While the pupillary light reflex is predominantly controlled by the parasympathetic nervous system, the sympathetic nervous system also plays a vital role in regulating pupil size. The balance between ...

Stem cells in the nervous system are self-renewing cells that have the capacity to produce all, or a restricted set of, the neural cell types (neurons and glia) in the nervous system. Stem cells can ...

Diseases of the nervous system refer to disorders that affect any part of the central nervous system (brain, spinal cord or cranial nerves) or peripheral nervous system. Harmful debris and ...

An illustration of a magnifying glass. An illustration of a magnifying glass.

Disorders affecting the nervous system are diverse and include neurodevelopmental disorders, late-life neurodegeneration, and newly emergent conditions, such as cognitive impairment following COVID-19 ...