Tomas Ossandon
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Explore the profile of Tomas Ossandon including associated specialties, affiliations and a list of published articles.
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Articles
32
Citations
815
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Recent Articles
1.
Medel V, Irani M, Crossley N, Ossandon T, Boncompte G
Sci Rep
. 2023 Dec;
13(1):21700.
PMID: 38065976
Characterization of brain states is essential for understanding its functioning in the absence of external stimuli. Brain states differ on their balance between excitation and inhibition, and on the diversity...
2.
Domic-Siede M, Irani M, Valdes J, Rodriguez M, Follet B, Perrone-Bertolotti M, et al.
J Vis Exp
. 2023 Mar;
(193).
PMID: 36939245
The planning process, characterized by the capability to formulate an organized plan to reach a goal, is essential for human goal-directed behavior. Since planning is compromised in several neuropsychiatric disorders,...
3.
Ramirez-Mahaluf J, Tepper A, Alliende L, Mena C, Castaneda C, Iruretagoyena B, et al.
Schizophr Bull
. 2022 Dec;
49(3):706-716.
PMID: 36472382
Background And Hypothesis: Abnormal functional connectivity between brain regions is a consistent finding in schizophrenia, including functional magnetic resonance imaging (fMRI) studies. Recent studies have highlighted that connectivity changes in...
4.
Wainstein G, Rojas-Libano D, Medel V, Alnaes D, Kolskar K, Endestad T, et al.
Netw Neurosci
. 2022 Jan;
5(4):890-910.
PMID: 35024535
Previous research has shown that the autonomic nervous system provides essential constraints over ongoing cognitive function. However, there is currently a relative lack of direct empirical evidence for how this...
5.
Boncompte G, Medel V, Cortinez L, Ossandon T
Br J Anaesth
. 2021 Jun;
127(2):254-263.
PMID: 34099242
Background: Brain activity complexity is a promising correlate of states of consciousness. Previous studies have shown higher complexity for awake compared with deep anaesthesia states. However, little attention has been...
6.
Bhutada A, Sepulveda P, Torres R, Ossandon T, Ruiz S, Sitaram R
Front Neurosci
. 2021 Jan;
14:558981.
PMID: 33414699
Electroencephalography (EEG) source reconstruction estimates spatial information from the brain's electrical activity acquired using EEG. This method requires accurate identification of the EEG electrodes in a three-dimensional (3D) space and...
7.
Domic-Siede M, Irani M, Valdes J, Perrone-Bertolotti M, Ossandon T
Neuroimage
. 2020 Nov;
226:117557.
PMID: 33189934
Cognitive planning, the ability to develop a sequenced plan to achieve a goal, plays a crucial role in human goal-directed behavior. However, the specific role of frontal structures in planning...
8.
Crossley N, Zugman A, Reyes-Madrigal F, Czepielewski L, Castro M, Diaz-Zuluaga A, et al.
Br J Psychiatry
. 2020 Aug;
218(2):112-118.
PMID: 32807243
Background: Social and environmental factors such as poverty or violence modulate the risk and course of schizophrenia. However, how they affect the brain in patients with psychosis remains unclear. Aims:...
9.
Ramirez-Mahaluf J, Medel V, Tepper A, Alliende L, Sato J, Ossandon T, et al.
Neuroimage
. 2020 Jun;
219:117027.
PMID: 32522663
Resting-state functional MRI activity is organized as a complex network. However, this coordinated brain activity changes with time, raising questions about its evolving temporal arrangement. Does the brain visit different...
10.
McPherson M, Dolan S, Durango A, Ossandon T, Valdes J, Undurraga E, et al.
Nat Commun
. 2020 Jun;
11(1):2786.
PMID: 32493923
Music perception is plausibly constrained by universal perceptual mechanisms adapted to natural sounds. Such constraints could arise from our dependence on harmonic frequency spectra for segregating concurrent sounds, but evidence...