Axilla and Brachial Plexus

by James Pickering, PhD

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    In this lecture, we’re going to look at the axilla and the brachial plexus. So for the axilla, which is a space between the humerus and the thoracic wall, we’re going to look at its boundaries. We’ll look at the walls, we’ll look at its base, and we’ll look at the apex of the axilla. We’ll then look at the contents, the axillary artery, the axillary vein, and some axillary lymph nodes. And we’ll also pay attention to the brachial plexus which is within the axilla. We’ll then look at the brachial plexus itself. We’ll look at the various parts, its components, and we’ll look at the anatomical relations. So the axilla is a space that’s located between the humerus and the chest wall. So here we can see the humerus, and we can see in this space here between the humerus laterally and the chest wall medially, we find the axilla. It’s a pyramidal space and most of its boundaries are formed by muscles. So the axilla we'd assume this space in here. Medially, we have the chest wall and serratus anterior. And laterally, in this abducted arm, we’ll see that the lateral boundary is the intertubercular groove of the humerus. So we’re looking in this space here. And as I mentioned, it’s got a lateral, a medial, an anterior, a posterior boundary of these walls. It’s got an apex and it has a base. So a pyramidal space that is below the glenohumeral joint, between the humerus and the chest wall. It provides an important passageway for vessels and nerves to pass to and from the upper limb. Structures like the axillary artery, axillary vein, and like I mentioned the brachial plexus. The apex of the axilla is known as the cervico-axillary canal. And this is located between...

    About the Lecture

    The lecture Axilla and Brachial Plexus by James Pickering, PhD is from the course Upper Limb Anatomy. It contains the following chapters:

    • Axilla
    • Scapulohumeral muscles
    • Axillary artery
    • Brachial plexus

    Included Quiz Questions

    1. The medial wall is formed by latissimus dorsi
    2. The anterior wall is formed by pectoralis major and minor
    3. The lateral wall is formed by the humerus
    4. The posterior wall is formed by subscapluris, teres major and latissimus dorsi
    1. Subscapularis
    2. Teres minor
    3. Infraspinatus
    4. Supraspinatus
    5. Serratus anterior
    1. C5, C6, C7, C8 and T1
    2. C2, C3, C4, C5 and C6
    3. C3, C4, C5, C6 and C7
    4. C4, C5, C6, C7 and C8
    5. C6, C7, C8, T1 and T2
    1. Posterior cord
    2. Medial cord
    3. Middle trunk
    4. Lateral cord
    5. Upper trunk

    Author of lecture Axilla and Brachial Plexus

     James Pickering, PhD

    James Pickering, PhD

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