January 3, 2026

@michaelokun

A Tribute to Mark Hallett, MD (1943-2025): A life that shaped how we understand movement and the brain. Movement disorders refers to conditions that affect how the brain controls motion including tremor, dystonia, Parkinson’s and beyond. Jankovic and Deuschl describe in a moving tribute, published in Movement Disorders Clinical Practice, the life work and lasting impact of Mark Hallett, a scientist mentor and leader who transformed how health care providers think about motor control and brain physiology. Key Points: - Mark Hallett helped define modern human motor physiology by linking normal brain function to disease. - He pioneered and advanced tools such as transcranial magnetic stimulation that reshaped research and care - His mentorship culture trained generations of investigators who now lead programs across the world. My take: This piece captures something rare. A towering intellect paired w/ humility, curiosity and kindness. Mark taught us that progress comes from asking better questions and from lifting others as you climb. His influence is everywhere in neurology whether obvious or not. Here are 5 points that resonated w/ me: 1- He showed that studying normal brain function is essential to understanding disease. 2- Tools that gently stimulate the brain opened new paths for research and care without surgery. 3- His work connected physiology, imaging and behavior into one much more coherent language. 4- Mentorship mattered as much as discovery and he shaped hundreds of careers and countless patients as well as families. 5- Folks across the world benefit today from ideas he seeded decades ago. RIP my friend and I will never forget the kindness you showed to each and every trainee at the Aspen course. https://movementdisorders.onlinelibrary.wiley.com/doi/10.1002/mdc3.70468 #parkinson #michaelokun #markhallett #fixelinstitute