nuclei in the spinal cord
31Gray matter — The cortex of the brain which contains nerve cell bodies. The gray matter is in contrast to the white matter, the part of the brain that contains myelinated nerve fibers. The gray matter is so named because it in fact appears gray. The white… …
32Nucleus proprius — The Nucleus proprius is a layer of the spinal cord adjacent to the substantia gelatinosa. Nucleus proprius constitutes the bulk of the dorsal horn and receives inputs from the dorsal root ganglions that carry sensory information, such as light… …
33Mu Opioid receptor — The μ opioid receptors (MOR) are a class of opioid receptors with high affinity for enkephalins and beta endorphin but low affinity for dynorphins. The prototypical μ receptor agonist is the opium alkaloid morphine; μ (mu) refers to morphine.… …
34Menace reflex — The menace reflex is one of three forms of blink reflex. It is the reflex blinking that occurs in response to the rapid approach of an object.[1] The reflex comprises blinking of the eyelids, in order to protect the eyes from potential damage,… …
35Neothalamus — The neothalamus is part of the diencephalon, a portion of the brain of higher organisms including humans. The neothalamus receives input from the thalamus and projects to the association areas of the neocortex. It contains the largest division of …
36nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
37Nucleus — 1) In cell biology, the structure that houses the chromosomes. 2) In neuroanatomy, a group of nerve cells. * * * 1. In cytology, typically a rounded or oval mass of protoplasm within the cytoplasm of a plant or animal cell; it is surrounded by a… …
38tract — An elongated area, e.g., path, track, way. SEE ALSO: fascicle. SYN: tractus. [L. tractus, a drawing out] alimentary t. SYN: digestive t.. anterior corticospinal t. uncrossed fibers forming a small bundle in the anterior funiculus of the …
39nervous system disease — Introduction any of the diseases or disorders that affect the functioning of the human nervous system (nervous system, human). Everything that humans sense, consider, and effect and all the unlearned reflexes of the body depend on the… …
40Corticospinal tract — Pyramidal tract redirects here. This page refers to the nerve fibres underlying the pyramids. For the actual area of the brain, Pyramids, see Pyramid of medulla oblongata. Brain: Corticospinal tract Deep dissection of brain stem. Lateral view. (… …
