Alar plate
Alar Plate
The Alar Plate (pronunciation: /ˈælər pleɪt/) is a crucial structure in the embryonic development of the Central Nervous System (CNS).
Etymology
The term "Alar" is derived from the Latin word 'ala', meaning 'wing', and "Plate" from the Old French 'plate', meaning 'flat piece'. The name is indicative of the structure's wing-like appearance in the developing neural tube.
Definition
The Alar Plate is the dorsal (rear) part of the neural tube in the developing embryo. It differentiates into sensory regions of the CNS. The Alar Plate and its counterpart, the Basal Plate, are separated by the sulcus limitans.
Development
During embryonic development, the Alar Plate gives rise to neurons that will eventually form the sensory systems, including the auditory system, somatosensory system, and visual system.
Related Terms
- Neural Tube: The embryonic structure that eventually forms the brain and spinal cord.
- Basal Plate: The ventral (front) part of the neural tube, which differentiates into motor regions of the CNS.
- Sulcus Limitans: A groove in the neural tube that separates the Alar Plate from the Basal Plate.
- Central Nervous System: The part of the nervous system consisting of the brain and spinal cord.
External links
- Medical encyclopedia article on Alar plate
- Wikipedia's article - Alar plate
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