The ansa peduncularis in the human brain: A tractography and fiber dissection study.

Brain Research
Mengjun LiQiang Guo

Abstract

The ansa peduncularis is a composite of white matter fiber bundles closely packed together that sweeps around the cerebral peduncle. The exact components of the ansa peduncularis and their anatomical trajectories are still not established firmly in the literature. The aim of this study was to examine the topographical anatomy of the ansa peduncularis and its subcomponents using the fiber dissection and tractography techniques. Ten formalin-fixed brains were prepared according to Klingler's method and dissected by the fiber dissection technique from the lateral, medial and inferior surfaces. The ansa peduncularis was also traced using high definition fiber tracking (HDFT) from the MRI data of twenty healthy adults and a 1021-subject template from the Human Connectome Project. The ventral amygdalofugal pathway system includes white matter fiber bundles with a topographically close relation as they sweep around the cerebral peduncle and contribute to form the ansa peduncularis: amygdaloseptal fibers connect the amygdala and anterior temporal cortex to the septal region and amygdalohypothalamic fibers project from the amygdala to the hypothalamus. Additionally, from the amygdala and anterior temporal cortex, amygdalothalamic fibers...Continue Reading

Citations

Jun 3, 2021·Biomolecules·Goran ŠimićPatrick R Hof
Sep 19, 2021·Clinical Anatomy : Official Journal of the American Association of Clinical Anatomists & the British Association of Clinical Anatomists·Mengjun LiMingchu Li

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