The Shoulder Joint Flashcards
Which muscle forms the lateral contour of the shoulder?
Deltoid
Which nerves supplies the deltoid?
Axillary nerve
Which nerves supply the pectoralis major muscle?
Medial and lateral pectoral nerves
What muscles form the posterior fold of the axilla?
Latissimus dorsi
Subscapurlaris
Teres major
What muscles form the anterior fold of the axilla?
Pectoralis major and minor
Which muscles attach to the coracoid process?
Pectoralis minor
Coracobrachialis
Short head of biceps
In what way is the coracoid process an important landmark in surgery?
Keeping strictly lateral from the process ensures avoidance of the brachial plexus and axillary artery
What structure can be felt in the axilla when the arm is fully abducted?
Humeral head
The regimental badge patch is an area for sensory testing of which nerve?
Axillary nerve
What is the purpose of the glenoid labrum?
It extends the surface of the glenoid cavity to improve the stability of the joint
The tendon of which muscle runs along the intertubercular sulcus of the humerus and attaches to the top of the glenoid cavity?
Long head of biceps
Which muscle binds the wall of the axilla medially?
Serratus anterior
What are the three points of origin of the pectoralis major?
Clavicular point from the sternal half of the clavicle
The sterno-costal point from the sternum and costal cartilages 1-7
Abdominal point from the rectus sheath
Where is the insertion of pectoralis major?
Crista tuberculi of the humerus
What is the action of pectoralis major?
Adduct and medially rotate the arm
depress the shoulder girdle
Antevert the scapula
Elevate the ribcage for inspiration
