Toward an Objective Assessment of Fight-or-Flight System Function in Anxiety Disorders: Startle Reflex Modulation in Threat Coping Contexts as a Candidate Neurophysiological Marker of Disrupted Defense System Operation
Background: As a key mechanism of disorder, clinical anxiety changes how a defensive motivation system functions in active threat coping contexts. Building on initial evidence that a lab-based escape/avoid preparation task is sensitive to disruptions in underlying defensive activation, current research moved toward implementation as a clinical assessment by testing if task responding predicts…
In the realm of anxiety disorders, clinical anxiety can alter the functioning of a defensive motivation system when faced with active threat coping scenarios. This study aimed to explore the potential of an escape/avoid task as a clinical assessment tool by examining if task responses could predict symptoms in individuals seeking anxiety treatment.
The escape/avoid task involved the presentation of unpleasant images after 5.5-second cues, which indicated whether the upcoming image could be prevented, terminated after onset, or left uncontrolled. During this process, a startle reflex indicator was used to measure defensive activation during response preparation and threat anticipation.
Researchers classified the 125 participants into different groups based on two specific startle responses. The first group had enhanced startle in a no-control context compared to an avoid context, while the second group exhibited enhanced startle in an escape context relative to the avoid context. Following the classification, anxiety (measured using the State-Trait Anxiety Inventory), depression (measured using the Beck Depression Inventory), and worry (measured using the Penn State Worry Questionnaire) were compared across the different response groups.
The findings revealed that participants with enhanced no-control and escape startle displayed higher levels of anxiety and worry compared to those with enhanced no-control but not escape startle. Additionally, participants with under-enhanced no-control startle showed higher levels of depression than other groups. When the startle-based profiles were compared to groups established by conventional questionnaire cut-off scores, there was a notable convergence ranging from 54-63%.
In conclusion, this research suggests that defensive profiling in escape/avoid contexts shows promise as a prognostic indicator for anxiety disorders. However, there is a need for further improvements to enhance both the predictiveness and reliability of this method.
Written by urgent.news from bioRxiv's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
