 The purpose of the study is to determine if we are able to find one or more biomarkers of Amyotrophic Lateral Sclerosis ALS and Primary Lateral Sclerosis PLS using magnetic resonance imaging MRI scans at different levels, 3 tesla 3T and 7 tesla 7T. A biomarker is a measurable characteristic that can be used as an indicator of a particular disease state. Identifying biomarkers of a disease can lead to a better understanding of the disease as well as improved treatments. This study will enroll patients with ALS, PLS, and healthy controls. 