释义 |
excitor noun[ C ] anatomy specializeduk /ɪkˈsaɪ.tər/ us /ɪkˈsaɪ.t̬ɚ/ a nerve that sends signals that cause increased activity in a part of the body: A common excitor innervates all four of these muscles. Two types of nerves dominate this pathway, afferent nerves or receptors, and efferent nerves or excitors. The ventral excitor neurons excite the dorsal inhibitors. The reflex pathway consists of at least one afferent neuron also known as a receptor, and one efferent, also known as an excitor neuron. SMART Vocabulary: related words and phrases The brain & nervous system abducens nerve abducent nerve accessory nerve alexithymia allism grey matter hemispheric hemispherical hindbrain hippocampus neurogenic neurogenically neuroglia neuroglial neurohormonal reticular formation rhinencephalon rhombencephalon right brain right-brained |