The Shoulder Flashcards
Of what does the Shoulder Girdle consist?
The Clavicle and Scapula
What is the purpose of the Shoulder Girdle?
Connects the Arm to the Axial Skeleton
Name 4 joints of the Shoulder Girdle
Sternoclavicular Joint (SCJ) Acromioclavicular Joint (ACJ) Scapulothoracic Joint Glenohumeral Joint (Shoulder Joint)
What type of Joint is the Glenohumeral?
Ball and Socket (synovial)
Name 4 Extracapsular Ligaments of the shoulder
Coracoclavicular
Coracoacromial
Coracohumeral
Glenohumeral
Name the Rotator Cuff Muscles
Supraspinatus (Suprascapular N.)
Infraspinatus (Suprascapular N.)
Teres Minor (Axillary N.)
Subscapularis (Upper and Lower Subscapular N.)
Outline the roles of the Rotator Cuff Muscles
Important stabilisers of the Shoulder Joint
Supraspinatus initiates abduction of Shoulder
Infraspinatus and Teres Minor externally rotate Shoulder
Subscapularis internally rotates the Shoulder
What lies within the Subacromial Space? (Between acromian and humeral head)
Subacromial Bursa
Rotator Cuff Tendons
Capsule
Long Head of Biceps
The first 90 degrees of abduction of Shoulder are facilitated by which muscles?
Supraspinatus (0-15 degrees)
Deltoid (15-90 degrees)
Which Joint is involved in the first 90 degrees of Shoulder abduction?
Glenohumeral Joint
Shoulder abduction past 90 degrees is facilitated by which muscles?
Upper Trapezius and Serratus Anterior
Which Joint is involved in Shoulder abduction past 90 degrees?
Scapulo-thoracic Joint
Which Muscles are responsible for Adduction of Shoulder?
Pectoralis Major (Pectoral Ns.) Latissimus Dorsi (Thoracodorsal N.) Teres Major (Thoracodorsal N.)
Which Muscles are responsible for Flexion of the Shoulder?
Anterior Fibres Deltoid (Axillary N.)
Pectoralis Major (Pectoral Ns.)
Coracobrachialis (Musculocutaneous N.)
Biceps Brachii (Musculocutaneous N.)
Which Muscles are responsible for Extension of the Shoulder?
Posterior Fibres Deltoid (Axillary N.) Latissimus Dorsi (Thoracodorsal N.) Teres Major (Thoracodorsal N.)
Which Muscles are responsible for Internal Rotation of the Shoulder?
Subscapularis (Upper and Lower Subscapular Ns.) Teres Major (Thoracodorsal N.) Pectoralis Major (Pectoral Ns.) Latissimus Dorsi (Thoracodorsal N.)
Which Muscles are responsible for External Rotation of the Shoulder?
Infraspinatus (Suprascapular N.) Teres Minor (Thoracodorsal N.)
Which Arteries are most at risk in Shoulder dislocation?
Anterior and Posterior Circumflex Humeral
What are the 2 types of Glenohumeral stabiliser?
Static, and Dynamic
Name the Static Glenohumeral Stabilisers/Factors
Articular Congruency Glenoid Labrum Capsule GH Ligaments Extra-capsular Ligaments Negative Intra-articular Pressure
Name the Dynamic Glenohumeral Stabilisers/Factors
Rotator Cuff Muscles
Biceps Brachii
Muscles Crossing the Shoulder
