RfWordNet Explorer

a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone

any network of neurons or nuclei that function together to perform some function in the body

the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus

the network in the reticular formation that serves an alerting or arousal function

a radioactive transuranic element which has been synthesized

any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland

anything that contributes causally to a result