antebrachial flexor retinaculum
an·te·brach·i·al flex·or ret·i·nac·u·lum
thickening of distal antebrachial fascia just proximal to radiocarpal (wrist) joint. Continuous with extensor retinaculum at margins of forearm. This structure is distinct from the transverse carpal ligament, commonly called "the flexor retinaculum," which forms the roof of the carpal tunnel.
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