transition gyrus

tran·si·tion gyrus

(trăn-zĭsh′ən)
n.
A small convolution connecting two lobes or two main gyri in the depth of a sulcus. Also called annectent gyrus.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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