scholarly journals BrainTV: a novel approach for online mapping of human brain functions

2007 ◽  
Vol 40 (4) ◽  
Author(s):  
JEAN-PHILIPPE LACHAUX ◽  
KARIM JERBI ◽  
OLIVIER BERTRAND ◽  
LORELLA MINOTTI ◽  
DOMINIQUE HOFFMANN ◽  
...  
KronoScope ◽  
2013 ◽  
Vol 13 (2) ◽  
pp. 228-239
Author(s):  
Rémy Lestienne

Abstract J.T. Fraser used to emphasize the uniqueness of the human brain in its capacity for apprehending the various dimensions of “nootemporality” (Fraser 1982 and 1987). Indeed, our brain allows us to sense the flow of time, to measure delays, to remember past events or to predict future outcomes. In these achievements, the human brain reveals itself far superior to its animal counterpart. Women and men are the only beings, I believe, who are able to think about what they will do the next day. This is because such a thought implies three intellectual abilities that are proper to mankind: the capacity to take their own thoughts as objects of their thinking, the ability of mental time travels—to the past thanks to their episodic memory or to the future—and the possibility to project very far into the future, as a consequence of their enlarged and complexified forebrain. But there are severe limits to our timing abilities of which we are often unaware. Our sensibility to the passing time, like other of our intellectual abilities, is often competing with other brain functions, because they use at least in part the same neural networks. This is particularly the case regarding attention. The deeper the level of attention required, the looser is our perception of the flow of time. When we pay attention to something, when we fix our attention, then our inner sense of the flux of time freezes. This limitation should not sound too unfamiliar to the reader of J.T. Fraser who wrote in his book Time, Conflict, and Human Values (1999) about “time as a nested hierarchy of unresolvable conflicts.”


Brain ◽  
2019 ◽  
Vol 142 (12) ◽  
pp. 3991-4002 ◽  
Author(s):  
Martijn P van den Heuvel ◽  
Lianne H Scholtens ◽  
Siemon C de Lange ◽  
Rory Pijnenburg ◽  
Wiepke Cahn ◽  
...  

See Vértes and Seidlitz (doi:10.1093/brain/awz353) for a scientific commentary on this article. Is schizophrenia a by-product of human brain evolution? By comparing the human and chimpanzee connectomes, van den Heuvel et al. demonstrate that connections unique to the human brain show greater involvement in schizophrenia pathology. Modifications in service of higher-order brain functions may have rendered the brain more vulnerable to dysfunction.


2021 ◽  
Author(s):  
Salla M Kangas ◽  
Jaakko Teppo ◽  
Maija J Lahtinen ◽  
Anu Suoranta ◽  
Bishwa M Ghimire ◽  
...  

The implantation of deep brain stimulation (DBS) electrodes into the human brain is a neurosurgical treatment for, e.g., movement disorders. We describe a novel approach to collecting brain tissue from DBS surgery-guiding instruments for liquid chromatography-mass spectrometry and RNA sequencing analyses. Proteomics and transcriptomics showed that the approach is useful for obtaining disease-specific expression data. A comparison between our improved and the previous approaches and related datasets was performed.


2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohammad Ali Salehinejad ◽  
Miles Wischnewski ◽  
Elham Ghanavati ◽  
Mohsen Mosayebi-Samani ◽  
Min-Fang Kuo ◽  
...  

AbstractCircadian rhythms have natural relative variations among humans known as chronotype. Chronotype or being a morning or evening person, has a specific physiological, behavioural, and also genetic manifestation. Whether and how chronotype modulates human brain physiology and cognition is, however, not well understood. Here we examine how cortical excitability, neuroplasticity, and cognition are associated with chronotype in early and late chronotype individuals. We monitor motor cortical excitability, brain stimulation-induced neuroplasticity, and examine motor learning and cognitive functions at circadian-preferred and non-preferred times of day in 32 individuals. Motor learning and cognitive performance (working memory, and attention) along with their electrophysiological components are significantly enhanced at the circadian-preferred, compared to the non-preferred time. This outperformance is associated with enhanced cortical excitability (prominent cortical facilitation, diminished cortical inhibition), and long-term potentiation/depression-like plasticity. Our data show convergent findings of how chronotype can modulate human brain functions from basic physiological mechanisms to behaviour and higher-order cognition.


2017 ◽  
pp. 115-186 ◽  
Author(s):  
John C. Ashton ◽  
Megan J. Dowie ◽  
Michelle Glass

2020 ◽  
Vol 49 (D1) ◽  
pp. D1029-D1037
Author(s):  
Liting Song ◽  
Shaojun Pan ◽  
Zichao Zhang ◽  
Longhao Jia ◽  
Wei-Hua Chen ◽  
...  

Abstract The human brain is the most complex organ consisting of billions of neuronal and non-neuronal cells that are organized into distinct anatomical and functional regions. Elucidating the cellular and transcriptome architecture underlying the brain is crucial for understanding brain functions and brain disorders. Thanks to the single-cell RNA sequencing technologies, it is becoming possible to dissect the cellular compositions of the brain. Although great effort has been made to explore the transcriptome architecture of the human brain, a comprehensive database with dynamic cellular compositions and molecular characteristics of the human brain during the lifespan is still not available. Here, we present STAB (a Spatio-Temporal cell Atlas of the human Brain), a database consists of single-cell transcriptomes across multiple brain regions and developmental periods. Right now, STAB contains single-cell gene expression profiling of 42 cell subtypes across 20 brain regions and 11 developmental periods. With STAB, the landscape of cell types and their regional heterogeneity and temporal dynamics across the human brain can be clearly seen, which can help to understand both the development of the normal human brain and the etiology of neuropsychiatric disorders. STAB is available at http://stab.comp-sysbio.org.


1972 ◽  
Vol 120 (559) ◽  
pp. 663-672 ◽  
Author(s):  
D. L. F. Dunleavy ◽  
Vlasta Brezinova ◽  
Ian Oswald ◽  
A. W. Maclean ◽  
M. Tinker

The tricyclic antidepressants are established in therapy but not in mode of action. Effects on mouse or rat brain of single and relatively enormous doses provide the basis for theories. Yet it may be inferred that the clinical use of tricyclic antidepressants relies upon an induction of brain changes on a time-scale of weeks. Studies of tricyclic drug actions upon human brain physiology are as scanty as are easily-measurable human brain functions. Electrophysiological techniques, however, can conveniently be applied during one principal brain-state, namely sleep, when there is a relative freedom from uncontrollable extraneous variables.


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