Extensor retinaculum

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Extensor retinaculum

a strong fibrous band formed as a thickening of the antebrachial deep fascia, stretching obliquely across the back of the wrist, attaching deeply to ridges on the dorsal aspect of the radius, triquetral and pisiform bones, binding down the extensor tendons of the fingers and thumb.

Synonym: retinaculum extensorum, dorsal carpal ligament, ligamentum carpi dorsale.