Shoulder (functional exam 2)

Rotary motions of ST joint

Upward/downward rotation

Anterior/posterior tip

Internal/external rotation

Protraction/retraction

ST joint is a combination of which two joints

SC and AC joints

ST joint translatory motions

Elevation/depression

Abduction/adduction (used interchangeably with protraction/retraction)

Flexion ST joint movements

Adduction ST joint movements

Downward rotation

Depression

Adduction SC, AC, GH joint movements

SC: depression

AC : downward rotation

GH: adduction

Internal rotation ST joint movements

Arm at side: protraction

Arm at 90 degrees: anterior tip

Internal rotation SC, AC, GH joint movements

SC: protraction

AC: anterior tip

GH: internal rotation

External rotation ST joint movements

Arm at side: retraction

Arm at 90 degrees: posterior tip

External rotation SC, AC, GH joint movements

SC: retraction

AC: posterior tip

GH: external rotation

Horizontal abduction ST joint movement

Retraction

Horizontal abduction SC, AC, GH joint movements

SC: retraction

AC: adduction/external rotation ST joint

GH: horizontal abduction

Horizontal adduction ST joint movement

Protraction

Horizontal adduction SC, AC, GH joint movements

SC: protraction

AC: abduction/internal rotation

GH: horizontal adduction

Flexion prime movers of GH

Anterior deltoid

Coracobrachialis

Biceps

Flexion dynamic stabilizers of GH

SITS

Flexion scapula movers

Serratus anterior

Upper and lower trap

Middle trap (ER scapula and offsets protraction of serratus)

Extension prime movers of GH

Posterior deltoid

Lats

Teres major

Extension dynamic stabilizers of GH

SITS

Extension scapula movers

Rhomboids

Levator scap

Pec minor

Abduction prime movers of GH

Supraspinatus

Middle deltoid

Anterior and posterior delt (to cancel flexion and extension)

Abduction dynamic stabilizers of GH

ITS

Abduction scapula movers

Serratus anterior

Upper and lower traps

Middle traps (ER to offset protraction of serratus)

Adduction prime movers of GH

Lats

Teres major

Adduction dynamic stabilizers of GH

SITS

Adduction scapula movers

Rhomboids

Levator scap

Pec minor

Internal rotation prime movers of GH

Subscapularis

Lats

Pec major

Teres major

Internal rotation dynamic stabilizers of GH

SIT

Internal rotation scapula movers

Rhomboids to stabilize the scapula

External rotation prime movers of GH

Infraspinatus

Teres minor

External rotation dynamic stabilizers of GH

Subscapularis

Supraspinatus

External rotation scapula movers

Serratus to stabilize the scapula

Horizontal abduction prime movers of GH

Posterior deltoid

Infraspinatus

Teres minor

Horizontal abduction dynamic stabilizers of GH

Supraspinatus

Subscapularis

Horizontal abduction scapula movers

Rhomboids

Middle traps

Horizontal adduction prime movers of GH

Anterior deltoid

Pec major

Subscapularis

Horizontal adduction dynamic stabilizers of GH

SIT

Horizontal adduction scapula movers

Serratus anterior

Pec minor

Elevation GH movements

Upward rotation

External rotation

Posterior tip

Supraspinatus better in early or late rotation/ABD

Early (large rotation component)

Upper traps best MA for upward rotation early or late in ROM

Early

Lower traps best MA for upward rotation early or late in ROM

Late

Middle traps large or small MA for upward rot

If Serratus anterior performs UR, ER, and posterior tip at the AC joint, what else needs to be active to create protraction

Pec minor

Middle traps need help from which muscle to contract

Rhomboids

Deltoid better in early or late rotation/ABD

Late (smaller rotation component)

What needs to be active at the scapula for the

external rotators to produce ER at the humerus

Infraspinatus and teres minor

What needs to be active at the scapula for the deltoids

to produce elevation of the GH joint

UR of scapula from Serratus and traps

What needs to be active at the scapula for teres major

to extend the GH joint

Need a downward rotator of scapula (rhomboids)

In order for Infraspinatus and teres minor to ER GH joint, and not IR, we need which muscles

Serratus or middle traps

GH joint: convex or concave

Convex humerus on concave glenoid fossa

What kind of joint is SC joint + DOF

Saddle

3: clavicle elevation/depression (shrug), SC protraction/retraction (hug), spin

Movements at SC joint

Elevation/depression

Protraction/retraction

Posterior rotation

What kind of joint is AC + DOF

Planar

3 (UR/DR, IR/ER, A/P tip)

What kind of joint is GH + DOF

Ball and socket

3

Movements at GH joint

Flexion/extension

Abduction/adduction

Internal/external rotation

GH arthrokinematics: Flexion

Posterior spin

GH arthrokinematics: Extension

Anterior spin

GH arthrokinematics: Internal rotation

Anterior roll, posterior glide

GH arthrokinematics: External rotation

Posterior roll, anterior glide

GH arthrokinematics: Abduction

Superior roll, inferior glide

GH arthrokinematics: Adduction

Inferior roll, superior glide