superior extensor retinaculum

su·pe·ri·or ex·ten·sor ret·i·nac·u·lum

[TA] the ligament that binds down the extensor tendons proximal to the ankle joint; it is continuous with (a thickening of) the deep fascia of the leg. Synonym(s): retinaculum musculorum extensorum superius [TA], ligamentum transversum cruris, superior retinaculum of extensor muscles, transverse crural ligament, transverse ligament of leg

su·pe·ri·or ex·ten·sor ret·i·nac·u·lum

(sŭ-pēr'ē-ŏr eks-ten'sŏr ret'i-nak'yū-lŭm) [TA] The ligament that binds down the extensor tendons proximal to the ankle joint; it is continuous with a thickening of the deep fascia of the leg.