neuromeres


neuromeres
Alternate swellings and constrictions seen along the neuraxis at early stages of neural tube development, thought to be evidence of intrinsic segmentation in the central nervous system. Neuromeres or segments in the hindbrain region are called rhombomeres and have been shown to be lineage-restriction units, each constructing a defined piece of hindbrain.

Dictionary of molecular biology. 2004.

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  • Neuromere — Neuromeres are morphologically or molecularly defined transient segments of the early developing brain. Rhombomeres are such segments that make up the rhombencephalon or hindbrain. More controversially, some argue that there exist early… …   Wikipedia

  • rhombomere — Neuromeres or segments in the hindbrain region that are of developmental significance. Shown to be lineage restriction units in that cells of adjacent rhombomeres do not mix with each other. Regulatory genes have been shown to be expressed in… …   Dictionary of molecular biology

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  • Rhombomere — In the vertebrate embryo, a rhombomere is a transiently divided segment of the developing neural tube (a neuromere) in the area that will eventually become the rhombencephalon. The rhombomeres appear as a series of slightly constricted swellings… …   Wikipedia

  • Tectospinal tract — Diagram showing possible connection of long descending fibers from higher centers with the motor cells of the ventral column through association fibers. ( Tectospinal fasciculus labeled at center right.) …   Wikipedia

  • Prenatal development — This article is about prenatal development of human embryos and fetuses. For other species, see prenatal development (non human). For maternal changes in the prenatal period, see Maternal physiological changes in pregnancy. Prenatal or antenatal… …   Wikipedia

  • procephalic lobes — (ARTHROPODA: Insecta) In embryology of the cephalic region, expansion of the neural ridges forming the future brain and divided into three neuromeres, known as proto , deuto and tritocerebrum; procephalon …   Dictionary of invertebrate zoology


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