mod 3 shoulder

Question 1

what is the biggest stabalizer of the scapulo thoracic jt

Answer 1

biggest stabalizer is the traps

Question 2

3 motions of sc joint

Answer 2

1. elevation/depression
2. rot of the clavicle
3. protraction/retraction

(all relative to lat end)

Question 3

what is the axis of rot in elevation/depression

Answer 3

costoclavicular lig

Question 4

as the clavical elevates what happens in rot

Answer 4

costoclavicular lig becomes taut and coracoclavicular lig making it roll post

Question 5

function of the costoclavicular lig (2)

Answer 5

1. checks sup glide

2. creates a pivot point for protraction/retraction

Question 6

function of AC jt (2)

Answer 6

1. maintain relation bw scap and clavical

2. provide 30 degrees extra rot in abduc

Question 7

what direction does hurmeral head go

Answer 7

medial sup post

Question 8

how much is the humeral head retroverted

Answer 8

30 degrees post

Question 9

how big is the GHJ capsul and how much distraction does it allow for

Answer 9

twice the size of humerall head

allows for 1inch distraction

Question 10

GH ligs- where is it strongest and what is closed pack

Answer 10

strong sup

abd and ext rot

Question 11

what does the coracohumeral lig check against

Answer 11

external rot

Question 12

why is there more ext rot in abducted pos compared to pendent

Answer 12

impact of lesser tubercle w int rot

Question 13

why is there more int rot in abducted pos

Answer 13

impact of greater tub on ac

Question 14

what keeps your arm from subluxing inf (3)

Answer 14

1. sup capsul j
2. coracohumeral lig
3. passive tension in surpraspinatus

Question 15

when the deltoid is paralazed abduction strength is decreased by how much at 0 and how much at 150

Answer 15

0- -35

150- 60-80

Question 16

if trap is paralyzed abduction ROM is decreased to

Answer 16

75degrees

Question 17

what happens in type 1 GH degredation

Answer 17

balding of humeral head
rounding of greater tubercle + bicipital groove
thinnijng acromion

Question 18

GH:scapular motion ratio

Answer 18

2 degrees GH for 1 degree scap rot

Question 19

is arm abduction what moves the 1st middle and last sections

Answer 19

30- Gh
middle- 1:1
last- scapulothoracic

Question 20

What happens to the AIGHL and PIGHL in throwing athletes

Answer 20

AIGHL- becomes lax
PIGHL- contracture (helps not pinch rotator)

loose some int rot

Question 21

what are negatives to throwing athletes (in extreme external rot)

Answer 21

peel back on biceps tendon

ant capsul becomes lax

Question 22

Grade 1,2,3 of AC joint seperations

Answer 22

1- slight tearing all in tact tho

2. ripping atleast thru one, step defect present
3. ripping thru all 3 ligs