The field of behavioral neuroscience is the broader contemporary development of the earlier field of physiological psychology, the original field of psychology as in the writings of Wilhelm Wundt and William James. Today it is concerned with the neural and biological bases of behavior, including effects of lesions and electrical stimulation, recording of electrical activity, genetic factors, hormonal influences, neurotransmitter and chemical factors, neuroanatomical substrates, effects of drugs, developmental processes, and environmental factors. In short, behavioral neuroscience is that aspect of the broad, interdisciplinary field of neuroscience concerned with the biological bases of behavior. On the other hand, the field of cognitive neuroscience is that aspect of the field of neuroscience concerned with the more complex phenomena of mind and brain, particularly for the human animal