Dissociating Neural Mechanisms of Temporal Sequencing and Processing Phonemes

Dissociating Neural Mechanisms of Temporal Sequencing and Processing Phonemes

Dissociating Neural Mechanisms of Temporal Sequencing and Processing Phonemes

Using fMRI, we sought to determine whether the posterior, superior portion of Broca's area performs operations on phoneme segments specifically or implements processes general to sequencing discrete units. Twelve healthy volunteers performed two sequence manipulation tasks and one matching task, using strings of syllables and hummed notes. The posterior portion of Broca's area responded specifi...

The Neural Mechanisms of Relational Reasoning: Dissociating Representational Types

The ability to reason about information is an essential human capability. It is less understood from the perspective of neurocognitive processes which can serve to constrain cognitive theories by implications from neuroscientific data. Despite some progress in the last decades, some disagreement about the experimental results and the cognitive processes of reasoning with abstract relations vers...

Dissociating controlled from automatic processing in temporal preparation.

The aim of the present study was to investigate the controlled versus the automatic nature of temporal preparation. If temporal preparation involves controlled rather than automatic processing, it should be reduced by the addition of a concurrent demanding task. This hypothesis was tested by comparing participants' performance in a temporal preparation task that measured two main effects of tem...

Multiple Mechanisms for Temporal Processing

Many models suggest that time perception is mediated by a unitary mechanism. For example, scalar expectancy theory (SET), the dominant model of timing for the past 30 years, suggests that temporal processing is mediated by a centralized clockcounter module in which elapsed time is measured by the summation of pacemaker pulses (Gibbon et al., 1984). A number of alternative, neurally plausible mo...