Thus, vpc seems well suited to evaluate sensory events and convert them into a. Where and how in the cerebral cortex do single neurones process more than one sensory modality for more information go to. Learning and recognition of tactile temporal sequences by mice and humans. Although the laboratory was fairly well equipped and investigators were reasonably. Somatosensory parametric working memory in macaque prefrontal cortex.
In this task, monkeys were required to discriminate two vibratory stimuli presented to the fingertip. Earlier this month, mexicos leading university, the national autonomous university of mexico unam, announced that renowned neuroscientist ranulfo romo trujillo would leave his position after being disciplined for an unspecified offense. Neuronal correlates of a perceptual decision in ventral. The stimuli f1 and f2 were separated by a 3 s delay, and the monkeys had to report which stimulus had a. Neural encoding of auditory discrimination in ventral. The potential functions of synchrony, and neural codes based on spike timing in general, have been intensely debated 2,3, but experimental data on the subject 4,5,6 have flowed slowly. Turning sensation into perception 6 november 2005 perceiving a simple touch may depend as much on memory, attention, and expectation as on the stimulus itself, according to new research from. Neuronal correlates of parametric working memory in the prefrontal cortex. Ranulfo romo is professor of neuroscience at the institute of cellular physiology of the national autonomous university of mexico unam. Temporal signals underlying a cognitive process in the. Periodicity and firing rate as candidate neural codes for the frequency of vibrotactile stimuli. Ranulfo romo in 1973, after completing my first course of physiology at the faculty of medicine of the national autonomous university of mexico unam, i decided i wanted to become a physiologist.
Neuronal correlates of a perceptual decision in ventral premotor. Top neuroscientist leaving mexican university science. Ranulfo romo editorial advisory board, progress in neurobiology national autonomous university of mexico department of cognitive neuroscience, mexico city, mexico he received his m. Demixed principal component analysis of neural population data. Conversion of sensory signals into perceptions, memories. Primate cortex can be organized with specialization and hierarchical principles, but presently there is little evidence for how it is organized temporally. In the study of the brain, decoding the mechanisms behind perception and awareness has long posed a difficult problem. Taskdriven intra and interarea communications in primate cerebral cortex adri a tauste campo 1, marina martinezgarcia, ver onica n acher2, ranulfo romo2,3, and gustavo deco1,4 1center for. Timing and neural encoding of somatosensory parametric. Additionally, responses of these neurons and neurons with no coding responses also reflect the timing of the task sequence.
Neural encoding of auditory discrimination in ventral premotor cortex. According to a 4 march press release from unam, romo trujillo voluntarily asked to be separated from his job at its university city campus in mexico city. Conversion of sensory signals into motor commands in primary. Ranulfo romo, adria n herna ndez, and antonio zainos. A hierarchy of intrinsic timescales across primate cortex. I applied and was accepted to work in a laboratory of neurophysiology. Pdf periodicity and firing rate as candidate neural. Neuroscientist ranulfo romo has spent much of his career tackling this problem, investigating how neurons generate the signals that lead to perception of touch stimuli. When trained monkeys discriminate between two sequential vibrotactile stimulus patterns, neurons in the dorsal premotor cortex dpc code current and remembered inputs and the commands expressing the decision report. Elected to the national academy of sciences as a foreign associate in 2005, romo is a professor of neuroscience at the national autonomous university of mexico in mexico city. Neuroscientist ranulfo romo has spent much of his career tackling this problem, investigating how neurons generate the signals that lead to. Conversion of sensory signals into perceptions, memories and decisions. What is the cognitive relevance of these timedependent. Sources close to the case say he had been temporarily.
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