The principle in neuropsychology that, within certain limits, different parts of the brain are capable of performing similar functions, and if one of them is damaged, the other can partially take over its role. The concept was proposed by Carl Lashley in the early 20th century on the basis of experiments that showed that brain damage does not always cause strictly specific disorders, which indicates functional redundancy and adaptability. Modern neuroscience recognizes a large specialization of brain regions, but the principle of equipotentiality remains important for understanding neuroplasticity and recovery from injuries.