reticular formation (redirected from Formatio reticularis)

formation /for·ma·tion/ (for-ma´shun)

1. the process of giving shape or form; the creation of an entity, or of a structure of definite shape.

2. a structure of definite shape.

---

reaction formation  a defense mechanism in which a person adopts conscious attitudes, interests, or feelings that are the opposites of their unconscious feelings, impulses, or wishes.

reticular formation  any of several diffuse networks of cells and fibers in the spinal cord and brainstem; subdivided into the reticular formations of the spinal cord, medulla oblongata, mesencephalon, and pons.

---

reticular formation

n.

A massive but vaguely delimited neural apparatus composed of closely intermingled gray and white matter, extending the length of the spinal cord and into the diencephalon, and having a dominant role in the central control of autonomic and endocrine functions, bodily posture, skeletomuscular reflex activity, and general behavioral states. Also called reticular substance.

---

reticular formation,

a small, thick cluster of neurons nestled within the brainstem, including the medulla that controls the level of consciousness and other vital functions of the body. The reticular formation constantly monitors the state of the body through connections with the sensory and motor tracts. Certain nerve cells in the formation regulate the flow of hydrochloric acid in the stomach. Other cells regulate swallowing, tongue movements, and movements of the face, eyes, and tongue.