Dictionary > Fasciculus of Lissauer

Fasciculus of Lissauer

Definition
noun
A small bundle of fibers situated longitudinally in the white matter, at the entrance of the dorsal root fibers at the dorsolateral sulcus
Supplement
The fasciculus of Lissauer is a small bundle of fibers containing centrally projecting axons from dorsal root ganglion cells. It runs longitudinally in the white matter and located in the dorsal part of the lateral funiculus. It was first described by German neurologist, Heinrich Lissauer (1861-1891).
The fasciculus of Lissauer occurs throughout the spinal cord, and is most developed in the upper cervical regions. It contains axons from the dorsal root ganglion cells associated with pain and temperature.1
It also contains several fine non-myelinated fibers that are derived mostly from the dorsal roots (i.e. partly endogenous in origin), and are intimately related to the substantia gelatinosa.1, 2
Synonym(s):

  • fasciculus of Lissauer
  • Lissauer’s tract
  • tract of Lissauer
  • dorsolateral fasciculus
  • dorsolateral tract
  • zone of Lissauer

See also:

  • non-myelinated fiber
  • axon
  • dorsal root ganglion
  • white matter
  • Reference(s):

    1 Posterolateral tract. Retrieved from https://en.wikipedia.org/wiki/Posterolateral-tract

    2 Wall PD, Lidierth M, Hillman P (December 1999). “Brief and prolonged effects of Lissauer tract stimulation on dorsal horn cells”. Pain 83 (3): 579–89.


    You will also like...

    Developmental Biology
    Developmental Biology

    Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..

    A sperm cell fertilizing an ovum
    Human Reproduction and Fertilization

    For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    Gene Pool and Speciation
    The Gene Pool and Population Genetics

    According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

    Crossing Over and Genetic Diversity
    Inheritance and Probability

    Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..

    kinesin motor proteins transporting molecules across microtubules
    Movement of Molecules Across Cell Membranes

    Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..