b'Scientist Scientist Frank Middleton, PhD Frank Middleton, PhD, tells about a new way to identify concussions. Psychologist, tells about a new way to identify concussions. Psychologist Jeffrey Schweitzer, PhD, Jeffrey Schweitzer, PhD, and doctoral student Brian Arizmendi discuss grief and loss. Registered dietitian nutritionist Maria Erdman explains macrobiotic diets. and doctoral student Brian Arizmendi discuss grief and loss. Registered dietitian nutritionist Maria Erdman explains macrobiotic diets.'