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a7 kin > Exam 2- shoulder > Flashcards

Exam 2- shoulder Flashcards

1
Q

what are the 4 articulation of the shoulder

A
  • Glenohumeral joint
  • Acromioclavicular joint
  • Sternoclavicular joint
  • Scapulothoracic joint
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2
Q

what bones make up the schoulder

A
  • sterum
  • clavicial
  • scap
  • humerous
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3
Q

what are some bony structures of the sterum

A
  • manubrium
  • clavicular facest
  • body
  • costal faceets
  • xiphoid provess
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4
Q

what are some feature of the clavicle shaft

A
  • it has a curved shaft
  • Medially - convex
  • laterally- concave
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5
Q

what is the orientation of the clavicle

A
  • slightly above horizontal

- ~20 degrees posteriro to the frontal plane

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6
Q

what are the important structure of the scapula

A
  • 3 angles
  • 3 borders
  • anterior surface
  • posterior surface
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7
Q

what are the 3 angles of the scapula

A
  • inferior
  • superiro
  • lateral
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8
Q

what are the 3 borders of the scapula

A
  • medial
  • axillary
  • subscapular
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9
Q

what is in the anterior of the scap

A

subscapular fossa

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10
Q

what is in the posterior of the scap

A
  • supraspinatus fossa
  • infraspinatus fossa
  • spine
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11
Q

what does the scap articulat with

A

humerus at the glenoid fossa and the posterolateral thorax

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12
Q

what are the motions of the glenoid fossa

A

4 degrees upward

35 degrees anteriorly

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13
Q

so what does the scapula lay on

A

the scapular plane

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14
Q

what are some bony process of the scapula

A
  • supra/ infra glenoid trubercles
  • corocoid process
  • acromion
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15
Q

what shape is the head of the humerous

A

convex head

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16
Q

what is the angle of inclination of the humerous

A

135 degrees

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17
Q

what is the retroversion of the humerous

A

30 degrees

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18
Q

what are some bony spot on the top half of the humerous

A 
anatomic neck
crests
deltoid tuberosity 
lesser tub
greater tub 
radial groove
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19
Q

what are the joints that need to be considered with shoulder movement

A

SC, AC, ST, GH

    • fx as a series of kinematic links
    • ALL must work together
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20
Q

what is the scapulohumeral rhytm of shoulder abduction

A

2: 1 for every 3 degrees

- -180 degrees = GH( 120 degrees) + St (60 degrees)

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21
Q

what degree is the scapular path in shoulder abduction

A

60 degrees

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22
Q

what makes up the 60 degrees of the scapular path in shoulder abduction

A

AC x SC = 60 degrees

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23
Q

how much does the clavicle retract in shoulder abduction

A

15 degrees

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24
Q

How does the shoulder tilt and rotate when in abduction

A

There will be posterior tilt and external rotation and this will be determined by AC x SC

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25
Q

How will the clavicle rotate when the shoulder is abducted

A

20 – 35 degrees in rotating at the Ac joint

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26
Q

How will the humerus rotate when the shoulder is abducted

A

It will externally rotate at about 45 degrees

-Greater tubercle vs acromion

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27
Q

What way would abduction arthrokinematics roll and slide with convex on concave rule

A

Superior roll

Inferior slide

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28
Q

What makes up the sternoclavicular joint

A
  • Medial end of clavicle e
  • Sternal clavicular facet
  • Superior border of the first rib
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29
Q

What is the fx of the ( basilar joint) sternoclavicular

A

Links the appendicular skeleton with the axial skeleton

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30
Q

What type of joint is the sternoclavicular joint

A

Saddle joint

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31
Q

What makes up the joint capsule of the SC

A

Anterior SC ligament

Posterior SC ligament

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32
Q

What are some other connective tissue of the SC joint

A
  • Interclavicular lig
  • Costoclavicular lig
  • Articular disc
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33
Q

What are some active stabilizers of the SC joint

A
  • Anterior: SCM
  • Posterior: sternothyroid + sternohyoid
  • Inferior: subclavius
34
Q

What plane is the SC joint

A
  • Frontal plane
35
Q

What is the SC joint shaped like

A
  • Saddle joint

- Reciprocally shaped, slightly convex and concave surfaces

36
Q

What are the clavicle osteokinematics

A
  • 3 degrees of freedom and rotates in all 3 cardinal planes

- Optimize scapular position for the head of the humerus

37
Q

What rolls and slides during elevation of the SC joint

A

Convex on concave rule

  • Superior roll
  • Inferior slide
38
Q

What rolls and slides during depression of the SC joint

A

Convex on concave rule

  • Inferior roll
  • Superior slide
39
Q

What rolls and slides during retraction of the SC joint

A

Concave on convex

—Rolls and slides posterior

40
Q

What rolls and slides during protraction of the SC joint

A

Concave on convex

- Rolls and slides anterior

41
Q

What makes up the acromioclavicular joint

A
  • Lateral end of clavicle

- Acromion of scapula

42
Q

What makes up the acromioclavicular joint

A
  • Lateral end of clavicle

- Acromion of scapula

43
Q

What type of joint is the AC joint

A

Plane

44
Q

What are some AC joints connective tissues

A
  • Superior / inferiror ligaments

- Joint capsule

45
Q

What are some active stabilizer of the AC joint

A
  • Deltoid

- Upper trapezius

46
Q

What is an extrinsic stabilizer of the AC joint

A
  • Coracoclavicular lig
47
Q

What makes up the coracoclavicular lig

A
  • Trapezoid

- Conoid

48
Q

How is the AC joint motion described by

A

The movement of the scapula relative to the lateral end of the clavicle

49
Q

What does the SC joint do to help the AC joint

A

Guides the clavicle and general path of the scapula

50
Q

What does the AC joint do for the scap and the thorax

A

Optimizes mobility and fit between scapula and thorax

51
Q

What are the 3 degrees of freedom of the AC joint

A
  • Frontal plane ( AP axis)
  • Horizontal plane (vertical axis)
  • Sagittal plane (medial- lateral axis)
52
Q

What are the primary motions of the ST joint

A
  • Elevation / depression
  • Protraction / retraction
  • Upward/ downward rotation
53
Q

How does the scapulothoracic joint moving in protraction and retraction

A

Scapula follows the protracting / retracting clavicle

54
Q

What does the ST joint rotates

A

Horizontal plane rotations

55
Q

What is the equation for ST joint movement in protraction and retraction

A
  • SC + AC = ST protraction/ retraction
56
Q

How does the ST joint move in elevation and depression

A

Scapula follows the elvating clavicles

57
Q

What is the equation of the ST joint movement in the elevation and depression

A
  • SC + AC = ST elevation / depression
58
Q

How does the ST joint move in upward and downward rotation

A
  • Scapula follows the elevation clavicle
59
Q

What is the equation of the ST joint in upward and downward rotation

A

SC + AC = ST upward/ downward rotations

60
Q

How does the GH joint roll and slide

A

Convex on concave rule

  • Superior roll
  • Inferior slide
61
Q

What is the fibrous capsule of the GH joint

A

Glenoid fossa rim- neck of humerus

62
Q

What are the GH capsular ligament

A 
Ant/ inf capsular walls
-	Superior GH Lig
-	Anteriro GH lig 
-	Inferior GH Lig  ( 3 bands )
Coracohumeral lig
63
Q

What are the dynamic stabilizers of the GH joint

A

Rotator cuff

64
Q

What is the arthrokinematics of the GH joint

A

Convex on concave

65
Q

How many degrees of abd at the GH joint

A

120 degrees

66
Q

How many degrees of upward rotation at the GH joint

A

60 degrees

67
Q

What are some ligaments/ muscles of the capsular of the GH joint

A
  • supraspinatus
  • Superior capsular ligament
  • Inferior capsular ligament
68
Q

Stopped at slide

A

33

69
Q

what is the Convex on Concave rule

A

joint will roll and slide in opposite directions

70
Q

what is the Concave on Convex rule

A

joint will roll and slide in the same direction

71
Q

what is the GH joint like

A

a golf ball on a t

72
Q

what are the 2 fx of the shoulder muscles

A
  • proximal stabilizers

- distal mobilizers

73
Q

what are some scapular retractors

A
  • middle trap
  • rhomboids
  • lower trap
74
Q

why do you need retractors muscles of the GH

A

keep the scap retracted when doing movement like extension of the arm

75
Q

what are the scapular elevators

A
  • Upper Trapezius
  • Levator Scapulae
  • Rhomboids
76
Q

what do the scapular elevators do

A

Support shoulder girdle posture

77
Q

what are the upward rotators of the scapula

A
  • Serratus Anterior
  • Upper Trapezius
  • Lower Trapezius
  • Middle Trapezius (stabilizer)
78
Q

what does the upward rotators of the scap do

A

helps with lifting your arm

79
Q

what are the rotator cuff muscles

A
  • supraspinatus
  • infraspinatur
  • teres minor
  • subscapularis
80
Q

stopped at

A

slide 39ish

a7 kin (1 decks)

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