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5/20 - 5/21: Axilla and Brachial Plexus > 5/20 - 5/21: Axilla and Brachial Plexus > Flashcards

5/20 - 5/21: Axilla and Brachial Plexus Flashcards

1
Q

What is the insertion of the pectoralis major?

A

Humerus (crest of greater tuberosity)

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2
Q

What is the innervation of the pectoralis major?

A

Medial and lateral pectoral n. (C5-T1)

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3
Q

What is the action of the pectoralis major?

A

Entire muscle: Adduction, internal rotation

Clavicular and sternocostal parts: flexion; assist in respiration when shoulder is fixed

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4
Q

What is the origin of the pectoralis minor?

A

3rd-5th ribs

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5
Q

what is the insertion of the pectoralis minor?

A

coracoid process

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6
Q

what is the innervation of the pectoralis minor?

A

medial pectoral n. (C8, T1)

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7
Q

What is the action of the pectoralis minor?

A

anterior tilt, protracts scapula, depresses scapula when elevated

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8
Q

What is the origin of the serratus anterior (serratus part, intermediate part, inferior part)?

A

1st-9th ribs

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9
Q

What is the insertion of the serratus anterior (superior part, intermediate part, inferior part)?

A

Scapula (medial border)

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10
Q

What is the innervation of the serratus anterior (superior, intermediate, and inferior part)

A

Long thoracic n. (C5-C7)

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11
Q

What is the action of the serratus anterior superior part?

A

adducts the arm

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12
Q

What is the action of the serratus anterior intermediate part?

A

Entire muscle: Draws scapula laterally forward; elevates ribs when shoulder is fixed

Protracts scapula

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13
Q

What is the action of the serratus anterior inferior part?

A

Protracts scapula

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14
Q

What is the origin of the subclavius?

A

1st rib

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15
Q

What is the insertion of the subclavius?

A

Clavicle (inferior surface)

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16
Q

What is the innervation of the subclavius?

A

N. to subclavius (C5, C6)

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17
Q

What is the action of the subclavius?

A

Steadies the clavicle in the sternoclavicular joint

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18
Q

What is the origin of the deltoid clavicular part?

A

lateral one third of clavicle

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19
Q

what is the insertion of the deltoid?

A

humerus (deltoid tuberosity)

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20
Q

What is the innervation of the deltoid?

A

Axillary n. (C5,C6)

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21
Q

What is the action of the deltoid, clavicular part?

A

Flexion, internal rotation, adduction.

22
Q

What is the origin of the deltoid acromial part?

23
Q

What is the action of the deltoid acromial part?

24
Q

What is the origin of the deltoid spinal part?

A

scapular spine

25
Q

What is the action of the deltoid spinal part?

A

extension, external rotation, adduction

26
Q

What is the origin of the latissimus dorsi?

A

Iliac crest, 9th-12th ribs, Scapula (inferior angle), spinous process of T7-T12 vertebrae; thoracolumbar fascia

27
Q

What is the insertion of the latissimus dorsi?

A

Floor of the intertuberculargroove of the humerus

28
Q

What is the innervation of the latissimus dorsi?

A

Thoracodorsal n. (C6-C8)

29
Q

What is the action of the latissimus dorsi?

A

Internal rotation, adduction, extension, respiration

30
Q

What is the origin of the sternocleidomastoid sternal head?

A

sternum (manubrium)

31
Q

What is the insertion of the sternocleidomastoid?

A

Temporal bone (mastoid process), Occipital bone (superior nuchal line)

32
Q

What is the innervation of the sternocleidomastoid?

A

Motor: Accessory n. (CN XI)

Pain and Proprioception: Cervical plexus (C2, C3)

33
Q

What is the action of the sternocleidomastoid?

A

Unilaterally: Tilts head to same side, rotates head to opposite side

Bilateral: Extends head, aids in respiration when head is fixed

34
Q

What is the origin of the pectoralis major?

A

Clavicular part: Clavicle (medial half)
Sternocostal part: sternum and costal cartilages 1-6
Abdominal part: rectus sheath (anterior layer)

35
Q

What is the origin of the sternocleidomastoid clavicular head?

A

Clavicle (medial one third)

36
Q

What is the origin of the anterior scalene?

A

C3-C6 (anterior tubercles of transverse processes)

37
Q

What is the insertion of the anterior scalene?

A

1st rib (scalene tubercle)

38
Q

What is the origin of the middle scalene?

A

C1-C2 (transverse processes),

C3-C7 (posterior tubercles of transverse processes)

39
Q

What is the insertion of the middle scalene?

A

1st rib (posterior to groove for subclavian artery)

40
Q

What is the origin of the posterior scalene?

A

C5-C7 (posterior tubercles of transverse processes)

41
Q

What is the insertion of the posterior scalene?

A

2nd rib (outer surface)

42
Q

What is the innervation of the scalenes?

A

Direct branches from cervical and brachial plexuses (C3-C8)

43
Q

What is the action of the scalenes?

A

With ribs mobileElevates upper ribs (during forced inspiration)

With ribs fixed: Bends cervical spine to same side (Unilateral), Flexes neck (bilateral)

44
Q

What is the origin of the omohyoid?

A

Superior border of the scapula

45
Q

insertion of omohyoid?

A

hyoid bone

46
Q

innervation of omohyoid?

A

ansa cervicalis of cervical plexus (C1-C3)

47
Q

action of omohyoid?

A

depresses hyoid and larynx (for phonation and terminal phases of swallowing)

48
Q

What is the insertion of the omohyoid?

A

Hyoid bone

49
Q

What is the innervation of the omohyoid?

A

Ansa cervicalis of cervical plexus (C1-C3)

50
Q

What are the actions of the omohyoid?

A

Depresses hyoid and larynx (for phonation and terminal phases of swallowing)

5/20 - 5/21: Axilla and Brachial Plexus (1 decks)

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