Space of Poirier

*Space of Poirier:

Diagram of arcuate ligament (greater arc, zone of fractures and dislocations),
lesser arc (zone of dislocations), and
space of Poirier (vulnerable zone between greater and lesser arcs),

superimposed on wrist radiograph.

>Fibers of radioscaphocapitate ligament (yellow) and
ulnocapitate ligament (purple) interdigitate and form an arclike ligamentous structure, termed the arcuate ligament, in the greater arc region (black line). Note lesser arc that outlines the lunate (dashed red line).
>The scapholunate ligament and lunotriquetral ligament are part of the lesser arc, which does not extend to the distal radius and ulna.

*{The space of Poirier (white arrows) is located between the lesser and greater arcs.}