Bilateral agenesis of arcuate fasciculus demonstrated by fiber tractography in congenital bilateral perisylvian syndrome

2015 ◽  
Vol 37 (3) ◽  
pp. 352-355 ◽  
Author(s):  
Ozden Kilinc ◽  
Gazanfer Ekinci ◽  
Ezgi Demirkol ◽  
Kadriye Agan
Keyword(s):  
Arcuate Fasciculus ◽  
Fiber Tractography ◽  
Congenital Bilateral Perisylvian Syndrome

scholarly journals Tractography Alterations in the Arcuate and Uncinate Fasciculi in Post-Stroke Aphasia

2021 ◽  
Vol 11 (1) ◽  
pp. 53
Author(s):  
Sara Kierońska ◽  
Milena Świtońska ◽  
Grzegorz Meder ◽  
Magdalena Piotrowska ◽  
Paweł Sokal
Keyword(s):  
White Matter ◽  
Brain Connectivity ◽  
Three Dimensional ◽  
Cerebral White Matter ◽  
Neural Pathways ◽  
Uncinate Fasciculus ◽  
Arcuate Fasciculus ◽  
Fiber Tractography ◽  
Post Stroke

Fiber tractography based on diffuse tensor imaging (DTI) can reveal three-dimensional white matter connectivity of the human brain. Tractography is a non-invasive method of visualizing cerebral white matter structures in vivo, including neural pathways surrounding the ischemic area. DTI may be useful for elucidating alterations in brain connectivity resulting from neuroplasticity after stroke. We present a case of a male patient who developed significant mixed aphasia following ischemic stroke. The patient had been treated by mechanical thrombectomy followed by an early rehabilitation, in conjunction with transcranial direct current stimulation (tDCS). DTI was used to examine the arcuate fasciculus and uncinate fasciculus upon admission and again at three months post-stroke. Results showed an improvement in the patient’s symptoms of aphasia, which was associated with changes in the volume and numbers of tracts in the uncinate fasciculus and the arcuate fasciculus.

Arcuate Fasciculus and Speech in Congenital Bilateral Perisylvian Syndrome

2011 ◽  
Vol 44 (4) ◽  
pp. 270-274 ◽  
Author(s):  
Anita S.D. Saporta ◽  
Ajay Kumar ◽  
Rajkumar M. Govindan ◽  
Senthil K. Sundaram ◽  
Harry T. Chugani
Keyword(s):  
Arcuate Fasciculus ◽  
Congenital Bilateral Perisylvian Syndrome

scholarly journals Free water modeling of peritumoral edema using multi-fiber tractography: Application to tracking the arcuate fasciculus for neurosurgical planning

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0197056 ◽  
Author(s):  
Shun Gong ◽  
Fan Zhang ◽  
Isaiah Norton ◽  
Walid I. Essayed ◽  
Prashin Unadkat ◽  
...  
Keyword(s):  
Free Water ◽  
Peritumoral Edema ◽  
Arcuate Fasciculus ◽  
Fiber Tractography ◽  
Water Modeling ◽  
Neurosurgical Planning

Reorganization of the Right Arcuate Fasciculus Following Left Arcuate Fasciculus Resection in Children With Intractable Epilepsy

2011 ◽  
Vol 26 (10) ◽  
pp. 1246-1251 ◽  
Author(s):  
Dhruman Goradia ◽  
Harry T. Chugani ◽  
Rajkumar Munian Govindan ◽  
Michael Behen ◽  
Csaba Juhász ◽  
...  
Keyword(s):  
Intractable Epilepsy ◽  
Arcuate Fasciculus ◽  
The Right

scholarly journals Preoperative transcranial magnetic stimulation for picture naming is reliable in mapping segments of the arcuate fasciculus

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Davide Giampiccolo ◽  
Henrietta Howells ◽  
Ina Bährend ◽  
Heike Schneider ◽  
Giovanni Raffa ◽  
...  
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Speech Production ◽  
Picture Naming ◽  
Magnetic Stimulation ◽  
Parietal Lobe ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Diffusion Imaging ◽  
Arcuate Fasciculus ◽  
Preoperative Mapping ◽  
Production Errors

Abstract In preoperative planning for neurosurgery, both anatomical (diffusion imaging tractography) and functional tools (MR-navigated transcranial magnetic stimulation) are increasingly used to identify and preserve eloquent language structures specific to individuals. Using these tools in healthy adults shows that speech production errors occur mainly in perisylvian cortical sites that correspond to subject-specific terminations of the major language pathway, the arcuate fasciculus. It is not clear whether this correspondence remains in oncological patients with altered tissue. We studied a heterogeneous cohort of 30 patients (fourteen male, mean age 44), undergoing a first or second surgery for a left hemisphere brain tumour in a language-eloquent region, to test whether speech production errors induced by preoperative transcranial magnetic stimulation had consistent anatomical correspondence to the arcuate fasciculus. We used navigated repetitive transcranial magnetic stimulation during picture naming and recorded different perisylvian sites where transient interference to speech production occurred. Spherical deconvolution diffusion imaging tractography was performed to map the direct fronto-temporal and indirect (fronto-parietal and parieto-temporal) segments of the arcuate fasciculus in each patient. Speech production errors were reported in all patients when stimulating the frontal lobe, and in over 90% of patients in the parietal lobe. Errors were less frequent in the temporal lobe (54%). In all patients, at least one error site corresponded to a termination of the arcuate fasciculus, particularly in the frontal and parietal lobes, despite distorted anatomy due to a lesion and/or previous resection. Our results indicate that there is strong correspondence between terminations of the arcuate fasciculus and speech errors. This indicates that white matter anatomy may be a robust marker for identifying functionally eloquent cortex, particularly in the frontal and parietal lobe. This knowledge may improve targets for preoperative mapping of language in the neurosurgical setting.

scholarly journals Meyer’s Loop Anatomy Demonstrated Using Diffusion Tensor MR Imaging and Fiber Tractography at 3T

2014 ◽  
Vol 60 (5) ◽  
pp. 215-222 ◽  
Author(s):  
Cristina Goga ◽  
Zeynep Firat ◽  
Klara Brinzaniuc ◽  
Is Florian
Keyword(s):  
Diffusion Tensor Imaging ◽  
Diffusion Tensor ◽  
Region Of Interest ◽  
Fiber Tractography ◽  
Brain Images ◽  
3 Dimensional ◽  
Software Release ◽  
Magnetic Resonance Imaging Mri ◽  
Meyer’S Loop

Abstract Objective: The ultimate anatomy of the Meyer’s loop continues to elude us. Diffusion tensor imaging (DTI) and diffusion tensor tractography (DTT) may be able to demonstrate, in vivo, the anatomy of the complex network of white matter fibers surrounding the Meyer’s loop and the optic radiations. This study aims at exploring the anatomy of the Meyer’s loop by using DTI and fiber tractography. Methods: Ten healthy subjects underwent magnetic resonance imaging (MRI) with DTI at 3 T. Using a region-of-interest (ROI) based diffusion tensor imaging and fiber tracking software (Release 2.6, Achieva, Philips), sequential ROI were placed to reconstruct visual fibers and neighboring projection fibers involved in the formation of Meyer’s loop. The 3-dimensional (3D) reconstructed fibers were visualized by superimposition on 3-planar MRI brain images to enhance their precise anatomical localization and relationship with other anatomical structures. Results: Several projection fiber including the optic radiation, occipitopontine/parietopontine fibers and posterior thalamic peduncle participated in the formation of Meyer’s loop. Two patterns of angulation of the Meyer’s loop were found. Conclusions: DTI with DTT provides a complimentary, in vivo, method to study the details of the anatomy of the Meyer’s loop.

scholarly journals A three-time point longitudinal investigation of the arcuate fasciculus throughout reading acquisition in children developing dyslexia

NeuroImage ◽  
2021 ◽  
pp. 118087
Author(s):  
Stijn Van Der Auwera ◽  
Maaike Vandermosten ◽  
Jan Wouters ◽  
Pol Ghesquière ◽  
Jolijn Vanderauwera
Keyword(s):  
Reading Acquisition ◽  
Arcuate Fasciculus ◽  
Longitudinal Investigation ◽  
Time Point

scholarly journals Arcuate fasciculus architecture is associated with individual differences in pre-attentive detection of unpredicted music changes

NeuroImage ◽  
2021 ◽  
Vol 229 ◽  
pp. 117759
Author(s):  
Lucía Vaquero ◽  
Neus Ramos-Escobar ◽  
David Cucurell ◽  
Clément François ◽  
Vesa Putkinen ◽  
...  
Keyword(s):  
Individual Differences ◽  
Arcuate Fasciculus

Optimization of white matter fiber tractography with diffusional kurtosis imaging

2015 ◽  
Vol 28 (10) ◽  
pp. 1245-1256 ◽  
Author(s):  
G. Russell Glenn ◽  
Joseph A. Helpern ◽  
Ali Tabesh ◽  
Jens H. Jensen
Keyword(s):  
White Matter ◽  
Fiber Tractography ◽  
Diffusional Kurtosis Imaging

Conduction Aphasia and the Arcuate Fasciculus: A Reexamination of the Wernicke–Geschwind Model

1999 ◽  
Vol 70 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J.M. Anderson ◽  
R. Gilmore ◽  
S. Roper ◽  
B. Crosson ◽  
R.M. Bauer ◽  
...  
Keyword(s):  
Arcuate Fasciculus ◽  
Conduction Aphasia
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