Shoulder Muscles Flashcards
Glenohumeral Ligaments (GHL)
Formed by a group of ligaments that connect the humerus to the glenoid.
These ligaments are the main source of stability for the shoulder
They are the superior middle and inferior glenohumeral ligaments.
They help hold the shoulder in place and keep it from dislocating
Coraco-acromial Ligament (CAL)
Links the coracoid to the acromion . This ligament can thicken and cause Impingement Syndrome
Coraco-clavicular Ligaments (CCL)
two ligaments (trapezoid and conoid ligaments) attach the clavicle coracoid process of the scapula.
keeping the scapula attached to the clavicle and thus keeping your shoulder ‘square’.
Transverse Humeral Ligament (THL)
Holds the tendon of the long head of biceps brachii muscle in the groove between the greater and lesser tubercle on the humerus (intertubercular sulcus).
Ligaments of the shoulder (glenoid humeral joint)
Coracoclavicular ligament
- Conoid ligament
- Trapezoid ligament
Acrmioclavicular Ligament
Coraco - acromial Ligament
Coraco - humeral Ligament
Transverse humeral Ligament
Superior GHL
Middle GHL
Inferior GHL
Bursa in the shoulder
Subacromial bursa
Subscapularis O & I
O - subscapular fossa
I - lesser tubercle of the humerus
Infraspinatus O & I
O - Infraspinous fossa of scapula
I - Greater tubercle of humerus
A - External rotation
Teres Minor O & I
O - lateral border and adjacent posterior surface of the scapula
I - greater tubercle of the humerus
Supraspinatus O & I
O - supraspinous fossa
I - Greater tubercle of humerus
Flexion of GH joint
Deltiod Anterior Fibres
Pectoralis Major (upper fibres)
Biceps Brachii
Coracobrachialis
Extension of GH joint
Deltiod (Posterior fibres)
Latissimus Dorsi
Teres Major
Infraspinatus
Teres Minor
Pectoralis Major (Lower fibres)
Triceps Brachii (Long Head)
Abduction of GH joint
Deltiod (all Fibres)
Supraspinatus
Adduction of GH joint
pectoralis major
latissimus dorsi
teres major
triceps brachii
coracobrachialis.
External rotation of GH joint
Infraspinatus
Teres Minor
Posterior deltoid
Internal rotation of GH joint
subscapularis
pectoralis major
latissimus dorsi
anterior deltoid
Pectoralis Major O & I
O - Clavicular part: anterior surface of medial half of clavicle
Sternocostal part: anterior surface of sternum
Costal cartilages of ribs 1-6
Abdominal part: Anterior layer of rectus sheath
I - Crest of greater tubercle of humerus
Teres Major O & I
O - Inferior angle and lower part of the lateral border of the scapula
I - Intertubercular sulcus (medial lip) of the humerus
Deltoid Anterior O & I
O - anterior border and upper surface of the lateral third of the clavicle
acromion
spine of the scapula]
I - deltoid tuberosity of humerus
Middle Deltoid O & I / A
O - acromion process
spine of the scapula.
I - Deltoid tuberosity of the humerus.
A - Arm Abduction
Posterior deltoid O & I
O - lateral third of the spine of the scapula
I - Deltoid tuberosity of the humerus.
Pectoralis Minor O & I
O - Costal cartilages of ribs 3-5
I - Medial border
coracoid process of scapula
Levator Scapulae O & I
O -Transverse processes of vertebrae C1-C4
I - Medial border of scapula
Triceps O & I / A
O - Long head - infraglenoid tubercle of the scapula
- Medial head - proximal 1/2 posterior surface of the humerus
- Lateral head - Distal 1/2 posterior surface of the humerus
I - Olecranon of ulna
A - Elbow extension
Bicep Brachii O & I / A
O - Short head - Apex of the Coracoid process of the scapula
- Long head - Supraglenoid tubercle of the scapula
I - Radial tuberosity
Aponeurosis
A Elbow Flexion
Supination of forearm
Trapezius Superior fibres O & I / A
O - medial third of the superior nuchal line,
- External occipital protuberance
I - lateral third of clavicle
A - Extension of head and neck
Trapezius Middle Fibres O & I
O - Spinous processes
- Supraspinous ligaments of vertebrae T1-T4 (or C7-T3)
I - medial acromial margin
superior crest of spine of scapula
Trapezius Inferior Fibres O & I
O - Spinous processes and
Supraspinous ligaments of vertebrae T4-T12
I - Lateral apex of the medial end of scapular spine
