The invention is directed to methods for treating nervous system injury and disease, in particular traumatic brain injury and degenerative nervous system disease. Such methods utilize novel compositions, including but not limited to trophic factor-secreting extraembryonic cells (herein referred to as TSE cells), including, but not limited to, amnion-derived multipotent progenitor cells (herein referred to as AMP cells) and conditioned media derived therefrom (herein referred to as amnion-derived cellular cytokine solution or ACCS), each alone or in combination with each other and/or other agents.
