Sulcus limitans

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Sulcus limitans

Sulcus limitans (pronunciation: /ˈsʌlkəs lɪˈmɪtæns/) is a longitudinal groove in the rhombencephalon (or hindbrain) of the developing vertebrate nervous system. It separates the alar plate and basal plate, which are involved in different aspects of sensory and motor function, respectively.

Etymology

The term "sulcus limitans" originates from Latin, where "sulcus" means groove and "limitans" means limiting. Thus, it refers to the limiting groove that separates two important areas of the developing brain.

Function

The sulcus limitans plays a crucial role in the development of the nervous system. It separates the alar plate, which gives rise to sensory neurons, from the basal plate, which gives rise to motor neurons. This separation is essential for the proper functioning of the nervous system, as it ensures that sensory and motor functions are distinct.

Related Terms

  • Rhombencephalon: The hindbrain, which is the part of the brain that the sulcus limitans is found in.
  • Alar plate: The dorsal (rear) part of the neural tube that develops into sensory neurons.
  • Basal plate: The ventral (front) part of the neural tube that develops into motor neurons.
  • Neural tube: The embryonic structure that develops into the brain and spinal cord.
  • Neuron: A nerve cell that is the basic building block of the nervous system.

See Also

External links

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