Evaluating the Effects of Different Cognitive Tasks on Autonomic Nervous System Responses: Implementation of a...

Area of Science:

• Physiology
• Neuroscience
• Psychology

Background:

• A novel, accessible research tool was created to assess autonomic nervous system (ANS) activity under varying cognitive workloads.
• The tool utilizes a computer-based test battery with visual stimuli to simulate cognitive tasks.

Purpose of the Study:

• To evaluate the effectiveness of a new research tool in measuring autonomic nervous system (ANS) responses during cognitive tasks.
• To assess sympathetic and parasympathetic nervous system activity in response to cognitive load.

Main Methods:

• Skin conductance response (SCR) and electrocardiograms (ECG) were recorded in 25 healthy adults.
• Participants engaged in a button-pressing task with visual stimuli, measuring reaction time (RT) and cognitive load.
• Analysis focused on skin conductance levels (SCLs) and heart rate variability (HRV) parameters.

Main Results:

• Increased SCLs and altered HRV parameters were observed during cognitive tasks compared to baseline.
• Reaction times (RTs) significantly increased with higher cognitive load.
• The study confirmed the tool's ability to elicit sympathetic responses and impact cardiac vagal tone.

Conclusions:

• The developed research tool successfully induces cognitive load, significantly altering SCL, RT, and HRV.
• This validates the tool's efficacy in evaluating autonomic nervous system (ANS) responses to cognitive tasks.
• The findings underscore the influence of cognitive load on the brain-heart connection via the ANS.