Biological psychology
Biological psychology or Behavioral Neuroscience is the scientific study of the biological substrates of behavior and mental states. Seeing all behavior as intertwined with the nervous system, biological psychologists feel it is sensible to study how the brain functions in order to understand behavior.
This is the approach taken in behavioral neuroscience, cognitive neuroscience, and neuropsychology. Neuropsychology is the branch of psychology that aims to understand how the structure and function of the brain relate to specific behavioral and psychological processes.
Neuropsychology is particularly concerned with the understanding of brain injury in an attempt to work out normal psychological function. Cognitive neuroscientists often use neuroimaging tools, which can help them to observe which areas of the brain are active during a particular task.
MRI depicting the human brain.
The arrow indicates the position of the hypothalamus