lateral and Medial Pectoral (C5, C6, C7, C8, T1)

33
Q

subscapularis

A

O: subscapular fossa
I: lesser tubercle of humerus
A: medial rotation of shoulder, stabilizes head of humerus in glenoid fossa, small amount of abduction of humerus
N: Subscapular (C5, C6)

34
Q

upper trapezius

A

O: occiput, ligamentum nuchae, C7-T12 spinous processes
I: lateral clavicle, acromion process
A: elevation & upward rotation of scapula
N: Cranial Nerve XI

35
Q

lower trapezius

A

O: occiput, ligamentum nuchae, C7-T12 spinous processes
I: root of spine of scapula
A: depression & upward rotation of scapula
N: Cranial Nerve XI

36
Q

pectoralis minor

A

O: ribs 3,4,5
I: coracoid process
A: protraction, depression & downward rotation of scapula
N: Medial Pectoral (C8, T1)

37
Q

teres minor

A

O: upper 2/3 of axillary border of scapula
I: greater tubercle (inferior facet)
A: lateral rotation, extension of humerus, stabilizes head of humerus in glenoid fossa
N: Axillary (C5, C6)

38
Q

scapulohumeral rhythm

A

2:1 ratio, humerus to scapular movement

39
Q

biceps brachii

A

O: long head - supraglenoid tubercle of scapula
short head - coracoid process of scapula
I: radial tuberosity of radius
A: flexion of elbow, supination of forearm, flexion of humerus
N: Musculocutaneous (C5, C6)

40
Q

brachialis

A

O:distal 1/2 of anterior surface of humerus
I: tuberosity of ulna, coronoid process of ulna
A: flexion of elbow
N: Musculocutaneous (C5, C6)

41
Q

triceps brachii

A

O: long head - infraglenoid tubercle of scapula
short head - posterior surface of humerus, above spiral groove
medial head - posterior surface of humerus, below spiral groove
I: olecranon process of ulna
A: extension of elbow, assists in extension of humerus
N: Radial nerve (C7, C8)

42
Q

anconeus

A

O: lateral epicondyle of humerus
I: olecranon process of ulna
A: assists w/ extension of elbow
N: Radial nerve (C7, C8)

43
Q

brachioradialis

A

O: lateral supercondylar ridge of humerus
I: styloid process of radius
A: flexion of elbow in neutral position of forearm (drinking muscle!)
N: Radial nerve (C5, C6)

Muscles (5 decks)

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