shoulder (kinematics + scapulohumeral rhythm)

Question 1

osteokinematics of elevation (sc joint)

Answer 1

30-45 deg

Question 2

arthrokinematics of elevation (sc joint)

Answer 2

roll: superiorly
slide: inferiorly

Question 3

plane and axis of elevation and depression

Answer 3

frontal plane, z axis

Question 4

osteokinematics of depression (sc joint)

Answer 4

from resting position, 5-10 deg

Question 5

arthrokinematics of depression (sc joint)

Answer 5

roll: inferior
slide: superior

Question 6

retraction osteokinematics (sc jt)

Answer 6

from resting position, 15-30 degrees

Question 7

arthrokinematics of retraction (sc jt)

Answer 7

roll: posterior
slide posterior

Question 8

protraction osteokinematics (sc jt)

Answer 8

from resting position, 15-30 deg

Question 9

arthrokinematics of protraction (sc jt)

Answer 9

roll: anterior
slide: posterior

Question 10

plane and axis of retraction and protraction

Answer 10

transverse plane, y axis

Question 11

axial/transverse rotation osteokinematics (sc jt)

Answer 11

40-50 deg

Question 12

plane and axis of axial/transverse rotation

Answer 12

transverse plane, y axis

Question 13

articulating surfaces of gh joint

Answer 13

humeral head (convex) on glenoid fossa (concave)

Question 14

arthrokinematics of flexion (gh jt)

Answer 14

roll: anterior
slide: posterior

Question 15

arthrokinematics of extension (gh joint)

Answer 15

roll: posterior
slide: anterior

Question 16

arthrokinematics of abduction (gh joint)

Answer 16

roll: superior
slide: inferior

Question 17

arthrokinematics of adduction (gh joint)

Answer 17

roll: inferior
slide: superior

Question 18

arthrokinematics of ext rot (gh jt)

Answer 18

roll: posterior
slide: anterior

Question 19

arthrokinematics of int rot (gh jt)

Answer 19

roll: anterior
slide: posterior

Question 20

plane and axis of flexion-extension (gh jt)

Answer 20

sagittal plane, x axis

Question 21

plane and axis of abduction-adduction (gh jt)

Answer 21

frontal plane, z axis

Question 22

plane and axis of ext and int rotation (gh jt)

Answer 22

horizontal/transverse plane, y axis

Question 23

roll and slide does not occur on this joint bc the articulating surfaces are flat

Answer 23

acromioclavicular joint (ac joint)

Question 24

concominant/simultaneous glenohumeral and scapulothoracic joints motion during shoulder elevation/abduction

Answer 24

scapulohumeral rhythm

Question 25

60 deg of elevation is attributed to

Answer 25

scapulothoracic jt (ac+sc jt)

Question 26

120 deg of elevation is attributed to

Answer 26

glenohumeral jt

Question 27

early phase of scapulohumeral rhythm

Answer 27

scapaular/setting phase

Question 28

explain setting phase

Answer 28

0-30 deg, scapula seeks stabilization in relation to humerus, no 2:1 ratio yet

Question 29

explain late phase

Answer 29

40-180 or 70-130 deg

Question 30

late phase on sc joint

Answer 30

30 deg of elevation happens, 40 deg of posterior rotation of the clavicle; if this will not occur overall arm abduction is restricted to 110 deg

Question 31

late phase on ac joint

Answer 31

30 deg of upward rot

Question 32

late phase on scapulothoracic joint

Answer 32

60 deg of upward rot

Question 33

late phase on gh joint

Answer 33

120 deg of elevation

Question 34

what is 2:1 ratio of scapulohumeral rhythm

Answer 34

for every 2 deg of gh joint, 1 deg occurred at st joint

Question 35

two forces whose points of application occur on opposite sides of an axis and in opposite directions to produce rotation of body

Answer 35

force couple

Question 36

force couple upward rot

Answer 36

serratus anterior
upper and lower traps

Question 37

force couple downward rot

Answer 37

rhomboids
levator scapulae
pec minor

Question 38

force couple abduction

Answer 38

deltoid
rotator cuff (sits)