Wang et al. (2021) — Agitation as a clinical sign of recovery of consciousness

Source

• Frontiers in Surgery 2021 (PMC8097005). URL: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8097005/
• Citation correction notice: The user-supplied 2026-04-19 report cited this as "Lombard et al., Frontiers in Neurology, 2021, PMC8097005." The PMC identifier is correct, but the authors, journal, and year stem are misattributed in the original report. The accurate citation is Wang et al., Frontiers in Surgery. The actual Lombard reference in the agitation-after-brain-injury literature is Lombard & Zafonte 2005 (Am J Phys Med Rehabil), a different paper. This correction is logged in the companion review memo.

Why this paper is in the corpus

This paper supplies the formal clinical argument that behavioral agitation following acute brain injury is not a complication to be treated away but a clinical marker of recovering consciousness — i.e., that reemerging behavioral drive without modulation produces the agitation phenotype. This reframing is central to interpreting Levi's new negatives (elopement, toileting regression, aggression) as features of engagement returning rather than as new injury.

Key findings

• Argues that agitation in disorders-of-consciousness recovery is most parsimoniously understood as a sign of returning arousal and drive in the context of persistent cognitive and executive impairment.
• The asymmetry between restored drive and still-impaired modulation produces the phenomenology of agitation.
• Clinical management should recognize agitation as a recovery stage to be supported and structured, not suppressed.
• Argues for environmental and behavioral management before pharmacologic sedation where possible.

Limitations relevant to Levi

• Discussion-forward paper; not a quantitative study with effect sizes.
• Developed in the context of adult disorders of consciousness; pediatric epileptic-encephalopathy-recovery translation is inferential.
• The PMC-only citation without definitive journal cross-linking in some databases is the likely source of the original report's mis-citation.

Levi-relevant takeaways

• Supports the interpretation that Levi's new negatives are mechanistically coupled to his new positives — the same returning drive that enables fork use and eye contact also enables elopement when executive modulation is still immature.
• Implies the clinical path is environmental structure + time, consistent with Sherer 2020's PTCS framing.
• Reinforces that treating the agitation aggressively (sedating medications) risks suppressing the very recovery process it indicates.

Citation note

Treat this citation as independently re-verified here. The user-supplied report's "Lombard et al., Frontiers in Neurology, 2021, PMC8097005" reference was misattributed; the actual paper at that PMC ID is Wang et al. in Frontiers in Surgery. Pair with Sherer 2020 (PTCS case definition) and Bodien & Giacino 2020 (69% agitation rate at eMCS) for a convergent picture.