Chapter

Middle Longitudinal Fasciculus

Jeremy D. Schmahmann and Deepak N. Pandya

in Fiber Pathways of the Brain

Published in print April 2006 | ISBN: 9780195104233
Published online May 2009 | e-ISBN: 9780199864294 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195104233.003.0015
 Middle Longitudinal Fasciculus

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This chapter discusses the results of the investigation of the middle longitudinal fasciculus (MdLF) of rhesus monkey brains. Observations confirm the presence of the MdLF pathway that lies in the white matter of the superior temporal gyrus (STG) and extends from the caudal end of the STG to the temporal pole. In addition to the fibers within the MdLF that arise in the caudal inferior parietal lobule and terminate in the STG and the cortex of the superior temporal sulcus, researchers observed that the MdLF conveys fibers from the caudal cingulated gyrus and the middle sector of the parahippocampal gyrus toward the multimodal cortex (area TPO and PGa) in the upper bank of the superior temporal sulcus. Further, the MdLF links caudal with rostral sectors within the superior temporal region itself. In addition, fibers arise from the lateral and orbital prefrontal cortices and travel caudally first in the extreme capsule, and then within the MdLF to terminate in area TPO.

Keywords: rhesus monkey brain; MdLF pathways; superior temporal gyrus; white matter; rostral sectors; area TPO

Chapter.  693 words.  Illustrated.

Subjects: Neuroscience

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