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Fig. 666. Transverse sections of the medulla spinalis at different levels

Gray Substance (substantia grisea centralis).—The gray substance consists of two symmetrical portions, one in each half of the medulla spinalis: these are joined across the middle line by a transverse commissure of gray substance, through which runs a minute canal, the central canal, just visible to the naked eye. In a transverse section each half of the gray substance is shaped like a comma or crescent, the concavity of which is directed laterally; and these, together with the intervening gray commissure, present the appearance of the letter H. An imaginary coronal plane through the central canal serves to divide each crescent into an anterior or ventral, and a posterior or dorsal column.



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Reference

Gray H. Anatomy of the human body. (1918) Philadelphia: Lea & Febiger.


Cite this page: Hill, M.A. (2024, April 22) Embryology Gray0666new.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Gray0666new.jpg

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current12:56, 17 October 2012Thumbnail for version as of 12:56, 17 October 2012600 × 551 (47 KB)Z8600021 (talk | contribs)==Fig. 666. Transverse sections of the medulla spinalis at different levels== Gray Substance (substantia grisea centralis).—The gray substance consists of two symmetrical portions, one in each half of the medulla spinalis: these are joined across the m

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