Week 10 (shoulder) terms KINES 127

Bones in the pectoral girdle

Sternum, clavicle, scapula, humerus

Parts of the sternum

manubrium (superior), body (middle), xiphoid process (inferior)

What and where does the clavicle articulate with

the manubrium of the sternum (sternal end) and the acromion (acromial end)

acromion

bony progection from the scapula

scapula

shoulder blade

clavicle

collar bone

Bones of the acromioclavicular joint

acromion and clavicle

ligaments of the acromioclavicular (AC) joint

Acromioclavicular, Coracoclavicular, Coracoacromial

Movement of acromioclavicular (AC) joint 

gliding (plane synovial)

Sternoclavicular (SC) joint bones

sternum and clavicle

Movement of sternoclavicular (SC) joint

Protraction/Retraction

Elevation/Depression

Posterior Rotation

What bones does the scapula connect

clavicle to humerus

Movement of the glenohumeral (shoulder) joint

Flexion/Extension

Abduction/Adduction

Medial/Lateral Rotation

Circumduction

What type of joint is the glenohumeral (shoulder) Joint

ball and socket

Purpose of Glenoid labrum

deepens and widens socket for head of humerus

Front muscles that move the arm

Pectoralis major, Deltoid, Coracobrachialis, Biceps brachii

Back muscles that move the arm

Latissimus dorsi, Teres major, Triceps brachii

Rotator cuff muscles

Infraspinatus, Teres Minor, Subscapularis, Supraspinatus, Teres Minor

Impingement

Painful inflammation of the rotator cuff in the subacromial space

Cause of impingement

chronic overuse (repetitive overhead motions)

Multidirectional Instability

Imbalance between shoulder mobility and stability, shoulder subluxs or dislocates frequently

Cause of multidirectional instability

genetics or sports and activity

Bones involved with the dislocation of shoulder

humerus and glenoid cavity of the scapula

labrum tear

Injury to the glenoid labrum (where ball of the joint rests)

Rotator cuff injury

injury to the tendons on the rotator cuff (shoulder blade muscles)

Clavicle fracture

collar bone fracture

What is the most common fracture of childhood?

clavicle fractures

AC joint sprain

injury to the ligaments of Acromioclavicular joint

Bump or piano key deformity

able to press down on bone an it pops back up because of sprained ligament

SC joint sprain

injury to the ligaments of Sternoclavicular joint

When is a SC joint sprain life threatening?

posterior dislocations can push on the airway

Brachial Plexus Injury MOI

traction or compression of the Brachial Plexus (area from neck to shoulder)

brachial plexus

complex network of nerves that transmits signals from the spinal cord to the shoulder, arm, and hand