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701 Anatomy > Unit 3 Pectoral girdle and shoulder > Flashcards

Unit 3 Pectoral girdle and shoulder Flashcards

1
Q

overview of the upper limb - 4 segments

A

shoulder
arm
forearm
hand

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2
Q

what’s part of the shoulder segment

A

pectoral
scapular
deltoid regions

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3
Q

what’s part of the arm segment

A

also known as brachium
- first segment of free upper limb, between shoulder and elbow

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4
Q

what’s part of the forearm segment

A

also known as antebrachium
- between elbow and wrist

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5
Q

whats part of the hand segment

A

also called manus
- includes the wrist, palm, dorsal of the hand and digits

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6
Q

what is your pectoral made of and the characteristics of it

A
  • made of clavicle and scapula
  • incomplete ring
  • mobility of scapula allows for free movement of UL
  • clavicle = strut
  • joints include articulations of the clavicle: sternoclavicular and acromioclavicular
  • contrast the pectoral and pelvic girdles
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7
Q

what articulates with the clavicle

A

sterncolavicular and acromioclavicular

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8
Q

characteristics of the sternoclavicular joint

A
  • strong, mobile
  • synovial, saddle joint
    -sternal end of clavicle with manubrium and 1st costal cartilage
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9
Q

sternoclavicular joint is strengthened by

A
  • anterior/posterior sternoclavicular lig.
  • costoclavicular lig
  • interclavicular lig
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10
Q

blood supply to the sternoclavicular joint

A

internal thoracic and branches of thyrocervical trunk
- axillary artery

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11
Q

innervation to sternoclavicular joint

A

medial supraclavicular nerve (mostly cutaneous) and nerve to subclavius

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12
Q

nerve to subclavius

A

C5-C6

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13
Q

most common dislocation for SC (posterior or anterior)

A

anterior

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14
Q

subclavius muscle main purpose is to? origin, insertion, etc

A

steady the clavicle in the SC joint
O: first rib
I: inferior surface of clavicle
Inn: nerve to subclavius
Blood: thoracoacromial artery (clavicular branch)

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15
Q

characteristics of acromioclaviuclar joint (AC)

A

-synovia, plane joint
- acromion of scapula and acromial end of clavicle
- movement of scapula

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16
Q

what strengthened the acromioclavicular joint

A

joint is strengthen by extrinsic ligaments
- coracoclavicular ligament: conoid ligament, trapezoid ligament
- acromioclavicular ligament

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17
Q

main purpose of coracoclavicular ligament? its made up of?

A
  • anchor the clavicle to the coracoid process
  • made up of conoid ligament and trapezoid ligament
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18
Q

what is the blood supply to AC joint

A

supra scapular and thoracoacromial arteries

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19
Q

nerve innervation of AC joint

A

lateral pectoral and axillary nerves

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20
Q

coracoacromial arch is made of

A
  • made by the coracoacromial ligament
  • subacromial bursa in subacromial space
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21
Q

where is the site of bursitis and shoulder impingement ?

A

subacromial bursa in subacromial space

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22
Q

what is most needed for activities when arm is overhead?

A

subacromial bursa

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23
Q

characteristics of glenohumeral joint

A
  • synovial, ball and socket joint
  • very mobile, less stable
  • loose, fibrous joint capsule
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24
Q

humeral head of glenohumeral joint articulates with?

and 1/3 of its head sits?

A

1) glenoid cavity
2) sits in the vanity due to glenoid labrum

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25
Q

the loose, fibrous joint capsule of glenohumeral joint allows?

A

-opening for tendon of long head of biceps brachia
- opening inferior to coracoid process, communication between bursa and synovial membrane

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26
Q

blood supply for glenohumeral joint

A

anterior and posterior humeral circumflex arteries and branches of suprascapular artery

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27
Q

nerve innervation of glenohumeral joint

A

suprascapular nerve, axillary nerve, lateral pectoral nerve

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28
Q

the axillary nerve may be injured in a shoulder dislocation. How would you know if this nerve is injured?

A

weakness contraction of deltoid (numbness)

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29
Q

rotator cuff muscles

A

SITS
supraspinatus
infraspinatus
teres minor
subscapularis

30
Q

what is supported by the rotator cuff muscles

A

glenohumeral joint capsule

31
Q

what muscles attach to the scapula and humerus?

A

scapulohumeral muscles

32
Q

true or false: your labrum gets a good amount of blood supply?

A

false; little blood supply

33
Q

of the rotator cuff muscles, which one is the most likely to get a strain?

A

subscapularis

34
Q

true or false: glenoid labrum help decrease surface area?

A

false: increase of surface area

35
Q

supraspinatus

A

O: supraspinous fossa
I:greater tubercle of humerus
- abducts the arm 0-15 degree
Inn: suprascaupar nerve

36
Q

infraspinatus

A

O: infraspinous fossa
I: Greater tubercle of humerus
- ER
Inn: suprascapular nerve

37
Q

teres minor

A

O: lateral border of scapula
I: greater tubercle of humerus
- ER, some adduction
Inn: axillary nerve

38
Q

subscapularis

A

O: subscapular fossa
I: lesser tubercle of humerus
- IR
- upper and lower sub scapular nerves

39
Q

medial rotation of the upper limb muscles

A

-subscapularis
-pectoralis major
- teres major
- latissimus dorsi

40
Q

what innervates subscapularis

A

upper and lower subscaupular nerves

41
Q

what innervates pectoralis major

A

medial and lateral pectoral nerves

42
Q

what innervates teres major

A

lower subscapular nerve

43
Q

what innervate latissimus dorsi

A

thoracodorsal nerve

44
Q

lateral rotation of upper limb muscles

A

infraspinatus and teres minor

45
Q

what innervates infraspinatus

A

suprascapular nerve

46
Q

what innervates teres minor

A

axillary nerve

47
Q

scapulohumeral muscles

A

-attachments are at the scapula and humerus
- include the rotator cuff muscles

48
Q

deltoid

A

O: lateral 1/3 of clavicle, acromion and scapular spine
I: Deltoid tuberosity of humerus
Inn: axillary nerve

49
Q

clavicular portion of deltoid -actions

A

flexion
IR
adduction

50
Q

acromial portion of deltoid - action

A

abduction

51
Q

spinous portion of deltoid - actions

A

extension
ER
adduction

52
Q

teres major

A

O: posterior surface of interior angle of scapula
I:crest of lesser tubercle of humerus
A: adducts, internally rotates and extends arm
Inn: lower subscapular nerve

53
Q

abduction of the upper limb 0-15degree

A

supraspinatrus (suprascapular nerve)

54
Q

abduction of the upper limb 15-90 degree

A

deltoid (axillary nerve)

55
Q

abduction of the upper limb 90-160 degree

A

trapezius (CN11)

56
Q

abduction of the upper limb 160-180degree

A

seratus anterior (long thoracic nerve)

57
Q

axillary nerve - motor innervation

A

deltoid muscle
teres minor
lateral head of triceps brachii

58
Q

axillary nerve - sensory

A

glenohumeral joint
skin of the shoulder region

59
Q

muscles attaching the clavicle

A

pectoralis major
upper trapezius
anterior portion of deltoid
sternocleidomastoid
subclavius

60
Q

muscles attaching anterior scapula

A

pectoralis major
subscapularis
serratus anterior
biceps brachii - short
coracobrachialis

61
Q

muscles attaching posterior scapula

A

levator scapula
rhomboid major/minor
trapezius
deltoid - acromial/spinous part
supraspinatus
infraspinatus
teres major/minor
latissimus dorsi -scapular portion
triceps brachii-long

62
Q

movements of the shoulder (glenohumeral joint)

A

flexion/extension
adduction/abudction
internal/external rotation

63
Q

movement of the scapula (scapulothoracic joint)

A

elevation/depression
protraction/retraction
upward/downward rotation

64
Q

lateral and posterior of shoulder pain results in which nerve?

A

axillary nerve

65
Q

name the three spaces of posterior shoulder

A

quadrangular space
triangular space
triceps hiatus

66
Q

what comes out from the quadrangular space

A

-axillary nerve
-posterior humeral circumflex artery

67
Q

what comes out from triangular space

A

circumflex scapular artery

68
Q

what comes out of triceps hiatus

A
  • radial nerve
  • deep brachial artery
69
Q

triangle of auscultation boundaries

A
  • latissimus dorsi (inferior)
  • trapezius (superior)
  • rhomboid major (lateral)
    good place to listen for breath sounds
70
Q

you can have a scapular foramen if this ligament becomes ossified

A

superior transverse scapular ligament

701 Anatomy (18 decks)

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