Joint Characteristics
Capsular pattern of the Glenohumeral joint
The four rotator cuff muscles
Supraspinatus, infraspinatus, Teres minor, subscapularis
Prime mover(s) of GH flexion
Pec major (clavicular head) and deltoid (clavicular and anterior acromial parts)
The biceps brachii is innervated by what nerve?
Musculocutaneous (C5-6)
Normal shoulder extension ROM
0-60*
What type of joint is the GH joint?
Ball and socket synovial joint
The two bursa to the GH joint
Subacromial and subscapular
Prime mover(s) of GH abduction
Deltoid
What is the innervation to the triceps muscle?
Radial nerve (C7-8)
What is the painful arc?
GH painful arc: 45-120*
acromioclavicular painful arc: 170-180*
Degree of freedom in the GH joint
3
What GH Ligament supports the humeral head above 90* abduction and limits inferior translation?
Inferior glenohumeral ligament
Shoulder complex is composed of what two joints
Scapulothoracic and glenohumeral joints
What is the innervation of the deltoid muscle?
Axillary nerve (C5-6)
Goniometric landmarks for measuring GH abduction ROM
stationary arm: parallel to midline of sternum
moving arm: medial midline of humerus
Scapulothoracic joint extends from what Spinous processes?
T2-T7/9
Origin and insertion of the biceps brachii? (Both the long head and short head)
Long head: supraglenoid tubercle of scapula
short head: coracoid process
insertion: radial tuberosity
Prime mover of GH lateral rotation
Infraspinatus
What spinal nerves are involved in the brachial plexus?
C5, C6, C7, C8, T1
Paralysis of what muscles is characterized by scapular winging
Serratus anterior
What type of joint is the AC joint?
Plane synovial
Origin and insertion of the Teres major?
O: dorsal surface of inferior angle of scapula
I: medial lip of intertubercular groove of humerus
abduction in the plane of the scapula is referred to as
following the 5 spinal nerves of the brachial plexus, what is the next division?
3 trunks (superior, middle, inferior)
Ratio of GH motion to scapulothoracic motion during arm elevation
2:1