Anatomy of the forearm and hand: the forearm

Published on February 26, 2026   32 min

Other Talks in the Series: Introduction to Gross Anatomy for Medicine

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0:00
Hello. I'm Nihal Apaydin from Ankara University, Faculty of Medicine, and I'm a full professor of anatomy in the Department of Anatomy. I'm going to talk about the anatomy of the forearm and the hand in this presentation.
0:16
I have split my talk into two parts. In the first part, I'm going to be covering the forearm and give you information about the bones, joints, muscles, and movements of the forearm. I will briefly mention about the vascular supply and innervation of the forearm. In the second part, I will be covering the wrist and hand, and talk about the bones, joints, muscles, and movements of the hand. After this, I will explain the structures in the hand, just like carpal tunnel, and then I will be briefly mentioning about the vascular supply and innervation of the hand. At the final part of the second part, I will summarize the surface anatomy of the forearm and the hand, and I will try to provide you an anatomical overview of clinical cases related with forearm, wrist, and the hand, and I will finalize my talk with a conclusion.
1:15
Now, let's get started with the first part, the forearm.
1:20
The forearm is the part of the upper limb that extends between the elbow and wrist joints. The bone framework of the forearm consists of two parallel bones, the laterally located radius and the medially located ulna. The radius is small proximally, where it articulates with the humerus, and wider distally, where it forms the wrist joint with the carpal bones of the hand. The ulna is large proximally and small distally. Just reverse all those for radius. Proximal and distal radioulnar joints allows the radius to swing over the adjacent ulna resulting in pronation and supination of the hand. The radius and ulna are linked by an interosseous membrane along most of their length. This interosseous membrane and the lateral intermuscular septum and also the attachment of the deep fascia along the posterior border of the ulna divides the forearm into anterior and posterior compartments as in the arm. The muscles, major nerves, and vessel supply all pass through each compartment, which we will discuss later. The radius consists of

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Anatomy of the forearm and hand: the forearm

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