UNIT 2 - chapter 10

Question 1

Muscles can only ___

Answer 1

pull, not push

Question 2

The shoulder joint

Answer 2

Ball and socket, triaxial

Question 3

Joint motions of the shoulder joint

Answer 3

4 groups of motions
Flexion/ extension/ hyper extension
Adduction/ abduction
Internal/ external rotation
Horizontal adduction/ abduction

Question 4

Flexion/ extension/ hyperextension

Answer 4

Plane- sagittal
Axis- frontal

ROM
Flexion: 0-180
Extension: return to normal
Hyperextension: 0-45 (anatomical position)

Question 5

Adduction/ abduction

Answer 5

Plane- frontal
Axis- sagittal

ROM
0-180

Question 6

Internal/ external rotation

Answer 6

Plane- transverse
Axis- vertical

ROM
0-90 in each direction

Question 7

Horizontal adduction and abduction

Answer 7

Plane- transverse
Axis- vertical

ROM
Starting position: 90 degress of should abduction

Horizontal adduction: 0-120
Horizontal abduction: 0-30

Question 8

Scaption

Answer 8

Plane- scapular, 30 degrees in front of the frontal place, midway between flexion and abduction

functional plane, most functional activities occur here

ROM
0-180

Question 9

Arthrokinematic motion

Answer 9

Convex-concave rule
flextion/ abduction: opposite direction
extension/ adduction: reverses

Question 10

Joint capsule

Answer 10

Spacious, outer fibrous, inner synovial

Partial vacuum to help hold humeral head to glenoid fossa

Question 11

Glenohumeral ligaments

Answer 11

3 ligaments, superior, middle, and inferior
part of joint capsule

function: to reinforce anterior portion

Question 12

Coracohumeral ligament

Answer 12

function: strengthens the upper part of joint capsule

Question 13

Glenoid labrum

Answer 13

Fibrous ring on the rim of the glenoid fossa

Deepens the articular surface

Question 14

Bursae

Answer 14

Subdeltoid: large, located between the deltoid muscle and the joint capsule, protects deltoid from being rubbed by bony

Subacromial: below acromion process, coracoacromial ligament, protect

Question 15

Rotator cuff

Answer 15

Rotate humerus head, tendinous band formed when all the tendons inserting from the muscle blend together

Keeps the head of the humerus in glenoid fossa, and funtions to keep the joint together during movement and aids in rotation

Question 16

SITS mm

Answer 16

Subscapularis
Infraspinatus
Teres minor
Supraspinatus

Question 17

Thoracolumbar fascia

Answer 17

Attachment for the latissimus dorsi

Question 18

Subscapularis

Answer 18

Internal rotation, line of pull horizontal

Question 19

Coracobrachialis

Answer 19

Action: stabilization of the humeral head in the glenoid fossa
line of pull vertical

Question 20

Deltoid

Answer 20

anterior, middle, posterior

Question 21

Anterior deltoid

Answer 21

Action: abduction, internal rotation, horizontal adduction

Line of pull: oblique when at side, horizontal at shoulder level

Question 22

Middle deltoid

Answer 22

Action: abduction

inchworm effect

Question 23

Posterior deltoid

Answer 23

Action: abduction, extension/ hyperextension, external rotation, horizontal abduction

Line of pull: oblique, horizontal when at shoulder level

Question 24

Pectoralis major

Answer 24

Clavicular and sternal portions

Question 25

Clavicular portion of pectoralis major

Answer 25

Action: sagittal plane, shoulder flexion from 0-60, Line of pull: when shoulder is in neutral, vertical

Question 26

Sternal portion of the pectoralis major

Answer 26

Action: shoulder extension, 180-120 in sagittal plane Line of pull: vertical, best when fully flexed

Question 27

Combined clavicular and sternal

Answer 27

Action together: adduction, internal rotation, and horizontal adduction

Question 28

Latissiumus dorsi

Answer 28

Action: extension/ hyperextension, adduction, internal rotation Line of pull: vertical reversal of muscle action: crutch walking example

Question 29

Teres major

Answer 29

Action: extension, adduction, internal rotation

Question 30

Supraspinatus

Answer 30

Action: abduction, humeral head stabilization

Question 31

Infraspinatus

Answer 31

Action: external rotation, horizontal abduction

Question 32

Teres minor

Answer 32

Action: external rotation, horizontal abduction

Question 33

Glenohumeral movement

Answer 33

Abduction: force couple, arthrokinematic movement, as arm abducts the humeral head rolls and glides in the glenoid fossa due to movement of the rotator cuff muscles Supraspinatus- pulls humeral head in others- pull in and down Rotation: have to laterally rotate your arm to get full AROM, reposition for the acromion

Question 34

Acromioclavicular seperation

Answer 34

Ligament injury, 1 degree: a-c ligament is stretched 2 degree: a-c is ruptered and the coracoclavicular is stretched 3 degree: both are ruptered

Question 35

Fractures

Answer 35

Clavicular: kids, falls Humeral neck: elderly, falls Pathologic: caused by tumors, cancer

Question 36

Dislocations

Answer 36

Anterior shoulder dislocation: most common, forced shoulder abduction with lateral rotation causes humeral head to dislocated anteriorly G-H subluxation: common after CVA, paralysis and gravity results in loss of humeral head position