sentences:  In 1989, Sperry also received the National Medal of Science.Afterwards in 1993, Sperry received the Lifetime Achievement Award from APA.In addition to his contribution in establishing the lateralized function of the brain, Sperry is noted for his "chemoaffinity hypothesis", which has not only been influential in formation of testable hypotheses in how precise neuronal wiring diagram is established in the brain, but the hypothesis itself has been verified by numerous experiments.