Magnocellular cell

Neuron: Magnocellular cell
NeuroLex ID nifext_42
v · d · e

Magnocellular cells, also called M-cells, are neurons located within the magnocellular layer of the lateral geniculate nucleus of the thalamus. The cells are part of the visual system. They are termed "magnocellular" since they are characterized by their relatively large size compared to parvocellular cells.

Contents

Visual system

Schematic diagram of the primate LGN.

Magnocellular cells are primarily concerned with visual perception.[1] In particular these cells are responsible for resolving motion and coarse outlines. The M-cells receive their information from the axons of parasol cells exiting the optic tract. The M-cells are large, fast-conducting neurons with their cell bodies located in the 2 ventral magnocellular layers of the lateral geniculate nucleus. The information they carry is sent through the optic radiations to the visual cortices, possibly after editing and gating by visual cortex exerting top-down control. The M-cells feed more to the parietal cortices, in the dorsal "where" stream, than the temporal cortices, destination of the ventral "what" stream. This is consistent with their coding of movement and edges as opposed to fine detail. This system of cells operates with great speed at the expense of detail.

See also

  • Parvocellular cell
  • Koniocellular cell

References

External links



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Magnocellular — can refer to: Magnocellular cell, part of visual system Magnocellular red nucleus Magnocellular neurosecretory cell Magnocellular pathway Magnocellular theory of dyslexia This disambiguation page lists articles associated with the same title. If… …   Wikipedia

  • Magnocellular neurosecretory cell — Not to be confused with Magnocellular cell. Magnocellular neurosecretory cells are large cells within the supraoptic nucleus and paraventricular nucleus of the hypothalamus. They are also found in smaller numbers in accessory cell groups between… …   Wikipedia

  • Magnocellular part — Magnocellular parts, also called M cells, are cells in the brain concerned primarily with visual perception. In particular these cells are responsible for resolving motion and coarse outlines. The cells have large, fast conducting neurons and… …   Wikipedia

  • Magnocellular red nucleus — The magnocellular red nucleus (RNm) is located in the rostral midbrain and is involved in motor coordination. Together with the parvocellular red nucleus, it makes up the red nucleus.[1] References ^ Yamaguchi K, Goto N (August 2006). Development …   Wikipedia

  • magnocellular — ¦magnōˌ adjective Etymology: Latin magnus large + English o + cellular more at much : being or containing neurons with large cell bodies motion and depth perception processed by the magnocellular visual pathway neurosecretory magnocellular… …   Useful english dictionary

  • magnocellular — Composed of cells of large size. [L. magnus, large, + cellular] * * * mag·no·cel·lu·lar .mag nō sel yə lər adj being or containing neurons with large cell bodies <motion and depth perception processed by the magnocellular visual pathway>… …   Medical dictionary

  • List of topics in cell biology — Cell invokes a major branch of theory and research known variously as cell biology, cellular biology or cytology. The study of cell tissues is known as histology. Cell types are often referred to using the suffixes blast, clast, cyte, especially… …   Wikipedia

  • Ganglion cell — Infobox neuron neuron name = Ganglion cell image neuron = Gray624.png caption neuron = Various forms of nerve cells. A. Pyramidal cell. B. Small multipolar cell, in which the dendrites quickly divides into numerous branches. C. Small fusiform… …   Wikipedia

  • List of distinct cell types in the adult human body — There are about 210 distinct human cell types,.[1][2][3] There are between 50 and 75 trillion cells in the human body.[citation needed] Cell types can be classified by their tissue of origin. However, it is possible for some cells to have their… …   Wikipedia

  • Amacrine cell — Infobox neuron neuron name = Amacrine cell image neuron = Amacrine.png caption neuron = Xenopus retinal cells stained for cdk2/cyclin2 with red arrow indicating amacrine cell. IPL is shown in white. location = INL of the retina function =… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.