Compounds and methods for increasing neurogenesis

A method for increasing neurogenesis in neural tissue of a patient exhibiting at least one symptom of a central nervous system disorder selected from the group consisting of neurodegenerative disorders, ischemic disorders, neurological traumas, and learning and memory disorders, comprising:

• administrating at least one agent selected from the group consisting of calcitonin, exendin and their analogs that elevate intracellular cAMP levels in the tissue, wherein the agent increases neurogenesis in the patient, thereby increasing neurogenesis in the neural tissue of the patient.