Look up nervous or nervousness in Wiktionary, the free dictionary. Nervous may refer to: Nervousness Nervous system, a network of cells in an animal's...

In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to...

The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain and spinal cord. The CNS is so named because the...

Nervous tissue, also called neural tissue, is the main tissue component of the nervous system. The nervous system regulates and controls body functions...

The sympathetic nervous system (SNS or SANS, sympathetic autonomic nervous system, to differentiate it from the somatic nervous system) is one of the...

autonomic nervous system (ANS), sometimes called the visceral nervous system and formerly the vegetative nervous system, is a division of the nervous system...

parasympathetic nervous system (PSNS or PANS, as in parasympathetic autonomic nervous system, for analogy with the acronym SANS used for the sympathetic nervous system)...

peripheral nervous system (PNS) is one of two components that make up the nervous system of bilateral animals, with the other part being the central nervous system...

Look up nervous breakdown in Wiktionary, the free dictionary. "Nervous breakdown" is a term for a mental disorder with no agreed-upon medical definition...

The enteric nervous system (ENS) or intrinsic nervous system is one of the three main divisions of the autonomic nervous system (ANS), the other being...