Reissner's fiber

Reissner's fiber is a thread-like structure found in the central canal of the spinal cord and the ventricular system of the brain. It is named after Ernst Reissner, a German anatomist who first described it in 1860.

Etymology

The term "Reissner's fiber" is derived from the name of its discoverer, Ernst Reissner (1824–1878). Reissner was a German anatomist who first described this structure in 1860.

Structure

Reissner's fiber is a long, thread-like structure that extends from the lateral ventricles of the brain, through the third ventricle, the cerebral aqueduct, and the fourth ventricle, and into the central canal of the spinal cord. It is composed of a glycoprotein called SCO-spondin, which is secreted by the subcommissural organ (SCO).

Function

The exact function of Reissner's fiber is not fully understood. However, it is believed to play a role in the circulation of cerebrospinal fluid (CSF) and in the development of the central nervous system. Some studies suggest that it may also be involved in the regulation of sleep and wakefulness.

Related Terms

• Subcommissural organ (SCO): A small gland located at the base of the brain that secretes the glycoprotein SCO-spondin, which forms Reissner's fiber.
• Cerebrospinal fluid (CSF): A clear, colorless body fluid found in the brain and spinal cord. It is thought that Reissner's fiber may help to circulate this fluid.
• SCO-spondin: A glycoprotein secreted by the subcommissural organ that forms Reissner's fiber.

See Also

• Central canal
• Ventricular system
• Spinal cord