The Atlantic reports on how a low dose of electrical current is helping some patients overcome tiredness and cognition problems.

The treatment was part of a study performed by Leigh Charvet, a neurologist at New York University’s Langone Medical Center. It was meant to see if transcranial direct current stimulation, a brain treatment also known as tDCS, could be used remotely to relieve the brain fog and oppressive fatigue that many MS patients suffer.