Neurosystems: brain rhythms and cognitive processing

Abstract

Neuronal rhythms are ubiquitous features of brain dynamics, and are highly correlated with cognitive processing. However, the relationship between the physiological mechanisms producing these rhythms and the functions associated with the rhythms remains mysterious. This article investigates the contributions of rhythms to basic cognitive computations (such as filtering signals by coherence and/or frequency) and to major cognitive functions (such as attention and multi-modal coordination). We offer support to the premise that the physiology underlying brain rhythms plays an essential role in how these rhythms facilitate some cognitive operations.

Activation of D2 autoreceptors alters cocaine-induced locomotion and slows down local field oscillations in the rat ventral tegmental area

“…This hypothesis is consistent with recent physiological and computational studies which have suggested that a critical parameter ensuring adequate communication between brain areas is coherence between their main rhythms (reviewed in (Cannon et al, 2014). It will be interesting in future multisite recordings to test whether this change in frequency really leads to changes in synchrony with other brain structures.…”

“…Such correlation can be found for the data obtained from animals running on various types of run-ways and with various velocities (Slawinska and Kasicki, 1998). However, analyzing the short locomotor bouts of similar pattern, we still found a significant shift of theta frequency during the locomotor stereotypy provoked by the high quinpirole and quinpirole + cocaine injections (Table 2 and have a consistent phase difference (see (Cannon et al, 2014;Fries, 2005;Varela et al, 2001) for review). called "coherence filtering" (see (Cannon et al, 2014) for review).…”

“…However, analyzing the short locomotor bouts of similar pattern, we still found a significant shift of theta frequency during the locomotor stereotypy provoked by the high quinpirole and quinpirole + cocaine injections (Table 2 and have a consistent phase difference (see (Cannon et al, 2014;Fries, 2005;Varela et al, 2001) for review). called "coherence filtering" (see (Cannon et al, 2014) for review). According to this concept, if area A projects to area B, with area B containing both "principal" (excitatory) neurons and inhibitory interneurons that are reciprocally interconnected, the input from A will be influencing B much more strongly if it is coherent with (has the same main frequency than) the major rhythm of area B.…”

A study of problems encountered in Granger causality analysis from a neuroscience perspective

“…They are thought to constrain and organize neural activity within and between functional networks across a wide range of temporal and spatial scales (14)(15)(16)(17). Oscillations at specific frequencies have been associated with different states of arousal (18), as well as different sensory (5) and cognitive processes (19,20).…”

Components of the Language-Ready Brain

“…In dynomic terms, I will take labeling to be the slowing down of γ to β followed by β-α coupling, involving a basal ganglia-thalamic-cortical loop (see Cannon et al, 2014 for the rhythmogenesis of β in the basal ganglia). This would disinhibit the thalamic medio-dorsal nucleus via the β band.…”