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Anatomy Lab > Muscles Week 9 > Flashcards

Muscles Week 9 Flashcards

1
Q

What is the origin of the Teres Major?

A

Inferior, lateral border of scapula

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2
Q

What is the insertion of the Teres Major?

A

Medial lip of bicipital groove of humerus (medial to latissimus)

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3
Q

What is the action of the Teres Major?

A

Medial rotation and adduction of shoulder

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4
Q

What nerve innervates the Teres Major?

A

Lower subscapular nerve

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5
Q

What is the origin of the Serratus Anterior?

A

Ribs 1-9 (lateral surface)

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6
Q

What is the insertion of the Serratus Anterior?

A

Anterior medial border of scapula

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7
Q

What is the action of the Serratus Anterior?

A

Protraction (abduction) and upward rotation of scapula

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8
Q

What nerve innervates the Serratus Anterior?

A

Long thoracic nerve

Winging of scapula can occur if long thoracic nerve is damaged.

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9
Q

What is the origin of the pectoralis major?

A

Clavicular fibers: medial ½ of clavicle; sternal fibers: anterior sternum; costal fibers: costal cartilage of ribs 1-7

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10
Q

Where does the pectoralis major insert?

A

Lateral lip of bicipital groove of humerus

“a lady between 2 majors”

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11
Q

What is the action of the pectoralis major?

A

Adduction and medial rotation of shoulder; horizontal adduction of shoulder

Also used in push-ups, bench press, throwing

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12
Q

What nerves innervate the pectoralis major?

A

Medial and lateral pectoral nerves

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13
Q

What is the origin of the coracobrachialis?

A

Coracoid process of scapula

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14
Q

Where does the coracobrachialis insert?

A

Medial shaft of humerus (middle 1/3)

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15
Q

What are the actions of the coracobrachialis?

A

Flexion and adduction of shoulder

Horizontal adduction of shoulder

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16
Q

What is the innervation of the coracobrachialis?

A

Musculocutaneous nerve

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17
Q

Which muscles attach to the coracoid process?

A

Short head of biceps, coracobrachialis, and pectoralis minor

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18
Q

What is the origin of the long head of the Biceps Brachii?

A

Supraglenoid tubercle and glenohumeral labrum

19
Q

What is the origin of the short head of the Biceps Brachii?

A

Coracoid process of scapula

20
Q

Where does the Biceps Brachii insert?

A

Radial tuberosity and bicipital aponeurosis

21
Q

What actions does the Biceps Brachii perform?

A

Flexion and supination of elbow; flexion of shoulder

22
Q

What is the innervation of the Biceps Brachii?

A

Musculocutaneous nerve

23
Q

What is the origin of the Brachialis?

A

Anterior distal ½ of humerus

24
Q

What is the insertion of the Brachialis?

A

Ulnar tuberosity and coronoid process of ulna

25
Q

What is the action of the Brachialis?

A

Flexion of elbow (main elbow flexor)

26
Q

What is the innervation of the Brachialis?

A

Musculocutaneous and radial nerve

27
Q

What is the origin of the long head of the Triceps Brachii?

A

Infraglenoid tubercle and neck of scapula

28
Q

What is the origin of the lateral head of the Triceps Brachii?

A

Upper half of posterior surface of shaft of humerus (above radial groove)

29
Q

What is the origin of the deep (medial) head of the Triceps Brachii?

A

Posterior shaft of humerus (below radial groove)

30
Q

Where does the Triceps Brachii insert?

A

Olecranon process

31
Q

What is the action of the Triceps Brachii?

A

Extension of elbow

32
Q

What is the innervation of the Triceps Brachii?

A

Radial nerve (axillary nerve - long head)

33
Q

What is the origin of the Brachioradialis?

A

Lateral supracondylar ridge of humerus

34
Q

What is the insertion of the Brachioradialis?

A

Styloid process of radius

35
Q

What is the action of the Brachioradialis?

A

Flexion of elbow (pronation of forearm when supinated, supination of forearm when pronated)

36
Q

What is the innervation of the Brachioradialis?

A

Radial nerve

37
Q
A

Teres major

38
Q
A

Serratus Anterior

39
Q
A

Pectoralis Major

40
Q
A

Coracobrachialis

41
Q
A

Biceps Brachii

42
Q
A

Brachialis

43
Q
A

Triceps Brachii

44
Q
A

FYI Brachioradialis

Anatomy Lab (18 decks)

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