Where does the brachial artery begin?

The brachial artery begins at the lower border of the teres major muscle. This anatomical landmark is significant because the brachial artery is a continuation of the axillary artery once it passes the teres major. This transition indicates that the artery is moving from the axilla, where it is referred to as the axillary artery, into the arm.

In terms of clinical significance, understanding the location of the brachial artery is essential for procedures such as taking blood pressure or accessing the artery for various medical interventions. The artery runs along the medial side of the arm and is easily accessible for palpation and procedural access in this location.

The other suggestions do not correspond to the anatomical starting point of the brachial artery. The cubital fossa marks a different vascular relationship as it is a depression in the elbow where other arteries and veins are situated, not the origin of the brachial artery. The upper border of the clavicle does not relate to the brachial artery as it is higher in the body, dealing primarily with vascular structures in the thoracic outlet. Lastly, the midpoint of the humerus, while related to the course of the brachial artery as it travels down the arm, does not indicate