Definition

Noun: A hollow, tubular structure of ectodermal tissue that forms in the early embryo of vertebrates. It is the embryonic precursor to the central nervous system, developing into the brain and spinal cord.

Usage

The term "neural tube" is used primarily in the fields of embryology, developmental biology, and medicine. It describes a specific, transient anatomical structure critical to proper fetal development. Its formation (neurulation) and subsequent closure are key developmental events.

Examples

• In Embryology:

  • The neural tube forms during the fourth week of human embryonic development.
  • Proper closure of the neural tube is essential for preventing birth defects.

• In a Medical Context:

  • Folic acid supplementation is recommended to reduce the risk of neural tube defects.
  • An ultrasound can sometimes detect abnormalities in the neural tube.

Advanced Usage

• "Neural tube closure": The process by which the edges of the neural plate fuse to form the sealed tube. Failure of this process leads to neural tube defects.

  • The research focuses on the genetic factors influencing neural tube closure.

• "Neural tube defect (NTD)": A class of congenital malformations of the brain and spinal cord that result from the neural tube failing to close completely during early pregnancy. Examples include spina bifida and anencephaly.

  • Screening for neural tube defects is a standard part of prenatal care.

Variants and Related Words

• Neural (adj): Pertaining to nerves or the nervous system.

  • Neural pathways are essential for signal transmission.

• Neurulation (n): The embryological process of forming the neural tube.

  • Neurulation is a critical phase in vertebrate development.

• Ectoderm (n): The outermost of the three primary germ layers in the early embryo, which gives rise to the neural tube, skin, and nervous system.

  • The neural tube is derived from the ectoderm.

Synonyms

• Neural canal (in specific embryological contexts, though "neural tube" is the more precise and common term).

Related Phrases

• "Anterior neuropore": The temporary opening at the head (rostral) end of the neural tube before it closes.

  • Closure of the anterior neuropore forms the future brain.

• "Posterior neuropore": The temporary opening at the tail (caudal) end of the neural tube before it closes.

  • Defects in the closure of the posterior neuropore can lead to spina bifida.

Noun

1. a tube of ectodermal tissue in the embryo from which the brain and spinal cord develop