Shared Flashcard Set

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1 Axilla, Brachial Plexus and the Arm
For TEST 1
19
Anatomy
Graduate
09/24/2011

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Cards

Term
What forms the medial wall of the axilla?
Definition
Thoracic wall and overlying serratus anterior
Term
What forms the anterior wall?
Definition
Pectoralis major and minor
Term
At what anatomic landmark does the subclavian artery become the axillary artery?
Definition
As it crosses the 1st rib
Term
What is the largest branch of the axillary artery?
Definition
Subscapular
Term
What are its two major branches?
Definition
Scapular circumflex & thorocodorsal
Term
To insure survival of the upper limb (esp. the hand) where can the axillary artery be ligated during an emergency procedure following a traumatic bullet-induced tear in the axillary artery just below the clavicle?
Definition
Any where proximal to the subscapular artery
Term
What cord of the brachial plexus lies deep to the axillary artery?
Definition
Posterior
Term
Name five nerves derived from the posterior cord:
Definition
upper & lower subscapular, thorocodorsal, radial, axillary
Term
What is the "M" of brachial plexus?
Definition
lateral cord, musculocutaneous, median, medial cord, ulnar nerves
Term
What component of the brachial plexus supplies the flexor region of the arm?
Definition
Upper roots to make up the musculocutaneous nerve
Term
What muscle group in the arm is innervated by the median nerve?
Definition
None
Term
What muscle group in the arm is innervated by the radial nerve?
Definition
Triceps brachii
Term
Where is the radial nerve in the arm most susceptible to trauma?
Definition
Radial (spiral) groove on humerus
Term
What three muscles attach to the corocoid process of the scapula?
Definition
Pectoralis minor, corocobrachialis, short head of biceps brachii
Term
What is the name for the most common upper brachial plexus injury?
Definition
Erbs Palsy
Term
What motions are lost that cause the final positioning of the upper limb in Erbs Palsy?
Definition
Flexion of elbow, lateral rotation of shoulder, some supination
Term
What are the likely circumstances which cause upper brachial plexus injuries?
Definition
Falls that increase the angle between neck and shoulder, or difficult baby deliveries where this space is stretched (the baby)
Term
what is the name of the highest axillary lymph nodes within the axilla?
Definition
apical
Term
How does lymph from the axilla enter circulation?
Definition
The large veins in the root of the neck - near junction of internal jugular and subclavian veins
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