Task-related attentional processes are distinctly modulated by respiration and RR interval variability

Area of Science:

• Cognitive Neuroscience
• Cardiorespiratory Psychophysiology

Background:

• Attentional processing and reaction times (RTs) are influenced by physiological states.
• The interplay between breathing, cardiac activity, and cognitive function, particularly attentional processing, is not fully understood.
• Investigating the cardiorespiratory system's role in modulating performance on cognitive tasks is crucial.

Purpose of the Study:

• To determine the specific involvement of respiration and RR interval (RRI) variability in successful short-term memory task performance.
• To elucidate the relationship between respiratory phase, RRI dynamics, and reaction time modulation.

Main Methods:

• Thirty-six healthy participants completed a short-term memory task.
• Reaction times (RTs) for correct responses were analyzed in relation to respiratory events (inspiratory onset) and RR interval (RRI) velocity.
• Multilevel modeling was employed to analyze the temporal relationships between physiological measures and RT.

Main Results:

• Reaction times (RTs) increased significantly during the exhalation-to-inhalation transition (inspiratory onset).
• RTs also increased when RR interval (RRI) velocity accelerated during the memory retrieval phase.
• Multilevel analysis indicated a temporal mismatch between inspiratory onset and increased RRI velocity, suggesting independent mechanisms affecting RT.

Conclusions:

• Both respiratory phase and RR interval (RRI) variability independently influence attentional processing and task performance.
• The findings suggest distinct physiological mechanisms related to breathing and cardiac activity modulate cognitive performance.
• This research provides insights into the functional differentiation of cardiorespiratory influences on attention and performance.