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This research aims to develop a comprehensive definition of acute stress reactions (ASR) in the context of large scale combat operations.

May 14, 2026Military Psychology0 citationsOpen Access

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Defining Acute Stress Reactions to support large scale combat operations

ELEmily G. Lowery-GiontaWalter Reed Army Institute of Research LMLiana M. MatsonWalter Reed Army Institute of Research SMSamuel A. McLeanUniversity of North Carolina at Chapel Hill

Key Points

This research aims to develop a comprehensive definition of acute stress reactions (ASR) in the context of large scale combat operations.
Conducted a systematic review of existing definitions of ASR.
Analyzed ASR symptoms and their effects on functioning and neurocognition.
Explored ASR specifically in relation to large scale combat operations.
Proposed a definition of ASR that identifies distinct symptom domains.
Clarified the timeline of ASR occurrence during large scale combat.
Specified the impact of ASR on individual functioning and cognitive abilities.

Abstract

version of the International Classification of Diseases (ICD) and considered a non-diagnosable stress reaction by the US military. The diversity in the conceptualizations of ASR has made studying and developing solutions for ASR difficult. Incorporating previous conceptualizations and emerging research, a definition of ASR is proposed that identifies ASR symptom domains, clarifies the timeline in which ASR may occur, and specifies impact of ASR on functioning and neurocognition. To our knowledge, this manuscript is the first to (1) systematically review the current definitions of ASR, (2) specifically discuss ASR in a LSCO context, and (3) present a comprehensive definition of ASR.

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Defining Acute Stress Reactions to support large scale combat operations

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