Perilunate dislocations are a type of wrist injury where the alignment of the bones deviates from their normal position. In the human wrist, the bones typically involved are the radius (part of the forearm), the scaphoid and capitate (carpal bones), and the lunate.
In a perilunate dislocation, the lower radius, scaphoid, and capitate are aligned correctly, while the lunate bone is displaced, or "out of plane." This can be a serious injury that may affect wrist function and requires prompt surgical intervention.
Thus, in the context of the provided options, the correct understanding of a perilunate dislocation aligns with: Lower radius, scaphoid and capitate in alignment, lunate alone out of plane.
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