On the dynamics of Liesegang-type pattern formation in a gaseous system


Liesegang pattern formations are widely spread in nature. In spite of a comparably simple experimental setup under laboratory conditions, a variety of spatio-temporal structures may arise. Presumably because of easier control of the experimental conditions, Liesegang pattern formation was mainly studied in gel systems during more than a century. Here we consider pattern formation in a gas phase, where beautiful but highly complex reaction-diffusion-convection dynamics are uncovered by means of a specific laser technique. A quantitative analysis reveals that two different, apparently independent processes, both highly correlated and synchronized across the extension of the reaction cloud, act on different time scales. Each of them imprints a different structure of salt precipitation at the tube walls.

Artículo Completo / Full paper: https://www.nature.com/articles/srep23402


The Influence of EEG References on the Analysis of Spatio-Temporal Interrelation Patterns


The characterization of the functional network of the brain dynamics has become a prominent tool to illuminate novel aspects of brain functioning. Due to its excellent time resolution, such research is oftentimes based on electroencephalographic recordings (EEG). However, a particular EEG-reference might cause crucial distortions of the spatiotemporal interrelation pattern and may induce spurious correlations as well as diminish genuine interrelations originally present in the dataset. Here we investigate in which manner correlation patterns are affected by a chosen EEG reference. To this end we evaluate the influence of 7 popular reference schemes on artificial recordings derived from well controlled numerical test frameworks. In this respect we are not only interested in the deformation of spatial interrelations, but we test additionally in which way the time evolution of the functional network, estimated via some bi-variate interrelation measures, gets distorted. It turns out that the median reference as well as the global average show the best performance in most situations considered in the present study. However, if a collective brain dynamics is present, where most of the signals get correlated, these schemes may also cause crucial deformations of the functional network, such that the parallel use of different reference schemes seems advisable.

Artículo completo – Complete paper: https://www.frontiersin.org/articles/10.3389/fnins.2019.00941/full

Imagen: https://pixabay.com/photos/eeg-integration-2680957/

Science Art & Cognition Workshop 2018, memorias.

En esta segunda edición del taller Science, Art & Cognition se logró una asistencia constante durante toda la semana. Artistas de diversas disciplinas, psicólogos, biólogos, físicos, neurocientíficos, matemáticos y computólogos entre muchos otros, nos reunimos para intercambiar ideas y encontrar rutas de trabajo interdisciplinar con un mismo fin: conocer.

La participación de los asistentes fue muy activa y la retroalimentación que obtuvo cada uno de los proyectos presentados fue enriquecedora. El evento se llevó a cabo en un ambiente de camaradería en el cual se gestaron amistades y proyectos a futuro.

Desde su inicio, este fue el espíritu del taller. Crear un espacio informal en el que todos tuvieran voz y pudieran compartir su conocimiento y sus dudas con los demás.

Los esperamos en próximas ediciones y agradecemos la motivación y el trabajo realizado por todos los asistentes.



Conferencia “It’s about Time – in the Human Brain: behavioural, neuropsychological and neuroimaging findings” por Manon Grube (Resumen)

En el marco del Taller Science Art & Cognition 2018, la PhD Manon Grube (Center for Music in the Brain, Aarhus Univ. Denmark ) , dará la conferencia titulada “It’s about Time – in the Human Brain: behavioural, neuropsychological and neuroimaging findings” el jueves 27 de septiembre.

—–Para conocer el programa del taller haz click aquí—–

—–Para hacer la aplicación al registro del taller haz click aquí—-



It’s about Time – in the Human Brain: behavioural, neuropsychological and neuroimaging findings

Rhythm and timing are critical to music and speech, and the perception of rhythm and time is a most fascinating field to study to me. My research tackles mechanisms of perceptual timing, phenomenally and neurally, and in terms of their relevance. In my talk I will present an overview on my work on rhythm perception, integrating studies in neurological patients, healthy adults and children. I will first introduce the apparent distinction between beat-based and duration-based timing  (patients, TMS, fMRI). From there, I move on to advocate a tight yoking between the two, by discussing their links to language skill during adolescent development, as well as observations from non-beat based predictive timing. As a finishing note I will come back to beat-based rhythm processing, and present unpublished and on-going work on the neural correlates in the EEG.


Image: https://pixabay.com/en/time-clock-watches-time-of-2798570/

Conferencia Understanding Musical Schemata Across Musical Cultures por Panayotis Mavromatis (Resumen)

En el marco del Taller Science Art & Cognition 2018, el PhD Panayotis Mavromatis (Universidad de Nueva York), dará la conferencia titulada “Understanding Musical Schemata Across Musical Cultures” el viernes 28 de septiembre.

—–Para conocer el programa del taller haz click aquí—–

—–Para hacer la aplicación al registro del taller haz click aquí—-


Understanding Musical Schemata Across Musical Cultures

Musical schemata, or patterns of varied repetition, have recently been shown to play a central role in music composition and improvisation, and are received increasing attention in music theory, historical musicology, ethnomusicology, and music information retrieval. For example, Treitler (1974, 1975), Hucke (1980), and Nowacki (1985, 1986) have studied formulaic structure in medieval plainchant and have related it to questions of oral transmission. Gjerdingen (1988, 2007) has demonstrated the pedagogical and communicative significance of schematic patterns in the galant style of eighteenth-century Europe. Seeger (1966), Shapiro (1972, 1975), and Cowdery (1984, 1990) have studied melodic families in Western folk song, and more recently Volk and collaborators (2012, 2016) have explored similar questions in a computational framework. Richard Widdess (2011) has identified schematic patterns in orally transmitted devotional songs of Nepal. And the present author has developed a computational model of formulaic structure in modern Greek church chant (Mavromatis 2005, 2009). In this talk, I suggest that diverse manifestations of schema-based variability in music can be accommodated within a common formal and computational framework of musical schema theory that draws on general cognitive schema theory (Rumelhart 1980, Schank and Abelson 1977) and on various aspects of previous music studies. Thus, behind the diversity of musical practices and attitudes, one can glean patterns of structure and behavior that could in principle be traced to a common origin, namely properties of memory and learning. The latter, though diverse in their cultural manifestations, nevertheless rely on the common biological underpinning of the human brain with its very specific capabilities and limitations.

Science, Art & Cognition: Transdisciplinary Workshop. 2017.

propuesta 3 corregida TRANSDISC.jpg

The aim of this event is to foster in an informal environment, a vivid discussion between experts and students working at the interface between art and science. Of particular interest are the cognitive processes involved in their research.

Program: https://drive.google.com/file/d/1OWfBbP_9L-b29WoLRE665CiSnhSCmZd0/view

Photo Gallery:


viktor muller.jpg

Viktor Müller: Hyper-Brain Networks and Interpersonal Action Coordination during Music Performance


Anjan Chatterjee: The Neurology of Art


Krasimira Tsaneva-Atanasova: Individual motor signatures and socio-motor biomarkers in schizophrenia

ruben fossion.jpg

Ruben Fossion: Homeostasis from a time-series perspective

alexander bies.jpg

Alexander J. Bies: Examining the relationship between perceived complexity and beauty in natural scenes

cristian huepe2.jpg

Christian Huepe: Music as a complex system: From self-organization to criticality

christian rummel.jpg

Christian Rummel: Linear and Nonlinear Interrelation Networks in Intracranial EEG of Epilepsy Patients

mari corsi.jpg

Mari Corsi: Brain activity during recognition of emotion expressed by musical structure variations

luis mochan3.jpg

Luis Mochan: Light in Motion


Jorge Useche: The psychoacoustics of musical intervals and the emergence of macroscopic quantities in melody


Norberto Grzywacz: A Theory for How the Brain Learns Aesthetic Values


Tom Froese: The cognitive science of art and cognition in Paleolithic caves


Fernando Rosas: Coordination beyond redundancy: towards a wider understanding of scynchronisation in art performances


Shlomo Dubnov: Computer Creativity and Musical Information Dynamics

We also had the opportunity to listen to Gabriela Pérez (“On the relation between music imagery and cochlear mechanics: A combined EEG and otoacoustic emissions study”), Francisco Fernández de Miguel, Pablo Padilla (“Drugs, music and brain activity”) and Rafael Barrio (“Mostly Music”).

On Wednesday, we enjoyed an excursion to the archeological site of Chacaltzingo.

chacaltzingo2.jpg  chacaltzingo1.jpg