Neurology | Brachial Plexus

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Ninja Nerds!
Join us in this lecture where Professor Zach Murphy will be breaking down the anatomy and organization of the brachial plexus, the complex network of nerves responsible for motor and sensory innervation to the upper limb. We start by outlining its formation from the anterior rami of spinal nerves C5 through T1 and walk through the classic structure from roots to trunks, divisions, cords, and branches. The relationships between these components are visualized to help you understand how this intricate arrangement organizes signals for precise control and sensation in the arm, forearm, and hand.

We then examine the major terminal branches—the musculocutaneous, axillary, radial, median, and ulnar nerves—detailing their primary motor functions and sensory territories. Key anatomical landmarks, such as the scalene muscles, clavicle, and axilla, are discussed to reinforce spatial orientation.

Finally, we connect this anatomy to its functional importance, explaining how the brachial plexus supports coordinated upper limb movements and reflexes. We highlight how its organization allows for redundancy and adaptability in nerve supply, ensuring resilience against minor injuries.

Enjoy the lecture and support us below!

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