Complex sentence: It is a multidisciplinary branch of biology, that deals with the anatomy, biochemistry, molecular biology, and physiology of neurons and neural circuits while drawing upon fields including mathematics, pharmacology, physics, engineering, and psychology.
Split into simpler sentences: It is a multidisciplinary branch of biology, that deals with the anatomy, biochemistry, molecular biology, and physiology of neurons and neural circuits. It also draws upon fields including mathematics, pharmacology, physics, engineering, and psychology.