Anatomical Landmarks
SC and AC Joint
Scapulothoracic Joint
Musculature
Force Couples
100

Where the vertebral and axillary border of the scapula meet 

Inferior angle 

100

Degrees of freedom in the SC joint 

3

100
Movement is a direct result of motion at the ______ and the ______ joints 

SC and AC

100

Boxer's muscle 

Serratus anterior 

100

What is 

When two muscles generate force in different directions on opposite sides of a joint's axis, produces rotary movement 

200
Hook-shaped projection on anterior/superior surface of the scapula 

Coracoid process

200

Only direct attachment of the upper extremity to the axial skeleton 

SC joint 

200

Scapula is moving in an inferior direction 

Depression 


200

Elevator of the scapula 

Levator scapula 


200

Scapulohumeral rhythym: how much abduction occurs only at the GH joint?  

30 degrees 

300

Lateral broad, flat end of the spine of the scapula 

Acromion process 


300
Motions of the AC joint are described as ______ movements 

Scapular 

300

Also known as scapular abduction 

Protraction

300

Dysfunction of the trapezius may result in impairment of what scapular movement? 

Scapular upward rotation 
300

After initial abduction, _____ degrees of abduction must be accompanied by ____ degrees of scapula movement 

2:1 

400

Of the clavicle, this end articulates with the sternum

Sternal end 

400
With scapular protraction, the concave on convex rule tells us the SC joint moves how? 

Roll and slide in the SAME direction (anteriorly) 

400
Rotation of the inferior angle laterally and superiorly 

Upward rotation 

400

Originates: occipital bone, ligamentum nuchae, and spinous processes from C7-T12

Inserts: acromial end of the clavicle, acromion, and spine of the scapula 

Trapezius 


400
Upward rotation muscles 

Upper trapezius, serratus anterior, lower trapezius

500

Plane of the scapula 

30 degrees forward of the frontal plane (not quite midway between flexion/abduction) 

500
The clavicle portion of the joint is generally _______ vertically, and ______ anterior/posterior. 

Convex/concave 

500
Name all movements of the scapula 

Elevation/depression 

Protraction/retraction 

Upward/downward rotation 


500

Originates: anterior surface of the 3rd-4th ribs 

Inserts: coracoid process of the scapula 

Pec minor 

500

Downward rotation muscles 

Levator scapula, pectoralis minor, rhomboids