Continuously tracking fear response could improve mental health treatment

Continuously tracking fear response could improve mental health treatment
If continuously monitored, fear can be used as a tool to improve mental health treatment, reports University of Houston researcher Rose Faghih, who has created a new algorithm for continuously monitoring the fear response using stress sweat and heart rate. Credit: University of Houston

Assistant professor of electrical and computer engineering Rose Faghih is not afraid of fear. If continuously monitored, she sees it as a tool to improve mental health treatment. So, she and doctoral student Dilranjan Wickramasuriya in the University of Houston Computational Medicine Lab (CML), who have previously tracked the fear response through sweat, or skin conductance, have now illustrated that the sympathetic nervous system’s activation level can be tracked continuously.

“We developed a mixed filter algorithm to continuously track a person’s level of activation using and heart rate measurements,” reports Faghih in the journal PLOS One. “This level of sympathetic activation is closely tied to what is known as or sympathetic arousal.”

The sympathetic nervous system controls what is commonly known as the “fight or flight” response, activated when the body is confronted by fear. Sympathetic nerves are a primary part of the response, and their arousal propels a person to action. When the sympathetic nervous system is activated, the heart starts pumping blood faster to send more oxygen to muscles. Then, tiny bursts of sweat released by the body cause a cooling effect.

“Using measurements of the variations in the conductivity of the skin and the rate at which the heart beats, and by developing mathematical models that govern these relationships, CML researchers have illustrated that the sympathetic nervous system’s activation level can be tracked continuously,” reports Faghih.

The ability to track arousal from skin conductance and heart rate together is an important precursor to the development of wearable monitors that could aid in patient care. The algorithm could be embedded in a wearable electronic device to monitor a patient diagnosed with a fear or anxiety disorder.

“Anxiety and trauma-related disorders are often accompanied by a heightened sympathetic tone and these methods could find clinical applications in remote monitoring for therapeutic purposes,” she said.

Brain stimulation for PTSD patients

More information:
Dilranjan S. Wickramasuriya et al, A mixed filter algorithm for sympathetic arousal tracking from skin conductance and heart rate measurements in Pavlovian fear conditioning, PLOS ONE (2020). DOI: 10.1371/journal.pone.0231659

Continuously tracking fear response could improve mental health treatment (2020, May 19)
retrieved 20 May 2020

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