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Anatomy Y1 S2 > Muscles of shoulder and back > Flashcards

Muscles of shoulder and back Flashcards

1
Q

What is the function of pectoralis major?

A

Adducts, medialoly rotates and stansversely adducts arm at glenohumeral joint

Depresses shoulder girdle at acromioclavicular and sternoclavicular joints

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2
Q

What is the origin and insertion of pectoralis major?

A

Origin: Sternal and clavicular heads

Insertion to the crest of greater tubercle of humerus

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3
Q

WHat innervates the pectoralis major muscle

A

Medial and lateral pectoral nerves (C5-T1)

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4
Q

WHat supplies the pectoralis major with blood

A

Pectoral branches of thoracoacomial artery, branches of thoracic artery

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5
Q

What is the function of pectoralis minor?

A

Protracts and downwardly rotates shoulder girdle at actromioclavicular and sternoclavicular joints

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6
Q

What are the origins and insertions of pectoralis minor?

A

Origins: Anterior ends of 3rd to 5th ribs

Insertion: coracoid process of scapula

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7
Q

What are the innervation of pectoralis minor?

A

Medial and lateral pectoral nerves (C5 to T1)

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8
Q

What supplies blood to pectoralis minor?

A

Pectoral and deltoid branches of thoracoacromial artery, superior and lateral thoracic arteries

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9
Q

What are the origins/insertion of the deltoid muscle?

A

Origin: Lateral 1/3 of clavicle: Acromion and spine of scapula

Insertion: Deltoid tuberosity of humerus

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10
Q

What is the function of the deltoid?

A

Abducts, flexes, extends, medially rotates and laterally rotates arm at glenohumeral joint

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11
Q

What innervates the deltoid

A

Axillary nerve (C5-C6)

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12
Q

What provides arterial supply to the deltoid

A

Acromial and deltoid brances of the thoracoacromial artery, anterior and posterior circumflex humeral arteries, subscapular artery, deltoid branch of deep brachial artery

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13
Q

What are the origins/insertions of the trapezius muscle

A

Origin: Spinous processes of C7 to T12, External occipital protruberance

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14
Q

What are the actions of the trapezius?

A

Elevates, depresses, retratcs and upwardly rotates pectoral (shoulder girdle) at acromioclavicular and sternoclavicular joints, extends and laterally flexes head and neck

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15
Q

What innervates the trapezius?

A

Accessory nerve, anterior rami of third and fourth cervical nerves

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16
Q

What supplies the trapezius with blood

A

Occipital artery transverse cervical artery, dorsal scapular artery

17
Q

What are the origins/insertions of serratus anterior?

A

Origin: External surfaces of the first to ninth ribs

Insertion: Medial border of scapula

18
Q

What is the action of serratus anterior?

A

Protracts and upwardly rotates the pectoral girdle at acromioclavicular and sternoclavicular joints

19
Q

What innervates serratus anterior?

A

Long thoracic nerve (C5-C7)

20
Q

What supplies serratus anterior with blood?

A

Superior and lateral thoracic arteries, thoracodorsal artery

21
Q

What are the origins/insertions of biceps brachii

A

Origin: Supraglenoid tuberlce of scapula, apex of coracoid process of scapula

Insertion: Radial tuberosity, antebrachial fascia

22
Q

What is the function of the biceps brachii?

A

Flexes forearm at elbow joint, supinates forearm at radioulnar joint

23
Q

What innervates biceps brachii

A

Musculocutaneous nerve (C5-C6)

24
Q

What supplies the biceps brachii with blood

A

Brachial artery, anterior circumflex humeral artery

25
Q

What is the insertion/origin of coracobrachialis?

A

Origin: Coracoid process of scapula,

Insertion: Middle third of medial aspect of humerus

26
Q

What is the function of coracobrachialis?

A

Adducts and flexes arm at glenohumeral joint

27
Q

What innervates coracobrachialis?

A

Musculocutaneous nerve (C5-C7)

28
Q

What supplies coracobrachialis with blood

A

Brachial artery, anterior circumflex humeral artery

29
Q

What are the origins/insertions of brachialis

A

Origin: Anterior aspect of distal humerus,

Insertion: Coracoid process and tuberosity of ulna

30
Q

WHat is the action of the brachialis muscle?

A

Flexes forarm at elbow

31
Q

What innervates the brachialis

A

Musculocutaneous nerve (C5-C6) and radial nerve C7

32
Q

What arteries supply brachialis

A

Brachial artery, radial recurrent artery, superior ulna collateral artery

33
Q

What vein takes blood from the hand?

A

Dorsal venous arch

34
Q

What vein links the lateral upper limb

A

Cephalic vein

35
Q

What vein links the medial upper limb

A

The basilic vein

36
Q

What vein links the cephalic and basilic veins

A

The median cubital arch

37
Q

What does “Running To Dereham Costs Nothing” stand for?

A

Roots, Trunks, Divisions, Cords, Nerves, in reference to the brachial plexus

Anatomy Y1 S2 (12 decks)

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