hi bob...here are some recent articles re: PD and brain tissue transplants. i am a cognitive psychologist who does research with AD and PD patients,as well as other diseases (MS, etc.)...hope you enjoy these articles... lindvall, o., brundin, p., widner, h., et al (1990). grafts of fetal dopamine neuron survive and improve motor function in PD. science, 247, 574-577. spencer, d.d., robbins, r.j., naftolin, f. et al (1992). unilateral transplantation of human fetal mesencephalic tissue into the caudate nucleus of patients with PD. new england journal of medicine, 327, 1541-1548 widner, h., tetrud, j., rehncrona, s., et al (1992). bilateral fetal mesencephalic grafting in two patients with PD induced by 1-methy-4- phenyl-1,2,3,6-tetrahydropyridine (mtpt). new england journal of meddicine, 327, 1556-1563.