[PATIENTS]  Inclusion Criteria:  Has ALS, classified as definite, probable, laboratory-supported probable, or possible ALS according to the revised El Escorial criteria or a related neurodegenerative disorder including ALS-FTD, PLS, PMA or asymptomatic individuals with a known ALS mutation (as previously confirmed during regular clinical care) Be of the age of majority in their province of residence/treatment Have the cognitive capacity to provide informed consent Have proficiency in English or French in order to understand study instructions and respond to questionnaires  Exclusion Criteria:  N/A  [HEALTHY CONTROLS]  Inclusion Criteria:  Be between the ages of 40-80 unless age matched to a patient (+/-3 years) who is already enrolled Be the age of majority in their province of residence/treatment Have the cognitive capacity to provide informed consent Have proficiency in English of French to understand study instructions and respond to questionnaires  Exclusion Criteria:  A history of a neurological disease, including Central Nervous System disease (e.g., stroke, head injury, epilepsy) or Peripheral Nervous System disease (neuropathy, myopathy) A history of psychiatric disease (e.g. depression, bipolar disease) that is clinically diagnosed and/or with the current use of psychiatric medications (e.g. antidepressants) for an indication of a psychiatric disease. Subjects ineligible for an MRI due to a pacemaker or other contraindication according to local MRI policies of the study centre. Significant claustrophobia that would prohibit an MRI (subjects will be required to lie in an MRI scanner for approximately one hour).