Anatomy of the Axilla

Which anatomical term refers to the armpit?

What shape best describes the axilla?

Which of the following structures is NOT located within the axilla?

Which of the following bones contributes to the apex of the axilla?

The base of the axilla is primarily formed by what?

Which muscle primarily forms the anterior axillary fold that bounds the axilla?

Which muscles form the posterior axillary fold?

Which of the following structures is NOT considered part of the anterior wall of the axilla?

What muscle primarily forms the medial wall of the axilla?

Which muscle primarily contributes to the formation of the lateral wall of the axilla?

Which muscles are responsible for forming the posterior wall of the axilla?

Which of the following is NOT a primary content of the axilla?

What type of tissue is most abundant within the axilla, surrounding the neurovascular structures?

Which structure encloses the neurovascular bundle within the axilla?

The brachial plexus originates from which spinal nerve roots?

The brachial plexus is located in which triangle?

What is the correct order of organization of the brachial plexus, from proximal to distal?

Which vein does the basilic vein become after crossing the lower border of teres major?

Which vein joins the axillary vein?

Which of the following is the correct order of lymph node drainage in the axilla?

From which artery does the axillary artery directly originate?

Where does the axillary artery transition into the brachial artery?

The axillary artery is divided into three parts based on its relation to which muscle?

How many branches arise from the first part of the axillary artery?

What is the name of the branch that comes off the first part of the axillary artery?

How many branches arise from the second part of the axillary artery?

Which of the following arteries does NOT arise from the second part of the axillary artery?

How many branches of the axillary artery come from the third part?

Which artery is typically the thickest branch of the axillary artery?

Which of the following arteries supplies the head of the humerus and the shoulder joint?

The cords of the brachial plexus are named in relation to which structure?

A surgeon is performing a procedure in the axilla and needs to ligate a vessel to control bleeding. If they ligate the axillary artery proximal to the origin of the thoracoacromial artery, what other artery would be MOST crucial in providing collateral circulation to the upper limb?

While dissecting a cadaver, a medical student notices a significant variation in the axilla. The lateral thoracic artery arises directly from the third part of the axillary artery instead of its usual origin from the second part. Which of the following structures would MOST likely be at increased risk of iatrogenic injury during a surgical procedure in this variant axilla?

A patient presents with lymphedema 6 months following axillary lymph node dissection. Which lymphatic group is MOST likely responsible for the condition?

A surgeon is planning to perform an axillary lymph node dissection for staging breast cancer. To minimize risk of injury to the thoracodorsal nerve, which muscle should the surgeon carefully retract rather than transect?

A 60-year-old male presents with compression of the brachial plexus within the axilla due to an expanding hematoma. Which anatomical structure, upon compression, would FIRST cause ischemia of the structures of the arm.

During a surgical procedure, the axillary sheath is damaged. Which best describes the MOST immediate consequence of this damage?

A patient reports numbness in their lateral arm and difficulty abducting their arm past 15 degrees after a bike accident. Imaging reveals compression of a nerve in the axilla. Which specific nerve is MOST likely compressed, considering the patient's symptoms?

What combination of anatomical structures create the cervicoaxillary canal, that connects the neck with the axilla?