Interosseous membrane

• Strong fibrous sheet between interosseous borders of radius and ulna
• Direction of fibres: downwards and medially in an oblique fashion
• Transmits forces from hand to radius, ulna and humerus
• Tightest in mid-position
• Oblique cord superiorly and opening distally for vessels to pass
• Functions:

  • Divides forearm into anterior and posterior compartments

  • Shock absorption and dissipation

  • Attachment site for deep muscles