This paper reviews artificial neural networks ann and their use in various disciplines especially medicine and biomedicine as they are progressively evolving fields of knowledge and modern methods such as ann help to process information in order to make positive contribution to the development of human knowledge the article illuminates this information processing in terms of artificial neurons and presents the learning algorithms for ann finally its current use is reviewed . This paper reviews artificial neural networks ann and their use in various disciplines especially medicine and biomedicine as these are progressively evolving fields of knowledge modern. Following the intense research activities of the last decade artificial neural networks have emerged as one of the most promising new technologies for improving the quality of healthcare many successful applications of neural networks to biomedical problems have been reported which demonstrate convincingly the distinct benefits of neural networks although many ofthese have only undergone a limited clinical evaluation healthcare providers and developers alike have discovered that . Following the intense research activities of the last decade artificial neural networks have emerged as one of the most promising new technologies for improving the quality of healthcare many successful applications of neural networks to biomedical problems have been reported which demonstrate convincingly the distinct benefits of neural networks although many ofthese have only undergone a limited clinical evaluation healthcare providers and developers alike have discovered that