The interosseous membrane is a thick dense fibrous sheet of connective tissue that spans the space between two bones forming a type of syndesmosis joint.Five ligaments of interosseous membrane of forearm:* Central band (key portion to be reconstructed in case of injury)* Accessory band * Distal oblique bundle * Proximal oblique cord* Dorsal oblique accessory cord The interosseous membrane is a thick dense fibrous sheet of connective tissue that spans the space between two bones forming a type of syndesmosis joint.