Upper Extremity Flashcards
Posterior boundary of the axilla?
Subscapular
Latissimus dorsi
Teres major
Also called the Scapular Boundary
Anterior boundary of the axilla?
Pectoralis major
Pectoralis minor
Subclavius
Also called Pectoral boundary
Medial boundary of the axilla?
2nd to 6th rib and intercostal muscles
Serratus anterior muscle
Also called the Costal Boundary
Lateral boundary of the axilla?
Humerus
Short and Long head of the biceps brachii
Coracobrachialis
Apex boundary of the axilla?
Bounded by 3 bones:
Clavicle (anterior)
Scapula (posterior)
1st rib (medial)
Base boundary of the axilla?
Skin
Subcutaneous fascia
Axillary fascia
What structures are covered by the axillary fascia?
Axillary vein
Axillary artery
Brachial plexus
True or False:
The axillary fascia is the lateral prolongation of the vertebral fascia and extends up to the elbow?
False
Prevertebral fascia NOT vertebral fascia
What are the rotator cuff muscles?
Remember SITS Supraspinatus Infraspinatus Teres Minor Subscapularis
What are the intrinsic muscles of the shoulder?
Supraspinatus Infraspinatus Teres Minor Subscapularis Deltoid Teres Major
Nerve supply and action of Supraspinatus?
Suprascapular
Abductor (initiates abduction)
Nerve supply and action of Infraspinatus?
Suprascapular
Lateral rotator
If the axillary nerve is compromised what shoulder action/s will be lost?
Abduction and Lateral Rotation
(Pero iniisip ko na ang mawawala ay yung full abduction kasi yung Supraspinatus kaya niya up to certain point kasi siya yung Initiator of Abduction at yung Lateral Rotation baka weakened lang kasi kaya rin yun ng Infraspinatus)
Nerve supply and action of Teres Minor?
Axillary
Lateral Rotator
Nerve supply and action of Subscapularis?
Upper subscapular
Medial rotator