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Anatomy Flashcards > Shoulder Muscles (origins, insertions, actions, innervation) > Flashcards

Shoulder Muscles (origins, insertions, actions, innervation) Flashcards

(64 cards)

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1
Q

Trapzius: Insertion

A

Posterior 1/3 clavicle

Medial border acromion; upper border scapular spine

Triangular space base of scapular spine

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2
Q

Trapezius: Origin

A

External occipital protuberance; Ligamentum nuchae

Spinous C7-T3

Spinous T4-T12

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3
Q

Trapezius: Actions

A

Elevation scapula

Retraction scapula

Upward rotation scapula

Depression scapula

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4
Q

Trapezius: Innervation

A

Accessory Nerve (CN XI)

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5
Q

Latissimus dorsi: Origin

A

Spinous T6-T12

Lumbar and sacral vertebrae

Posterior iliac crest

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6
Q

Latissimus dorsi: Insertion

A

Medial lip and floor of intertubercle groove of humerus

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7
Q

Latissimus dorsi: Actions

A

Extension arm

Adduction arm

Internal rotation glenohumeral

Horizontal abduction glenohumeral

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8
Q

Latissimus dorsi: Innervation

A

Thoracodorsal nerve

(C6-C8)

Brachial plexus: Posterior

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9
Q

Levator scapulae: Origin

A

Transverse process C1-C4

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10
Q

Levator scapulae: Insertion

A

Superior angle-Medial border scapula above spine base

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11
Q

Levator scapula: Actions

A

Elevate scapula

downward rotate/adduction

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12
Q

Levator scapulae: Innervation

A

Dorsal scapular nerve (C5)

(C3,C4)

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13
Q

Rhomboid minor: Origin

A

Lower ligamentum nuachae

Spinous C7-T1

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14
Q

Rhomboid minor: Insertion

A

Medial border scapula base of spine

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15
Q

Rhomboid minor: Actions

A

Elevation scapula

Retraction scapula

Downward rotation glenohumeral

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16
Q

Rhomboid minor: Innervation

A

Dorsal scapular nerve

(C5)

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17
Q

Rhomboid major: Origin

A

Spinous T2-T5

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18
Q

Rhomboid major: Insertion

A

Medial border scapula below minor

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19
Q

Rhomboid major: Actions

A

Elevation of scapula

Retraction of scapula

Downward roation glenohumeral

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20
Q

Rhomboid major: Innervation

A

Dorsal scapular nerve

(C5)

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21
Q

Serratus anterior: Origin

A

Anterior Ribs 1-8

Anteriolateral thoracic wall

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22
Q

Serratus anterior: Insertion

A

Inferior angle: anterior medial border scapula

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23
Q

Serratus anterior: Actions

A

Protraction of scapula

Upward rotation glenoid cavity

Holds medial border against thoracic

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24
Q

Serratus anterior: Innervation

A

Long thoracic nerve

(C5-C7)

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25
Deltoid: Origin
Anteriolateral 1/3 clavicle Lateral aspect of acromion Inferior spine of scapula
26
Deltoid: Insertion
Deltoid tuberosity of humerus
27
Deltoid: Actions
Flexion/Internal rotation of arm (horiz/diag add) Abduction (horiz abd) Extension/External rotation of arm (horiz/diag abd)
28
Deltoid: Innervation
Axillary nerve (C5,C6) *Brachial Plexus: Posterior*
29
Sternocleidomastoid: Origin
Sternum (tendinous head) Medial 1/3 clavicle (muscular head)
30
Sternocleidomastoid: Insertion
Mastoid of skull
31
Sternocleidomastoid: Actions
Head flexion same side Head internal rotation
32
Sternocleidomastoid: Innervation
Accessory nerve (CN XI)
33
Subclavius: Origin
1 Rib
34
Subclavius: Insertion
Undersurface clavicle
35
Subclavius: Actions
Depress clavicle Maintain sternoclavicular joint
36
Subclavius: Innervation
Nerve to subclavius | (C5,C6)
37
Supraspinatus: Origin
Medial 2/3 supraspinous fossa
38
Supraspinatus: Insertion
Superior greater tubercle of humerus
39
Supraspinatus: Action
Abduction of arm
40
Supraspinatus: Innervation
Suprascapular nerve (C5,C6) *Brachial Plexus: Upper *
41
Infraspinatus: Origin
Medial infraspinatus fossa
42
Infraspinatus: Insertion
Greater tubercle of humerus below supraspinatus
43
Infraspinatus: Actions
Extension of arm External rotation of arm (Horiz/diag abd arm)
44
Infraspinatus: Innervation
Suprascapular nerve (C5,C6) *Brachial Plexus: Upper*
45
Teres minor: Origin
Upper 2/.3 lateral border scapula
46
Teres minor: Insertion
Greater tubercle of humerus below infraspinatus
47
Teres minor: Actions
Extension arm External rotation of arm (horiz/diag abd of arm)
48
Teres minor: Innervation
Axillary nerve (C5,C6) *Brachial Plexus: Posterior*
49
Teres major: Origin
Posterior inferior angle of scapula
50
Teres major: Insertion
Medial lip intertubicular groove
51
Teres major: Actions
Extension of arm Internal rotation of arm *Adduction of arm*
52
Teres major: Innervation
Lower subscapular nerve (C5,C6) *Brachial plexus: Posterior*
53
Subscapularis: Origin
Subscapular fossa of anterior scapula
54
Subscapularis: Insertion
Lesser tubercle (crest) of humerus
55
Subscapularis: Actions
Internal rotation of arm * Extension of arm* * Adduction of arm*
56
Subscapularis: Innervation
Upper and lower subscapular nerve (C5,C6) *Brachial Plexus: Posterior*
57
Pectoralis major: Origin
Medial anterior 1/3 clavicle Anterior costal cartilate rib 1-6 Sternum
58
Pectoralis major: Insertion
Lateral lip intertubicular groove | (crest greater tubercle)
59
Pectoralis major: Actions
Internal rotation, Adduction Flexion (clavicular fibers) Extension (sternocostal fibers) *horiz/diag add*
60
Pectoralis major: Innervation
Medial pectoralis nerve (C8, T1): *Medial* Lateral pectoralis nerve (C5-C7): *Lateral*
61
Pectoralis minor: Origin
Anterior ribs 3-5
62
Pectoralis minor: Insertion
Coracoid process of scapula
63
Pectoralis minor: Actions
Depress shoulder Down rotation of scapula *Abduct*
64
Pectoralis minor: Innervation
Medial pectoralis nerve (C8, T1) *Brachial Plexus: Medial*

Anatomy Flashcards (13 decks)

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