Week 1 - Brachial Plexus, Axilla and Pectoral Region Flashcards
What forms the posterior border of the axilla?
Subscapularis, teres major and latissimus doors
What forms the anterior border of the axilla?
Pectoralis major, minor and subclavius
What forms the medial border of the axilla?
Serratus anterior and the thoracic wall, including the costal muscles
What forms the lateral border of the axilla?
The intertubercular groove of the humerus
Name the contents of the axilla.
- Axillary artery
- Axillary vein
- Brachial plexus
- Tendons of biceps brachii and coracobrachialis
- Axillary lymph nodes
State the origins of the 2 heads of pectoralis major.
Sternocostal head: sternum and ribs
Clavicular head: clavicle
State the attachment of pectoralis major.
Intertubercular groove of the humerus
State the innervation for pectoralis major.
Medial and lateral pectoral nerves
State the origin of pectoralis minor.
Ribs 3-5
State the attachment of pectoralis minor.
Coracoid process of the scapula
State the innervation for pectoralis minor.
Medial pectoral nerve
State the attachment of serratus anterior.
Medial border of the scapula
State the origin of serratus anterior.
Ribs 2-8
State the movements that serratus anterior is responsible for.
- Rotation of scapula
2. Holds the scapula against the rib cage
Which nerve is at risk of damage during axillary node clearance?
Long thoracic nerve
