Lecture Exam 2 - Shoulder

Clavicle

Acromion of Scapula

Coracoid Process of the Scapula

Manubrium

Body of Sternum

Xiphoid Process

Acromioclavicular Joint

Glenohumeral Joint

Sternoclavicular Joint

Articular Disc and Cavities

Synovial joint with 2 joint cavities separated by an disc

Costoclavicular Ligament

Subclavius Muscle

Clavicle Fracture

Transmits all force from upper limb to the axial skeleton

60 degrees

How much can the Sternoclavicular Joint be raised?

30 degrees anteriorly or posteriorly.

What is the degree of movement of the Sternoclavicular Joint during protraction and retraction of the scapula?

grade I or II

Only joint capsle of Acromioclavicular Joint dislocated

grade III

Joint capsule and Coracoclavicular ligament torn

Acromioclavicular Joint Dislocation (shoulder seperation)

Torn Coracoclavicular Ligament

Shoulder falls away from the clavicle

Glenoid fossa

Head of Humerus

Anatomical Neck of Humerus

Surgical Neck of Humerus

Surgical Neck

Common Fracture site of Humerus

Coracoacromial ligament

Glenohumeral Joint

Shoulder Abduction

Shoulder Adduction

Shoulder Flexion

Shoulder Extension

Subscapularis

Subscapular Fossa of Scapula

Origin of Subscapularis

Lesser Tubercle of Humerus

Insertion of Subscapularis

Medially rotates and adducts the Humerus

Action of Subscapularis

Infraspinatus

Infraspinous Fossa of the Scapula

Origin of Infraspinatus

Greater Tubercle of Humerus

Insertion of Infraspinatus

Laterally rotates the Humerus

Action of Infraspinatus

Teres Minor

Lateral border of the Scapula

Origin of Teres Minor

Greater Tubercle of Humerus

Insertion of Teres Minor

Laterally rotates the Humerus

Action of Teres Minor

Supraspinatus

Supraspinous Fossa of the Scapula

Origin of Supraspinatus

Greater Tubercle of Humerus

Insertion of Supraspinatus

Initiates abduction of humerus; stabilizes abducted arm

Actions of Supraspinatus

Glenoid Labrum

Glenohumeral (Shoulder) Dislocation

Caused by excessive abduction, extension and lateral rotation of the humerus

Suprascapular Nerve

Nerve of Supraspinatus

Suprascapular Artery

Blood Supply of Supraspinatus

Suprascapular Nerve

Nerve of Infraspinatus

Suprascapular Artery

Blood Supply of Infraspinatus

Deltoid

Lateral Spine of Scapula, Acromion, lateral Clavicle

Origin of Deltoid

Deltoid Tuberosity of the Humerus

Insertion of Deltoid

Flexes, medially rotates humerus

Action of Deltoid (Anterior)

Abduction to shoulder height

Action of Deltoid (Middle)

Extends, laterally rotates humerus

Action of Deltoid (Posterior)

Deltopectoral Groove

Bursae

Thin, closed sac of serous membrane that secretes a fluid lubricant to reduce friction between adjacent mobile structures

Shoulder Bursae

Rotate scapula to abduct the upper limb above the shoulder

Action of Trapezius

Serratus Anterior

Medial border of the scapula

Insertion of Serratus Anterior

Rotate Scapula to abduct arm to above shoulder height

Action of Serratus Anterior

Lateral Thoracic Artery

Blood Supply of Serratus Anterior

Long Thoracic Nerve

Nerve of Serratus Anterior

Teres Major

Inferior angle of the Scapula

Origin of Teres Major

anterior side of Humerus

Insertion of Teres Major

adducts and medially rotates Arm

Action of Teres Major

Lower Subscapular Nerve

Nerve of Teres Major

Triangular Space

Quadrangular Space

Deltoid Myotome

C5

Coracoclavicular Ligament

50 degrees

Range of motion at Acromioclavicular Joint