<prompt> All are true about Huntingtons disease except:ChoreaBehavioral disturbanceEarly onset of memory lossCog-wheel rigidity.  <response>: Answer is C Early onset memory loss: Memory loss is frequently not impaired until late in the disease Memory loss is frequently not impaired until late in the disease, although attention judgement executive functions may be seriously deficient at an early stage. Involvement of extrapyramidal system caudate nucleus may explain cog wheel rigidity. 