Anatomy of the Arm

by James Pickering, PhD

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    In this lecture we are going to look at the arm. So we are going to start off by looking at the arm in cross section and returning to the brachial fascia we spoke about. We will also look at how it forms the intermuscular septae. We will then look at the anterior compartment, the biceps brachii, brachialis and coracobrachialis muscles and some neurovascular relations in the anterior compartment. We will then look at the cubital fossa that lies directly anterior to the elbow joint, its boundaries and the contents and then we will finish by looking at the posterior compartment, specifically triceps brachii and again some neurovascular relations. So if we look at the compartments of the arm to start within, this is a section through the arm and we can see that we have got the humerus here and then lying anteriorly we have got this surface here where we have got a subcutaneous tissue and the superficial fascia and then we have got this line here that is running around the muscles and that is the brachial fascia. So we are going to look at that in a bit more detail. When looking at cross sections, it is important to realize as this diagram here indicates that we are actually looking at it from below. So here we are looking at it from below. So this is the medial aspect here, this is the lateral aspect, this is the posterior aspect and this is the anterior aspect. So the transverse section of the arm reveals the brachial fascia forms two muscular compartments. It does this by way of the lateral intermuscular septum and the medial intermuscular septum. So what we can see here is the humerus and then on the outside we have got the brachial fascia....

    About the Lecture

    The lecture Anatomy of the Arm by James Pickering, PhD is from the course Upper Limb Anatomy. It contains the following chapters:

    • Arm in cross-section
    • Anterior compartment
    • Cubital fossa
    • Posterior compartment
    • Neurovasculature relations

    Included Quiz Questions

    1. Musculocutaneous
    2. Median
    3. Radial
    4. Ulnar
    5. Axillary
    1. It is innervated by the radial nerve
    2. Its long head originates from the supraglenoid tubercle of the scapula
    3. It attaches to the radial tuberosity of the radius
    4. It is involved in supination of the forearm
    5. Can flex the forearm at the elbow joint

    Author of lecture Anatomy of the Arm

     James Pickering, PhD

    James Pickering, PhD

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