Interosseousmembrana

The interosseous membrane is a broad, sheet-like layer of fibrous connective tissue that separates two parallel bones in the body. These membranes are crucial for stabilizing the bones and providing broad surfaces for muscle attachment. The most prominent interosseous membranes are found in the forearm, between the radius and ulna, and in the leg, between the tibia and fibula.

In the forearm, the antebrachial interosseous membrane connects the shafts of the radius and ulna. This structure plays a vital role in maintaining the distance between these two bones, which is essential for the complex movements of pronation and supination. It also prevents the bones from impinging on each other during these actions and serves as an attachment site for deep muscles of the forearm.

Similarly, the crural interosseous membrane is located between the tibia and fibula in the lower leg. It reinforces the tibiofibular syndesmosis, a type of fibrous joint, and contributes to the structural integrity of the leg. This membrane also divides the muscles of the leg into anterior and posterior compartments, providing origins for several key muscles involved in ankle and foot movement. Injuries to interosseous membranes, such as tears or ruptures, can result from trauma and can lead to pain, instability, and functional impairment.