Complex sentence: He went on to study for a doctorate at Manchester University, where he began his work on animal research, inducing Parkinsonian symptoms in monkeys, either surgically or using drugs, then switching off the symptoms using electrodes he has implanted in their brains.
Split into simpler sentences: He went on to study for a doctorate at Manchester University, where he began his work on animal research. His work involves inducing Parkinsonian symptoms in monkeys, either surgically or using drugs, then switching off the symptoms using electrodes he has implanted in their brains.