Duration of post-traumatic amnesia is uniquely associated with memory functioning in chronic moderate-to-severe traumatic brain injury.
NeuroRehabilitation
; 49(2): 221-233, 2021.
Article
em En
| MEDLINE
| ID: mdl-34397431
ABSTRACT
BACKGROUND:
Disrupted memory circuitry may contribute to post-traumatic amnesia (PTA) after traumatic brain injury (TBI). It is unclear whether duration of PTA (doPTA) uniquely impacts memory functioning in the chronic post-injury stage.OBJECTIVE:
To examine the relationship between doPTA and memory functioning, independent of other cognitive abilities, in chronic moderate-to-severe TBI.METHODS:
Participants were 82 individuals (median chronicityâ=â10.5 years) with available doPTA estimates and neuropsychological data. Composite memory, processing speed (PS), and executive functioning (EF) performance scores, as well as data on subjective memory (SM) beliefs, were extracted. DoPTA-memory associations were evaluated via linear modeling of doPTA with memory performance and clinical memory status (impaired/unimpaired), controlling for PS, EF, and demographic covariates. Interrelationships between doPTA, objective memory functioning, and SM were assessed.RESULTS:
DoPTA was significantly related to memory performance, even after covariate adjustment. Impairment in memory, but not PS or EF, was associated with a history of longer doPTA. SM was associated with memory performance, but unrelated to doPTA.CONCLUSIONS:
Findings suggest a specific association between doPTA-an acute injury phenomenon-and chronic memory deficits after TBI. Prospective studies are needed to understand how underlying mechanisms of PTA shape distinct outcome trajectories, particularly functional abilities related to memory processing.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Lesões Encefálicas Traumáticas
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article