This month, genetic counselling for amyotrophic lateral sclerosis (ALS). Adriano Chiò, Turin ALS Expert Center, ‘Rita Levi Montalcini’ University of Turin, tells us what it can and can't do, who should have it, and how to go about it.

And deep brain stimulation for essential tremor. Joseph Jankovic, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, explains what his study on long-term outcomes reveals.

Read the papers:

Genetic counselling in ALS: facts, uncertainties and clinical suggestions http://goo.gl/bYaqtQ

The safety and efficacy of thalamic deep brain stimulation in essential tremor: 10 years and beyond http://goo.gl/OhCsIh