Frontal aslant tract projections to the inferior frontal gyrus

• Autorzy: Szmuda T. , Rogowska M. , Sloniewski P. , Abuhaimed A. , Szmuda M. , Springer J. , Sabisz A. , Dzierzanowski J. , Starzynska A. , Przewozny T.
• Języki publikacji: EN

Abstrakty

EN

Background: Frontal aslant tract (FAT) is a white matter bundle connecting the pre-supplementary motor area (pre-SMA) and the supplementary motor area (SMA) with the inferior frontal gyrus (IFG). The purpose of the present study was to evaluate the anatomical variability of FAT. Materials and methods: Total number of fibres and the lateralisation index (LI) were calculated. We attempted to find factors contributing to the diversity of FAT regarding IFG terminations to the pars opercularis (IFG-Op) and to the pars triangularis (IFG-Tr). Magnetic resonance imaging of adult patients with diffusion tensor imaging (DTI) with total number of 98 hemispheres composed a cohort. V-shaped operculum was the most common (60.5%). Results: Total number of FAT fibres had widespread and unimodal distribution (6 to 1765; median: 160). Left lateralisation was noted in 64.3% of cases and was positively correlated with total number of FAT fibres and the bundle projecting to IFG-Op (p < 0.01). LI correlated with total number of FAT fibres (r = 0.43, p < 0.01). FAT projected predominantly to IFG-Op (88.9%; 88 of 99). Only in 3 (3.1%) cases more fibres terminated in IFG-Tr than in IFG-Op. Total number of FAT fibres and number of fibres terminating at IFG-Op did not correlate with the ratio of fibre numbers: FAT/IFG-Op, FAT/IFG-Tr and IFG-Op/IFG-Tr (p > 0.05). The greater total number of fibres to IFG-Tr was, the higher were the ratios of IFG-Tr/ /FAT (r = 0.57, p < 0.01) and IFG-Tr/IFG-Op (r = 0.32, p = 0.04). Conclusions: Among the IFG, the major termination of FAT is IFG-Op. Whereas the IFG-Tr projection seems to be related to the expansion of the entire FAT bundle regardless of side, domination and handedness. Nevertheless, FAT features a significant anatomical variability which cannot be explained in terms of DTI findings. (Folia Morphol 2017; 76, 4: 574–581)

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2017
• Tom: 76
• Numer: 4
• Opis fizyczny: p.574-581,fig.,ref.

Twórcy

autor

Szmuda T.

• Neurosurgery Department, Medical University of Gdansk, Gdansk, Poland

autor

Rogowska M.

• Students Scientific Association, Neurosurgery Department, Medical University of Gdansk, Gdansk, Poland

autor

Sloniewski P.

• Neurosurgery Department, Medical University of Gdansk, Gdansk, Poland

autor

Abuhaimed A.

• Students Scientific Association, Neurosurgery Department, Medical University of Gdansk, Gdansk, Poland

autor

Szmuda M.

• Neurology Department, Medical University of Gdansk, Gdansk, Poland

autor

Springer J.

• Department of Preventive Medicine and Education, Medical University of Gdansk, Gdansk, Poland

autor

Sabisz A.

• Department of Radiology, Medical University of Gdansk, Gdansk, Poland

autor

Dzierzanowski J.

• Neurosurgery Department, Medical University of Gdansk, Gdansk, Poland

autor

Starzynska A.

• Department of Orofacial and Dental Surgery, Medical University of Gdansk, Gdansk, Poland

autor

Przewozny T.

• Department of Otolaryngology, Medical University of Gdansk, Gdansk, Poland

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Identyfikatory

DOI

10.5603/FM.a2017.0039