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A human's nervous system is in charge of managing our cognitions, movements, and responses. It is comprised of billions of neurons, glial cells, and the central and peripheral nervous systems. 

Nervous System

The nervous system's capacity to change and adapt is known as neuroplasticity. This adaptation can be triggered by various factors, such as personal experiences, normal developmental stages, or in response to damage or injury. The underlying mechanisms of neuroplasticity include the formation of new synapses, the elimination of unused ones, modifications in glial cells, and even the generation of new neurons. While the brain's plasticity is at its peak during early life, it retains a significant capacity for change and reorganization throughout adulthood.

Neuroplasticity

Psychologists who aim to study the human mind require a basic understanding of the two primary subdivisions of the nervous system:
- Central Nervous System (CNS)
- Peripheral Nervous System (PNS) 

Parts of the Nervous System

Neurons are specialized cells located in the nervous system that send information between different parts of the body and the brain.

Neurons

The hypothalamus is a brain structure that regulates various homeostatic processes, including blood pressure, appetite, and body temperature. It serves as an interface between the nervous system and the endocrine system, and it controls the hormonal secretions of the pituitary gland. Furthermore, it is involved in regulating sexual behavior and motivation.

Hypothalamus

The nervous system is structurally divided into two major subdivisions: the central nervous system (CNS) and the peripheral nervous system (PNS). Visual illustrations typically distinguish these two by depicting the brain and spinal cord for the CNS, and the extensive network of connecting nerves throughout the body for the PNS.

Two Major Subdivisions of the Nervous System

Imagine a person accidentally touches a hot pan. They instantly withdraw their hand. Which statement best breaks down how their nervous system coordinated this rapid, involuntary response?

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