Article
Geriatrics & Gerontology
Cheryl C. H. Yang, Terry B. J. Kuo, Chun-Hsiu Chen, Wei-Yi Li, Chang-Tsen Hung, Jia-Yi Li
Summary: Aging leads to brain function decline and slower motor and behavioural responses. The hippocampal theta rhythm plays a role in cognition and locomotion. This study examines the changes in hippocampal theta oscillations during voluntary wheel running in young adult and middle-aged rats. The results show that older rats have slower theta oscillations compared to young adult rats, indicating age-related decline in brain function.
EXPERIMENTAL GERONTOLOGY
(2023)
Article
Engineering, Biomedical
Wei-Yi Li, Jia-Yi Li, Terry B. J. Kuo, Kuan-Liang Kuo, Tzu-Chun Wang, Cheryl C. H. Yang
Summary: The hippocampus is responsible for generating the theta rhythm (4-12 Hz) in the EEG signals recorded during locomotion. Holo-Hilbert spectral analysis (HHSA) was used to analyze hippocampal EEG signals recorded in rats. The results showed that the signals recorded before and after treadmill running were concentrated in the delta band with amplitude modulation (AM) at 0.5-1 Hz, while the signals during treadmill exercise were concentrated in the theta band with AM at 0.5-4 Hz. These findings suggest that the hippocampal theta signals can provide insights into functional brain connectivity.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2023)
Article
Multidisciplinary Sciences
Ivan Alisson Cavalcante Nunes de Lima, Hindiael Belchior
Summary: Recent studies have found 2-4 Hz oscillations in the hippocampus of rats during stationary locomotion. These oscillations share similarities with theta oscillations, but have different underlying mechanisms. This study observed 4-Hz oscillations during wheel runs, which had a positive correlation with running speed. Inactivation of the medial septum abolished theta oscillations but preserved 4-Hz oscillations, indicating dissociation between the two rhythms in the rat hippocampus.
Article
Multidisciplinary Sciences
Mikkel Elle Lepperod, Ane Charlotte Christensen, Kristian Kinden Lensjo, Alessio Paolo Buccino, Jai Yu, Marianne Fyhn, Torkel Hafting
Summary: The study shows that optogenetic activation of specific cells surrounding grid cells in the medial entorhinal cortex can influence their spatial activity patterns but not their velocity coding. Phase precession of grid cells is abolished, but speed information is still transmitted through rate coding of individual neurons.
Article
Neurosciences
Rebeca Sifuentes-Ortega, Tomas Lenc, Sylvie Nozaradan, Philippe Peigneux
Summary: The extent of high-level perceptual processing during sleep is controversial. A study found that neural processes enhancing meter-related frequencies weaken during sleep, suggesting limited higher-order processing of auditory rhythms during sleep.
Article
Neurosciences
Yixuan Wang, Jian Liu, Yanping Hui, Zhongheng Wu, Ling Wang, Xiang Wu, Yihua Bai, Qiaojun Zhang, Libo Li
Summary: This study found that multiple blocks of iTBS have dose and time-dependent effects on hippocampus-dependent memory in PD, which may be related to changes in hippocampal c-Fos expression and theta rhythm.
FRONTIERS IN NEUROSCIENCE
(2023)
Article
Neurosciences
A. Broncel, R. Bocian, P. Kios-Wojtezak, J. Konopacki
Summary: The study identified the noradrenergic receptors responsible for the production of hippocampal formation type 2 theta rhythm, showing that the selective activation of a1, a2, and 131 receptors inhibits the rhythm. This contrasts with the effects of endogenous NE, indicating the crucial role of these receptors in modulating HPC mechanisms.
Article
Biochemistry & Molecular Biology
Ricardo Kienitz, Michele A. Cox, Kacie Dougherty, Richard C. Saunders, Joscha T. Schmiedt, David A. Leopold, Alexander Maier, Michael C. Schmid
Summary: In experiments with macaque monkeys, it was found that theta and gamma oscillations exist in primary visual cortex and mid-level cortical areas, with implications for reaction times and neural activity. The ongoing presence of theta and gamma oscillations suggests feedforward sensory processing from V1 to V4, while a clear dissociation between the two rhythms in V4 is observed after lesioning V1.
Article
Physiology
Jeffrey M. M. Chalfant, Deborah A. A. Howatt, Victoria B. B. Johnson, Lisa R. R. Tannock, Alan Daugherty, Julie S. S. Pendergast
Summary: Shift work disrupts circadian rhythms and increases the risk of cardiovascular disease. The mechanisms linking shift work and cardiovascular disease are not well understood. This study investigated the effects of changing the light-dark cycle on atherosclerosis in mice and found that chronic LD shifts worsened atherosclerosis in females by increasing atherogenic cholesterol particles.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Sport Sciences
Brock W. Freeman, Scott W. Talpey, Lachlan P. James, David A. Opar, Warren B. Young
Summary: The purpose of this study was to clarify the relationship between various running gaits and maximum speed. The findings suggest that currently used thresholds for high-speed running and sprinting most likely correspond with jogging and striding, underestimating the true demands of high-speed running. Therefore, a higher relative speed could be used to accurately describe high-speed running and sprinting in field sports.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2023)
Article
Multidisciplinary Sciences
Abhilasha Joshi, Eric L. Denovellis, Abhijith Mankili, Yagiz Meneksedag, Thomas J. Davidson, Anna K. Gillespie, Jennifer A. Guidera, Demetris Roumis, Loren M. Frank
Summary: The hippocampus expresses spatial representations and is crucial for navigation, while the details of locomotor processes are primarily computed and represented in subcortical circuits. This study found a coordination between hippocampal spatial representations and the forelimb stepping cycle in freely behaving rats, with precise timing during spatial decisions.
Article
Chemistry, Analytical
Nikita Frolov, Elena Pitsik, Vadim Grubov, Artem Badarin, Vladimir Maksimenko, Alexander Zakharov, Semen Kurkin, Alexander Hramov
Summary: The aim of this study is to investigate whether the sensory-motor integration (SI) function in healthy older adults can be modified through repetitive tasks and whether this modification differs from young individuals. Through the integration of electroencephalography (EEG) and functional connectivity analyses, the study found that elderly adults showed an increase in anterior stimulus-related theta oscillations and enhanced right-lateralized frontotemporal phase-locking during the repetitive SI tasks. On the other hand, young individuals demonstrated a progressive increase in prestimulus occipital theta power. These results suggest that repetitive auditory stimulation can modify sensory processing in the elderly, and older participants may improve perceptual integration rather than attention-driven processing compared to their younger counterparts.
Article
Health Care Sciences & Services
Inga Griskova-Bulanova, Marko Zivanovic, Aleksandras Voicikas, Evaldas Pipinis, Vytautas Jurkuvenas, Jovana Bjekic
Summary: This study examines the link between individual differences in the ability to generate responses at gamma frequencies and inhibitory control. The results indicate that the ability to generate gamma-range activity is related to basic information processing speed, rather than inhibitory control in healthy young subjects.
JOURNAL OF PERSONALIZED MEDICINE
(2023)
Article
Neurosciences
Irene Petrizzo, Giovanni Anobile, Eleonora Chelli, Roberto Arrighi, David Charles Burr
Summary: There is growing evidence that action and perception have an influence on the processing of magnitudes. Physical exercise can increase the perceived duration of visual stimuli, but does not affect numerosity perception. The temporal distortions caused by exercise disappear quickly, suggesting that physiological factors are unlikely to be the underlying cause.
Article
Multidisciplinary Sciences
Magdalena Sabat, Bartosz Haladus, Michal Klincewicz, Grzegorz J. Nalepa
Summary: The perceived duration of an interval depends on various factors, including physiological arousal, attention, valence, and context. Previous research suggested that cues from the environment, such as the movement of the sun, can influence time perception. This study attempted to replicate the effect and found that while the original effect was not replicated, cognitive load, fatigue, and unpleasant symptoms caused by VR did affect the perceived interval duration.
SCIENTIFIC REPORTS
(2022)
Review
Neurosciences
Emilio Kropff, Sung M. Yang, Alejandro F. Schinder
CURRENT OPINION IN NEUROBIOLOGY
(2015)
Article
Multidisciplinary Sciences
Emilio Kropff, James E. Carmichael, May-Britt Moser, Edvard I. Moser
Article
Neurosciences
Silvio G. Temprana, Lucas A. Mongiat, Sung M. Yang, Mariela F. Trinchero, Diego D. Alvarez, Emilio Kropff, Damiana Giacomini, Natalia Beltramone, Guillermo M. Lanuza, Alejandro F. Schinder
Article
Mathematical & Computational Biology
Maria Constantinou, Soledad Gonzalo Cogno, Daniel H. Elijah, Emilio Kropff, John Gigg, Ines Samengo, Marcelo A. Montemurrol
FRONTIERS IN COMPUTATIONAL NEUROSCIENCE
(2016)
Editorial Material
Psychology, Biological
Federico Stella, Bailu Si, Emilio Kropff, Alessandro Treves
BEHAVIORAL AND BRAIN SCIENCES
(2013)
Article
Computer Science, Cybernetics
Bailu Si, Emilio Kropff, Alessandro Treves
BIOLOGICAL CYBERNETICS
(2012)
Article
Physics, Multidisciplinary
Melisa B. Maidana Capitan, Emilio Kropff, Ines Samengo
Article
Neurosciences
Emilio Kropff, Alessandro Treves
Article
Physics, Multidisciplinary
Eleonora Russo, Vijay M. K. Namboodiri, Alessandro Treves, Emilio Kropff
NEW JOURNAL OF PHYSICS
(2008)
Article
Cell Biology
Miguel M. Carvalho, Nouk Tanke, Emilio Kropff, Menno P. Witter, May-Britt Moser, Edvard Moser
Article
Engineering, Environmental
Andrea L. Pineda Rojas, Sandra M. Cordo, Ramiro Saurral, Jose L. Jimenez, Linsey C. Marr, Emilio Kropff
Summary: Studies have shown that humidity has a significant impact on the variation of COVID-19 positive cases, showing a negative-slope linear relationship, with the highest predictive power in winter months.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Correction
Engineering, Environmental
Zhe Peng, Andrea L. Pineda Rojas, Emilio Kropff, William Bahnfleth, Giorgio Buonanno, Stefanie J. Dancer, Jarek Kurnitski, Yuguo Li, Marcel G. L. C. Loomans, Linsey C. Marr, Lidia Morawska, William Nazaroff, Catherine Noakes, Xavier Querol, Chandra Sekhar, Raymond Tellier, Trisha Greenhalgh, Lydia Bourouiba, Atze Boerstra, Julian W. Tang, Shelly L. Miller, Jose L. Jimenez
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Z. Peng, A. L. Pineda Rojas, E. Kropff, W. Bahnfleth, G. Buonanno, S. J. Dancer, J. Kurnitski, Y. Li, M. G. L. C. Loomans, L. C. Marr, L. Morawska, W. Nazaroff, C. Noakes, X. Querol, C. Sekhar, R. Tellier, T. Greenhalgh, L. Bourouiba, A. Boerstra, J. W. Tang, S. L. Miller, J. L. Jimenez
Summary: Some infectious diseases, including COVID-19, can undergo airborne transmission. Two indicators of infection risk are proposed, which combine key factors that control airborne disease transmission indoors. COVID-19 outbreaks show a clear trend consistent with airborne infection and enable recommendations to minimize transmission risk.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Matias Mugnaini, Diana Polania, Yannina Diaz, Marcelo Ezquer, Fernando Ezquer, Robert M. J. Deacon, Patricia Cogram, Emilio Kropff
Summary: Octodon degus serves as a potential model for studying aging and late-onset Alzheimer's disease. The similarities in hippocampal function and behavior between Octodon degus and laboratory rodents provide a framework for investigating hippocampal dysfunction associated with aging and disease in this species.
SCIENTIFIC REPORTS
(2022)
