nervous system
101parasympathetic nervous system — noun Date: circa 1934 the part of the autonomic nervous system that contains chiefly cholinergic fibers, that tends to induce secretion, to increase the tone and contractility of smooth muscle, and to slow heart rate, and that consists of a… …
102sympathetic nervous system — noun Date: 1850 the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate compare parasympathetic nervous system …
103Central nervous system depression — or CNS depression refers to physiological depression of the central nervous system that can result in decreased rate of breathing, decreased heart rate, and loss of consciousness possibly leading to coma or death. CNS depression often results… …
104motor nervous system — A part of the nervous system lying entirely within the body that transmits stimuli from the central nervous system to the motor elements of the body …
105parasympathetic nervous system — One of the two divisions of the vertebrate autonomic nervous sytem. Parasympathetic nerves emerge cranially as pre ganglionic fibres from oculomotor, facial, glossopharyngeal and vagus, and from the sacral region of the spinal cord. Most neurons… …
106sympathetic nervous system — One of the two divisions of the vertebrate autonomic nervous system (the other being the parasympathetic nervous system). The sympathetic preganglionic neurons have their cell bodies in the thoracic and lumbar regions of the spinal cord, and… …
107central nervous system — the part of the nervous system comprising the brain and spinal cord. Also called cerebrospinal nervous system. [1890 95] * * * …
108peripheral nervous system — noun The part of the nervous system which is not the central nervous system. Syn: systema nervosum periphericum …
109sympathetic nervous system — noun The part of the autonomic nervous system that under stress raises blood pressure and heart rate, constricts blood vessels and dilates the pupils. See Also: parasympathetic nervous system, sympathectomy …
110somatic nervous system — noun The part of the peripheral nervous system that transmits signals from central nervous system to skeletal muscles, and from receptors of external stimuli thereby mediating sight, hearing and touch …
