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The dorsal longitudinal fasciculus (DLF) (not to be confused with the medial longitudinal fasciculus) is a white matter fiber tract located within the brain stem, specifically in the mesencephalon. The DLF travels through the periaqueductal gray matter.
The descending portion of the DLF originates in the hypothalamus. These fibers then descend through the brian stem periaqueductal gray matter along the base of the fourth ventricle. These fibers continue on into the spinal cord where they synapse with preganglionic autonomic neurons.
- Kiernan JA. (2005). Barr's The Human Nervous System: An Anatomical Viewpoint, 8th Ed., Lippincott Williams & Wilkins. ISBN 0-7817-5154-3.
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