Sympathetic nervous system (redirected from Sympathetics)

sympathetic nervous system

n.

The part of the autonomic nervous system originating in the thoracic and lumbar regions of the spinal cord that in general inhibits or opposes the physiological effects of the parasympathetic nervous system, as in tending to reduce digestive secretions or speed up the heart.

---

Sympathetic nervous system

The part of the autonomic nervous system that is concerned especially with preparing the body to react to situations of stress or emergency; it contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate.

Mentioned in: Antihypertensive Drugs, Hyperhidrosis, Prolonged QT Syndrome, Stress Reduction