scholarly journals The Superior Frontal Longitudinal Tract: Connection between the Dorsal Premotor and the Dorsolateral Prefrontal Cortices

2020 ◽  
Author(s):  
Mudathir Bakhit ◽  
Masazumi Fujii ◽  
Ryo Hiruta ◽  
Masayuki Yamada ◽  
Kenichiro Iwami ◽  
...  
Keyword(s):  
Spatial Relationship ◽  
Spatial Location ◽  
Superior Longitudinal Fasciculus ◽  
Point Patterns ◽  
Dorsolateral Prefrontal ◽  
Fiber Dissection ◽  
Structural Connection ◽  
Termination Point ◽  
White Fiber ◽  
Prefrontal Cortices

AbstractThe structural connection between the dorsal premotor (PMd) and the lateral prefrontal cortices (DLPFC) has been revealed, in a few studies, as the frontal longitudinal system (FLS). This study conducted a tractography analysis and a limited, postmortem, white-fiber dissection to investigate the superior FLS tract (SFLT) and analyze both its symmetry and termination point patterns. An analysis of spatial location, termination points, laterality, and correlation with the subjects’ gender or handedness was performed. SFLT was constructed in 100% of right and 88% of left hemispheres. The tracts exhibited variable patterns in different subjects in their posterior terminations. Additionally, the SFLT was found to possess a complex spatial relationship with the adjacent bundles. The SFLT was revealed successfully in two right hemispheres, where the posterior terminations were found to originate in the PMd, and its posterior terminations being totally separate from the superior longitudinal fasciculus.

scholarly journals The superior frontal longitudinal tract: a connection between the dorsal premotor and the dorsolateral prefrontal cortices

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mudathir Bakhit ◽  
Masazumi Fujii ◽  
Ryo Hiruta ◽  
Masayuki Yamada ◽  
Kenichiro Iwami ◽  
...  
Keyword(s):  
Premotor Cortex ◽  
Spatial Relationship ◽  
Spatial Location ◽  
Superior Longitudinal Fasciculus ◽  
Point Patterns ◽  
Superior Part ◽  
Diffusion Weighted Images ◽  
Dorsolateral Prefrontal ◽  
Structural Connection ◽  
Termination Point

Abstract A few studies have identified the structural connection between the premotor area and the lateral prefrontal cortex (DLPFC) as the frontal longitudinal system (FLS). This study investigated the existence of a direct segment (none U-fibre) of the superior part of the FLS (sFLS), which connects the dorsal premotor cortex (PMd) and DLPFC and analysed its asymmetry and termination point patterns. A dataset of diffusion-weighted images from 48 subjects was used for generalised q-sampling imaging tractography. Additionally, a white-fibre dissection was conducted in two right hemispheres. An analysis of spatial location, termination points, laterality, and correlation with the subjects’ gender or handedness was performed. The sFLS was found to have a deeper longitudinal bundle directly connecting the PMd and DLPFC. The bundle is referred to hereafter as the superior frontal longitudinal tract (SFLT). The SFLT was reconstructed in 100% of right and 88% of left hemispheres. It exhibited variable patterns in different subjects in their posterior terminations. In addition, it was found to possess a complicated spatial relationship with the adjacent bundles. The SFLT was revealed successfully in two cadaveric right hemispheres, where the posterior terminations were found to originate in the PMd independent of the superior longitudinal fasciculus.

Are cognitive representations of friends' request refusals implemented in the orbitofrontal and dorsolateral prefrontal cortices? A cognitive neuroscience approach to ‘theory of mind’ in relationships

2006 ◽  
Vol 23 (2) ◽  
pp. 249-265 ◽  
Author(s):  
Alan D. Heisel ◽  
Michael J. Beatty
Keyword(s):  
Theory Of Mind ◽  
Brain Imaging ◽  
Social Relationships ◽  
Cognitive Neuroscience ◽  
Process Model ◽  
Critical Role ◽  
Brain Wave ◽  
Cognitive Representations ◽  
Dorsolateral Prefrontal ◽  
Prefrontal Cortices

Formulating cognitive representations of others' mental states when interpreting behavior (i.e., ‘theory of mind’) rather than merely focusing on the behavior is considered a distinctly human trait which both interpersonal scholars and cognitive neuroscientists agree plays a critical role in the development and maintenance of social relationships. Although brain-imaging studies have led to huge advances in the understanding of memory and language, theories of social relationships remain relatively uninformed by cognitive neuroscience. In the present study, hypotheses regarding the implementation of theory of mind in a relationship context are (a) derived from extant theory and research, and (b) tested via brain-imaging technology. Specifically, spectrum analyses were conducted using brain wave recordings collected by an electroencephalograph (EEG) monitoring oscillations in the gamma range for the orbitofrontal and dorsolateral prefrontal cortices while participants attempted to construct cognitive representations regarding a friend's request refusal. Results indicated statistically greater electrical activity in both cortical regions for participants engaged in the task than for participants in the control condition. The implications of the findings for building a fully elaborated sequential process model of cognitive representations in interpersonal contexts, among other theoretical endeavors, are discussed.

scholarly journals Differentiating a Network of Executive Attention: Loreta Neurofeedback in Anterior Cingulate and Dorsolateral Prefrontal Cortices

2009 ◽  
Vol 119 (3) ◽  
pp. 404-441 ◽  
Author(s):  
Rex Cannon ◽  
Marco Congedo ◽  
Joel Lubar ◽  
Teresa Hutchens
Keyword(s):  
Anterior Cingulate ◽  
Executive Attention ◽  
Dorsolateral Prefrontal ◽  
Prefrontal Cortices

Association of Dopamine Transporter Loss in the Orbitofrontal and Dorsolateral Prefrontal Cortices With Methamphetamine-Related Psychiatric Symptoms

2003 ◽  
Vol 160 (9) ◽  
pp. 1699-1701 ◽  
Author(s):  
Yoshimoto Sekine ◽  
Yoshio Minabe ◽  
Yasuomi Ouchi ◽  
Nori Takei ◽  
Masaomi Iyo ◽  
...  
Keyword(s):  
Dopamine Transporter ◽  
Psychiatric Symptoms ◽  
Dorsolateral Prefrontal ◽  
Prefrontal Cortices

scholarly journals White fiber dissection of brain; the internal capsule: a cadaveric study

2010 ◽  
Author(s):  
Chowdhury Forhad ◽  
Haque Mohammod ◽  
Sarkar Mainul ◽  
Ara Shamim ◽  
Islam Mohammod
Keyword(s):  
Internal Capsule ◽  
Cadaveric Study ◽  
Fiber Dissection ◽  
White Fiber

scholarly journals Are ventrolateral and dorsolateral prefrontal cortices involved in the computerized Corsi block-tapping test execution? An fNIRS study

2018 ◽  
Vol 5 (01) ◽  
pp. 1 ◽  
Author(s):  
Stefania Lancia ◽  
Vincenza Cofini ◽  
Marika Carrieri ◽  
Marco Ferrari ◽  
Valentina Quaresima
Keyword(s):  
Test Execution ◽  
Dorsolateral Prefrontal ◽  
Prefrontal Cortices

Dorsal component of the superior longitudinal fasciculus revisited: novel insights from a focused fiber dissection study

2020 ◽  
Vol 132 (4) ◽  
pp. 1265-1278 ◽  
Author(s):  
Spyridon Komaitis ◽  
Georgios P. Skandalakis ◽  
Aristotelis V. Kalyvas ◽  
Evangelos Drosos ◽  
Evgenia Lani ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Anterior Cingulate ◽  
Superior Longitudinal Fasciculus ◽  
Anatomical Entity ◽  
Fiber Tract ◽  
Study Results ◽  
Fiber Dissection ◽  
Anatomical Connection ◽  
Anatomical Evidence ◽  
Formalin Fixed

OBJECTIVEThe 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.METHODSFifteen 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 SLF-II and SLF-III.RESULTSThe 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.CONCLUSIONSStudy 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.

scholarly journals Differential Resting-State Connectivity Patterns of the Right Anterior and Posterior Dorsolateral Prefrontal Cortices (DLPFC) in Schizophrenia

2018 ◽  
Vol 9 ◽  
Author(s):  
Natalia Chechko ◽  
Edna C. Cieslik ◽  
Veronika I. Müller ◽  
Thomas Nickl-Jockschat ◽  
Birgit Derntl ◽  
...  
Keyword(s):  
Resting State ◽  
Connectivity Patterns ◽  
Dorsolateral Prefrontal ◽  
The Right ◽  
Resting State Connectivity ◽  
Prefrontal Cortices
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