Τίτλος:
Dorsal component of the superior longitudinal fasciculus revisited: Novel insights from a focused fiber dissection study
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Objective: The aim of this study was to investigate the anatomical consistency, morphology, axonal connectivity, and correlative topography of the dorsal component of the superior longitudinal fasciculus (SLF-I) since the current literature is limited and ambiguous. Methods: Fifteen normal, adult, formalin-fixed cerebral hemispheres were studied through a medial to lateral fiber microdissection technique. In 5 specimens, the authors performed stepwise focused dissections of the lateral cerebral aspect to delineate the correlative anatomy between the SLF-I and the other two SLF subcomponents, namely the SLFII and SLF-III. Results: The SLF-I was readily identified as a distinct fiber tract running within the cingulate or paracingulate gyrus and connecting the anterior cingulate cortex, the medial aspect of the superior frontal gyrus, the pre-supplementary motor area (pre-SMA), the SMA proper, the paracentral lobule, and the precuneus. With regard to the morphology of the SLF-I, two discrete segments were consistently recorded: an anterior and a posterior segment. A clear cleavage plane could be developed between the SLF-I and the cingulum, thus proving their structural integrity. Interestingly, no anatomical connection was revealed between the SLF-I and the SLF-II/SLF-III complex. Conclusions: Study results provide novel and robust anatomical evidence on the topography, morphology, and subcortical architecture of the SLF-I. This fiber tract was consistently recorded as a distinct anatomical entity of the medial cerebral aspect, participating in the axonal connectivity of high-order paralimbic areas. © AANS 2020, except where prohibited by US copyright law.
Συγγραφείς:
Komaitis, S.
Skandalakis, G.P.
Kalyvas, A.V.
Drosos, E.
Lani, E.
Emelifeonwu, J.
Liakos, F.
Piagkou, M.
Kalamatianos, T.
Stranjalis, G.
Koutsarnakis, C.
Περιοδικό:
EGYPTIAN JOURNAL OF NEUROSURGERY
Εκδότης:
American Association of Neurological Surgeons
Λέξεις-κλειδιά:
adult; anterior cingulate; Article; cingulate gyrus; cingulum (brain); hemisphere; human; human tissue; left hemisphere; microdissection; parieto-occipital sulcus; precuneus; priority journal; right hemisphere; superior frontal gyrus; superior longitudinal fasciculus; supplementary motor area; topography
DOI:
10.3171/2018.11.JNS182908
