Shoulder Lecture Flashcards Preview

Human Anatomy 1 -- Zach H. > Shoulder Lecture > Flashcards

Flashcards in Shoulder Lecture Deck (39):
1

What are the 3 types of fibrous, solid joints? 

  • sutures 
  • syndesmoses 
  • gomphoses 

2

What are the different types of cartilagenous, solid joints? 

  • synchondroses 
  • symphyses 

3

True or False: 

Most joints in the body are synovial joints? 

True 

4

What are the characteristics of a synovial joint?

  • joint capsule 
    • inner synovial membrane 
    • outer fibrous capsule 
  • hyaline carilage 
  • some have articular disc 
  • typically very mobile 

5

Do snyarthrosis joints have any movement? 

NO

6

Which type of joint has little movement ?

a) synarthrosis     

b) amphiarthrosis 

c) diarthrosis         

b) amphiarthrosis

7

Do diarthrosis joints have axial movement? 

NO, they are non-axial movement joints. (most synovial joints)

8

What type of joint are most synovial joints? 

a) synarthrosis

b) amphiarthrosis 

c) diarthrosis

c) diarthrosis 

9

What muscle groups are considered "shoulder muscles"? 

Axioappendicular = connect the axial skeleton to the upper arm

  • anterior structures part of pectoral region
  • posterior structures part to back region (specifically hypaxial since they act on the limbs)

Scapulohumeral = connect the scapula to the humerus

10

Shoulder Joint (glenohumeral joint)

  • synovial joint
  • diarthrotic
  • multiaxial 
  • ball and socket ("cup and saucer")

11

Which two ligaments make up the coracoclavicular ligament? 

  • trapezoid ligament 
  • conoid ligament 

12

Between which two tendons is the subacromial bursa locate? 

between acromion and supraspinatus tendon

13

Between what join and muscle is the subdeltoid bursa located?

between deltoid muscle and joint capsule 

14

What is the subcoracoid bursa found located between? 

between subscapularis muscle and coracoid process....may be fused with subscapular bursa

15

Where is the subscapular bursa found located in-between? Also, can it communicate with the synovial cavity of joint?

between subscapularis muscle and joint capsule, communicates with synovial cavity of joint

16

True or False: 

The subacromial bursa, subdeltoid bursa, and asubcoracoid bursa may communicate with each other, but not with the synovial cavity of the glenohumeral joint. 

True 

17

What can cause impingement syndrome of the shoulder? 

  • supraspinatus tendon (tendonitis)
  • can involve subacromial bursa (bursitis)

18

Which muscles attach the scapula to the humerus? 

  • deltoid 
  • teres major
  • rotator cuff muscles 
    • subscapularis 
    • supraspinatus 
    • infraspinatus 
    • teres minor 

19

Fill in the Blank: 

Scapulohumeral muscles _____ on the scapula and _____ to the humerus.

originate; attach 

20

What are the muscles that attach the scapula to the humerus called? 

scapulohumeral muscles 

21

What is the proximal/distal attachment, actions, innervation, and blood supply to the deltoid?

Proximal Attachment: 

  • lateral 1/3 of clavicle 
  • acromion of scapula 
  • spine of scapula 

Distal Attachment: 

  • deltoid tuberosity of humerus 

Actions: 

  • flexes humerus 
  • medially rotates humerus 
  • abducts humerus 
  • extends humerus 
  • laterally rotates humerus 

Innervation:

  • axillary nerve 

Blood Supply:

  • posterior circumflex humeral artery
  • thoracoacromial artery (branches from axillary artery) 

 

22

Which division of the brachial plexus does the axillary nerve come off of? 

posterior division of brachial plexus 

23

What is the proximal/distal attachment, actions, innervation, and blood supply of the teres major muscle? 

Proximal Attachment

  • posterior surface of inferior angle of scapula 

Distal Attachment:

  • medial lip of intertubercular (bicipital) groove of humerus

Actions: 

  • adducts humerus 
  • medially rotates humerus 

Innervation: 

  • lower subscapular nerve 

Blood Supply: 

  • subscapular artery
  • circumflex scapular arteries 

24

Which division of the brachial plexus does the lower subscapular nerve arise from? 

Posterior Division 

25

What is the proximal/distal attachments, actions, innervation, and blood supply to the supraspinatus? 

Proximal Attachment: 

  • supraspinous fossa of scapula 

Distal Attachment: 

  • superior facet of greater tubercle of humerus 

Actions: 

  • works with deloid in abduction of humerus
  • acts with other rotator cuff muscles in stabilizing shoulder joint

Innervation:

  • suprascapular nerve 

Blood Supply: 

  • Suprascapular artery

26

Which division of the brachial plexus does the suprascapular nerve arise? 

anterior division 

27

What is the proximal/distal attachments, actions, innervation, and blood supply of the subscapularis? 

Proximal Attachment: 

  • subscapular fossa (anterior surface of scapula)

Distal Attachment: 

  • lesser tubercle of humerus 

Actions: 

  • medially rotates humerus 
  • adducts humerus 
  • helps hold humeral head in place 

Innervation:

  • upper subscapular nerve 
  • lower subscapular nerve 

Blood Supply:

  • subscapular artery 

28

Which division off of the brachial plexus does the upper and lower subscapular nerves arise? 

posterior division 

29

What is the proximal/distal attachments, actions, innervation, and blood supply of the infraspinatus muscle? 

Proximal Attachment: 

  • infraspinous fossa of scapula

Distal Attachment: 

  • middle facet of greater tubercle of humerus 

Actions: 

  • laterally rotates humerus
  • helps hold humeral head in place 

Innervation: 

  • suprascapular nerve 

Blood Supply:

  • suprascapular artery
  • circumflex scapular artery

30

Which rotator cuff muscles is the largest and strongest? 

Subscapularis 

31

What can subscarpularis injuries lead to? 

Bicipital tendon instability and biceps tendonitis (because of tranverse humeral ligament). 

32

Which division of the brachial plexus does the suprascapular nerve arise from? 

anterior division 

33

What is the proximal/distal attachments, actions, innervation, and blood supply of the teres minor muscle? 

Proximal Attachment: 

  • middle part of lateral border of scapula 

Distal Attachment: 

  • inferior facet of greater tubercle of humerus 

Actions: 

  • laterally rotates humerus
  • helps hold humeral head in place 

Innervation: 

  • axillary nerve 

Blood Supply: 

  • subscapular artery
  • circumflex scapular artery 

34

What are the 4 named spaces and triangles of the superficial back (posterior axio-appendicular) and scapular regions (scapulohumeral)? 

  1. triangle of auscultation 
  2. quadrangular space 
  3. triangular space 
  4. triangular interval 

35

What is important about the trangle of auscultation? 

Physician can listen for breath sounds because there's less tissue in the way in the triangle of auscultation. 

36

What nerve and artery are found in the quadrangular space? 

  • axillary nerve 
  • posterior circumflex humeral artery

37

What artery is found in the triangular space? 

circumflex scapular artery 

38

What nerve and artery is found in the triangular interval? 

  • deep brachial artery 
  • radial nerve 

39