From Kendra Van Wagner,
Your Guide to Psychology.
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Biopsychology is the branch of psychology that analyzes how the brain and neurotransmitters influence our behaviors, thoughts, and feelings. This field can be thought of as a combination of basic psychology and neuroscience. Many psychology programs use alternate names for this field, including biopsychology, physiological psychology, behavioral neuroscience, and psychobiology. Biopsychologists often look at how biological processes interact with emotions, cognitions, and other mental processes.

If you are interested in the field of biopsychology, then it is important to have an understanding of biological processes, anatomy, and physiology. Three of the most important components to understand are the brain, neurotransmitters, and the nervous system.

The Brain and Nervous Systems

The Central Nervous System is composed of the brain and spinal cord. The outermost part of the brain is known as the cerebral cortex . This portion of the brain is responsible for functioning in cognition, sensation, motor skills, and emotions.

The brain is comprised of four lobes:

1. Frontal Lobe: Also known as the motor cortex, this portion of the brain is responsible for motor skills, higher lever cognition, and expressive language.


2. Occipital Lobe: Also known as the visual corex, this portion of the brain is responsible for interpreting visual stimuli and information.


3. Parietal Lobe: Also known as the somatosensory cortex, this portion of the brain processes other tactile sensory information such as pressure, touch, and pain.


4. Temporal Lobe: Also known as the auditory cortex, this portion of the brain is responsible for interpreting sounds and language we hear.

Another important part of the nervous system is the Peripheral Nervous System, which is divided into two parts:

1. The Somatic Nervous System: Controls the actions of skeletal muscles.


2. The Autonomic Nervous System: Regulates automatic processes such as heart rate, breathing, and blood pressure. There are two parts of the autonomic nervous system:


• The Sympathetic Nervous System: Controls the “fight or flight” reflex. This reflex prepares the body to respond to danger in the environment.


• The Parasympathetic Nervous System: This system works to bring your body back to its normal state after a fight or flight reflex.

Neurotransmitters

Also important in the field of biopsychology are the actions of neurotransmitters. Neurotransmitters carry information between neurons and enable chemical messages to be sent from one part of the body to the brain, and vice versa. There are a variety of neurotransmitters that affect the body in different ways. For example, the neurotransmitter dopamine is involved in movement and learning. Excessive amounts of dopamine have been associated with psychological disorders such as schizophrenia, while too little dopamine is associated with Parkinson’s disease. A biopsychologist might study the various transmitters to determine their effects on human behavior.