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ANAT241- Module 3 > Pectoral Girdle and Arm Muscles > Flashcards

Pectoral Girdle and Arm Muscles Flashcards

1
Q

what do the shoulder muscles connect?

A

scapula, clavicle, body wall to the humerus

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2
Q

what is the function of the shoulder muscles?

A

move the shoulder joints

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3
Q

what is the origin of the deltoid muscle?

A

Scapula, clavicle

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4
Q

what is the insertion of the deltoid muscle?

A

Humerus

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5
Q

what innervates the deltoid muscle?

A

axillary nerve

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6
Q

what is the function of the deltoid on the arm?

A

Anterior fibres- flex
Middle fibers- abduct
Posterior fibres- extend

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7
Q

what are the shoulder muscles?

A

deltoid
pectoralis major
latissimus dorsi
teres major

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8
Q

what is the origin of the pectoralis major?

A

Clavicle
sternum
costal cartilages

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9
Q

where does the pectoralis major insert?

A

Humerus

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10
Q

what is the function of the pectoralis major?

A

Flexion, adduction and medial rotation of arm

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11
Q

what is the origin of the latissimus dorsi?

A

spinous processes of the vertebrae, iliac crest, inferior ribs

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12
Q

where does the latissimus dorsi insert?

A

Humerus

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13
Q

what is the function of the latissimus dorsi?

A

Extend, adduct, medially rotate the arm

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14
Q

what is the origin of teres major?

A

inferior angle of the scapula

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15
Q

where is the insertion of the teres major?

A

humerus

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16
Q

what is the function of teres major?

A

Extend, adduct, medially rotate arm

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17
Q

what are the shoulder muscles anterior to posterior?

A

Pectoralis major
Long tendons of biceps
Letissimus dorsi
Teres major

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18
Q

what are the pectoral girdle muscles?

A

Trapezius
Levator scapulae
Rhomboids

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19
Q

what is the origin of the trapezius?

A

occipital bone

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20
Q

where does the trapezius insert?

A

clavicle
- scapula (spine and acromion)

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21
Q

what is the function of the trapezius on the scapula?

A

Superior fibres- elevate
Horizontal fibers- retract
Inferior fibers- depress
Rotation

22
Q

where is the origin of the levator scapulae?

A

Transverse processes of cervical vertebrae

23
Q

where does the levator scapulae insert?

A

Superior angle of scapula

24
Q

what is the function of the levator scapulae?

A

elevate scapula

25
Q

what is the origin of the rhomboids?

A

Spinous processes of the vertebrae

26
Q

where does the rhomboids insert?

A

medial border of the scapula

27
Q

what is the function of the rhomboid?

A

retract scapula

28
Q

what do the rotator cuff muscles connect?

A

the scapular and clavicle to the humerus

29
Q

what is the general function of the rotator cuff muscles?

A

-to support glenohumeral joint
-All rotate humerus, except for supraspinatus

30
Q

where do the rotator cuff muscles attach?

A

Attach to the greater tubercle, except for subscapularis (which attaches to the lesser tubercle)

31
Q

what is the function of the rotator cuff muscles?

A

-Supraspinatus initiates abduction
-Infraspinatus and Teres minor laterally roates the humerus
-subscapularis medially rotates the humerus

32
Q

what are the implications of rotator cuff impingement?

A

Inflammation (tendinitis, bursitis)
Swelling and pain
Impairs movement
Possible rupture of tendons
capsular weakness

33
Q

what is located in the anterior compartment of the arm?

A

-flexors
-Muscles: Biceps brachii, Brachialis, Coracobrachialia
-Nerve: MusculoCutaneous nerve

34
Q

what is located in the posterior compartment of the arm?

A

Extensors
Muscles: triceps brachii
Nerve: radial nerve

35
Q

where is the insertion site of triceps brachii?

A

Olecranon of ulna

36
Q

where is the origin of triceps brachii?

A

Long head: infra glenoid tubercle of scapula
Medial head: humerus
Lateral head: humerus

37
Q

what is the function of triceps brachii?

A

Extend arm and forearm

38
Q

what is the origin of biceps brachii?

A

Long head: supraglenoid tubercle of scapula
Short head: coracoid process

39
Q

what is the insertion of biceps brachii?

A

Radial tuberosity

40
Q

what is the function of biceps brachii?

A

Flex arm and forearm
Supinate forearm

41
Q

what is the origin of the coracobrachialis?

A

Coracoid process

42
Q

where does the coracobrachialis insert?

A

Humerus

43
Q

what is the function of coracobrachialia?

A

Flex arm
Adduct arm

44
Q

what is the origin of brachialis?

A

Humerus

45
Q

what is the insertion site of brachialis?

A

Coronoiud process of Ulna

46
Q

what is the function of Brachialis?

A

Flex forearm

47
Q

what is the brachial artery?

A

-continuation of axillary artery
-runs on medial forearm
-divides into radial and ulnary arteries

48
Q

what are the brachial veins?

A

deep, and run with brachial artery

49
Q

what are the large superficial arm veins?

A

cephalic and basilic veins

50
Q

what crosses between the superficial and deep arm veins?

A

the median cubital vein crosses between them

51
Q

what innervates the anterior arm muscles?

A

Musculocutaneous nerve

52
Q

what innervates the posterior arm muscles?

A

radial nerve

ANAT241- Module 3 (9 decks)

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