neural groove

neural groove

n.

The gutterlike groove formed in the midline of the embryo's dorsal surface by the progressive elevation of the lateral margins of the neural plate, resulting in the formation of the neural tube. Also called medullary groove.

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neural groove,

the longitudinal depression that occurs between the neural folds during the invagination of the neural plate to form the neural tube in the early stages of embryonic development. Also called medullary groove. See also neural tube formation.

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neural

pertaining to a nerve or to the nerves.

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neural crest cells

a group of neuroepithelial cells which condenses dorsal to the neural tube in the embryo; they subsequently migrate and set up dorsal root ganglia, the ganglia of the autonomic nervous system, and the pigment cells of the integument (melanocytes).

neural folds

in the embryo, the sides of the invaginated neural plate that meet and fuse over the neural groove to form the neural tube.

neural groove

the longitudinal furrow in the neural plate of the embryo.

neural lymphomatosis

see marek's disease.

neural plate

the thickened ectoderm dorsal to the notochord in the embryo that gives rise to the neural tube.

neural retina

separated from the outer layer of the optic retina by the intraretinal space; constitutes the pars optica retinae, with its neuroepithelial layer (contains rods and cones—the receptor cells), bipolar ganglion layer, multipolar ganglion layer, and a layer of axons of the latter layer. Light must pass through the latter three layers before reaching the receptor cells.

neural substrates

functional units of the central nervous system, often composed of a series of structural units which may be widely separated anatomically but which interact to support or drive complex nervous system functions, such as hunger and sleepiness. They are the counterparts of simple centers, e.g. the respiratory center, which control simple physiological mechanisms.

neural tropic influence

the tropic influence of nerves on, for example, muscle, demonstrated by the atrophy of muscle when it is denervated.

neural tube

the precursor of the central nervous system in the embryo, formed by invagination and fusion of the neural plate.