Progressive Supranuclear Palsy-Pure Akinesia with Gait Freezing Syndrome, also known as psp-pure akinesia with gait freezing, is related to supranuclear palsy, progressive, 1. An important gene associated with Progressive Supranuclear Palsy-Pure Akinesia with Gait Freezing Syndrome is MAPT (Microtubule Associated Protein Tau). Affiliated tissues include globus pallidus and subthalamic nucleus, and related phenotypes are akinesia and freezing of gait