HELLO FRIEND HERE IS YOUR ANSWER. Neurodegeneration with brain iron accumulation (NBIA) is a GROUP of inherited neurological disorders in which iron ACCUMULATES in the BASAL ganglia, RESULTING in progressive dystonia, Parkinsonism, spasticity, optic atrophy or retinal degeneration and neuropsychiatric abnormalities. i HOPE it will help you. ★_________★___________★