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Anatomy- Cadaver Lab > Pectoral and Anterior Shoulder/Arm > Flashcards

Pectoral and Anterior Shoulder/Arm Flashcards

1
Q

Platysma Origin

A

fascia of the upper thorax and lower neck

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2
Q

Platysma Insertion

A

mandible (along chin), skin of the face over the mandible (along chin), muscles of the lower lip and angle of mouth

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3
Q

Platysma Action

A

Pulls on skin of neck (elevates) to give expression of “horror” or “fright”. Depression of lower lip and angle of mouth

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4
Q

Platysma Innervation

A

facial nerve (Cranial Nerve VII)

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5
Q

Platysma Blood supply

A

facial artery

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6
Q

Sternocleidomastoid Origin

A

manubrium of sternum; medial 1/3 of clavicle

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7
Q

Sternocleidomastoid Insertion

A

mastoid process of temporal bone

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8
Q

Sternocleidomastoid Actions

A

rotates head and neck while elevating chin (one side working) flexes head and neck (both sides working)

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9
Q

Sternocleidomastoid Innervation

A

accessory nerve (Cranial Nerve XI)

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10
Q

Sternocleidomastoid Blood supply

A

occipital artery

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11
Q

Pectoralis Major Origin

A

medial 2/3 of clavicle (clavicular portion), entire length of sternum (sternocostal portion), upper 6 costal cartilages
(sternocostal portion)

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12
Q

Pectoralis Major Insertion

A

crest of greater tubercle of humerus

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13
Q

Pectoralis Major Actions

A

flexion of humerus (clavicular portion only), extension of humerus (sternocostal portion only), adduction of humerus, medial
rotation of humerus

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14
Q

Pectoralis Major Innervation

A

lateral pectoral nerve (clavicular portion), medial pectoral nerve (sternocostal portion)

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15
Q

Pectoralis Major Blood supply

A

thoracoacromial artery

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16
Q

Pectoralis Minor Origin

A

ribs 3, 4 and 5

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17
Q

Pectoralis Minor Insertion

A

coracoid process of scapula

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18
Q

Pectoralis Minor Actions

A

protraction of scapula, depression of scapula, downward rotation of scapula

19
Q

Pectoralis Minor Innervation

A

medial pectoral nerve

20
Q

Pectoralis Minor Blood supply

A

thoracoacromial artery

21
Q

Serratus Anterior Origin

A

anterolateral surface of ribs 1-8

22
Q

Serratus Anterior Insertion

A

medial border of scapula, inferior angle of scapula

23
Q

Serratus Anterior Action

A

protraction of scapula, upward rotation of scapula, depression of scapula

24
Q

Serratus Anterior Innervation

A

long thoracic nerve

25
Q

Serratus Anterior Blood supply

A

lateral thoracic artery

26
Q

Deltoid Origin

A

lateral 1/3 of clavicle, acromion process of scapula, spine of scapula

27
Q

Deltoid Insertion

A

deltoid tuberosity of humerus

28
Q

Deltoid Action

A

anterior fibers: flexion of humerus, medial rotation of humerus
lateral fibers: abduction of humerus after first 5-10°
posterior fibers: extension of humerus, lateral rotation of humerus

29
Q

Deltoid Innervation

A

Axillary n.

30
Q

Deltoid Blood supply

A

thoracoacromial trunk and anterior and posterior circumflex humeral aa.

31
Q

Biceps brachii Origin

A

coracoid process of scapula (short head); supraglenoid tubercle of scapula (long head)

32
Q

Biceps brachii Insertion

A

radial tuberosity of radius, bicipital aponeurosis

33
Q

Biceps brachii Action

A

forearm supination, forearm, and weak role shoulder flexion

34
Q

Biceps brachii Blood supply

A

brachial a.

35
Q

Coracobrachialis Origin

A

coracoid process of scapula

36
Q

Coracobrachialis Insertion

A

mid-medial surface of humerus

37
Q

Coracobrachialis Action

A

flexion of humerus, adduction of humerus

38
Q

Coracobrachialis Innervation

A

musculocutaneous n.

39
Q

Coracobrachialis Blood supply

A

brachial and anterior circumflex humeral a.

40
Q

Brachialis Origin

A

lower anterior surface of humerus

41
Q

Brachialis Insertion

A

ulnar tuberosity of ulna

42
Q

Brachialis Action

A

flex forearm

43
Q

Brachialis Innervation

A

musculocutaneous nerve

44
Q

Brachialis Blood supply

A

brachial a.

Anatomy- Cadaver Lab (6 decks)

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