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Spike sorting based on discrete wavelet transform coefficients

• Juan Carlos Letelier, Priv.-Doz. Dr. P. C. Weber
• Journal of Neuroscience Methods
• 2000

Using the novel mathematical technique known as wavelet analysis, a new method (WSC) is presented to sort spikes according to a decomposition of neural signals in the time-frequency space. The WSC… (More)

A cholinergic gating mechanism controlled by competitive interactions in the optic tectum of the pigeon.

• Gonzalo J Marín, Carlos Salas, Elisa Sentis, Ximena Rojas, Juan Carlos Letelier, Jorge Mpodozis
• The Journal of neuroscience : the official…
• 2007

We describe the operation of a midbrain neural circuit in pigeons that may participate in selecting and attending to one visual stimulus from the myriad displayed in their visual environment. This… (More)

Organizational invariance and metabolic closure: analysis in terms of (M,R) systems.

• Juan Carlos Letelier, Jorge Soto-Andrade, Flavio Guíñez Abarzúa, A. Cornish-Bowden, María Luz Cárdenas
• Journal of theoretical biology
• 2006

This article analyses the work of Robert Rosen on an interpretation of metabolic networks that he called (M,R) systems. His main contribution was an attempt to prove that metabolic closure (or… (More)

Autopoietic and (M,R) systems.

• Juan Carlos Letelier, Gonzalo Marin, Jorge Mpodozis
• Journal of theoretical biology
• 2003

From the many attempts to produce a conceptual framework for the organization of living systems, the notions of (M,R) systems and Autopoiesis stand out for their rigor, their presupposition of the… (More)

Attentional capture? Synchronized feedback signals from the isthmi boost retinal signals to higher visual areas.

• Gonzalo J Marín, Ernesto Durán, +4 authors Juan Carlos Letelier
• The Journal of neuroscience : the official…
• 2012

When a salient object in the visual field captures attention, the neural representation of that object is enhanced at the expense of competing stimuli. How neural activity evoked by a salient… (More)

BRAZIL NUT (BERTHOLLETIA EXCELSA HBK) SEED KERNEL OIL: CHARACTERIZATION AND THERMAL STABILITY

• Vicente Queiroga Neto, Olaf Andreas Bakke, +4 authors Marta Maria da Conceição
• 2009

Brazil nut shows a high nutritive and commercial value, and represents an important export product from the north region of Brazil. The oil extracted from its kernel presents a high coefficient of… (More)

Oscillatory bursts in the optic tectum of birds represent re-entrant signals from the nucleus isthmi pars parvocellularis.

• Gonzalo J Marín, Jorge Mpodozis, Elisa Sentis, Tomás Ossandón, Juan Carlos Letelier
• The Journal of neuroscience : the official…
• 2005

Fast oscillatory bursts (OBs; 500-600 Hz) are the most prominent response to visual stimulation in the optic tectum of birds. To investigate the neural mechanisms generating tectal OBs, we compared… (More)

Topographic arrangement of the rotundo-entopallial projection in the pigeon (Columba livia).

• Felipe Fredes, Sebastián M. Tapia, Juan Carlos Letelier, Gonzalo Marin, Jorge Mpodozis
• The Journal of comparative neurology
• 2010

The tectofugal pathway (retina--optic tectum--nucleus rotundus--entopallium) is a prominent route mediating visual discrimination in diurnal birds. Several lines of evidence have shown that at the… (More)

From L'Homme Machine to metabolic closure: steps towards understanding life.

• Juan Carlos Letelier, María Luz Cárdenas, A. Cornish-Bowden
• Journal of theoretical biology
• 2011

The nature of life has been a topic of interest from the earliest of times, and efforts to explain it in mechanistic terms date at least from the 18th century. However, the impressive development of… (More)

Spatiotemporal profile of synaptic activation produced by the electrical and visual stimulation of retinal inputs to the optic tectum: a current source density analysis in the pigeon (Columba livia).

• Juan Carlos Letelier, Jorge Mpodozis, +4 authors Marcos Velasco
• The European journal of neuroscience
• 2000

The optic tectum of the pigeon is a highly organized, multilayered structure that receives a massive polystratified afference of at least five different populations of retinal ganglion cells and… (More)

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