New Formulation and Food Effect Study of BIIB074

Key Inclusion Criteria: * Must have a body mass index between 18 and 30 kg/m2, inclusive. * Must be in good health as determined by the Investigator, based on medical history and screening evaluations. * Ability to consume and tolerate the entire high-fat breakfast within a 30-minute timeframe. Key Exclusion Criteria: * History of, or positive test result at Screening for, human immunodeficiency virus (HIV). * Positive test result at Screening for hepatitis C virus antibody. * Positive test result at Screening for hepatitis B virus (defined as positive for hepatitis B surface antigen and/or hepatitis B core antibody). * Previous exposure to BIIB074. * Consumption of xanthine/caffeine-containing products (e.g., energy drinks, coffee, tea, caffeinated soda) within 48 hours of Day -1 and an unwillingness to refrain from product use during study participation. * History of alcohol or substance abuse (as determined by the Investigator), a positive urine drug screen or alcohol breath test at Screening or Day -1, or an unwillingness to refrain from alcohol, or illicit or recreational drugs, during the study. * History or evidence of habitual use of tobacco- or nicotine-containing products within 90 days of Screening, or a positive cotinine screen at Screening or Day -1. Note: Other protocol defined Inclusion/Exclusion criteria may apply