Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Rhesus monkey, 10% formalin, Bodian* silver, 49 x.
Lamination is a major characteristic of cortical structure. Six horizontal laminae distinguish the neocortex. Laminae are differentiated by the type, density, and arrangement of cells. The six laminae seen in this plate are, from the surface of the cortex to the white matter, as follows.
I-Molecular layer or plexiform layer: Contains few cells and a rich nerve fiber plexus made up of axons and dendrites of cells in other laminae as well as cells in this lamina.
II-External granular layer: Closely packed small neurons.
III-External pyramidal layer: Composed mainly of pyramidal neurons and many granule cells and cells of Martinotti.*
IV-Internal granular layer: Composed chiefly of stellate cells that are closely packed.
V-Internal pyramidal or ganglionic layer: Consists of medium-sized and large pyramidal cells intermingled with granule cells.
VI-Multiform layer or layer of fusiform cells: Contains a variety of cell types.
White matter: Contains incoming and outgoing nerve fibers.
*Bodian is a twentieth-century American neuroanatomist and Martinotti (1857-1928) was an Italian physician.
Next Page | Previous Page | Section Top | Title Page
Please send us comments by filling out our Comment Form.
All contents copyright © 1995-2017 the Author(s) and Michael P. D'Alessandro, M.D. All rights reserved.
"Anatomy Atlases", the Anatomy Atlases logo, and "A digital library of anatomy information" are all Trademarks of Michael P. D'Alessandro, M.D.
Anatomy Atlases is funded in whole by Michael P. D'Alessandro, M.D. Advertising is not accepted.
Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.
The information contained in Anatomy Atlases is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.