Abstract
Neural efficiency among concussed and uninjured adolescents during an N-back task: a preliminary functional near-infrared spectroscopy study
Injury Prevention, v 28(Issue Suppl 1), 083
01 Mar 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Statement of Purpose Concussed adolescents frequently experience neurocognitive deficits even after symptom resolution. Measurement of cognitive deficits can be obtained using functional near-infrared spectroscopy (fNIRS), a portable, non-invasive imaging technology that measures prefrontal cortical (PFC) activity. The goal of this exploratory study was to quantify differences in neural efficiency, a measure that combines PFC activity and behavioral performance, among concussed and uninjured adolescents during an N-back task, a standard assessment of working memory.
Methods/Approach Concussed and uninjured adolescents completed an N-back task which requires participants to react when the current stimulus is the same as the n-th letter before the stimulus letter. There were four trials each of 0-, 1-, and 2-back conditions. Reaction times for each condition were captured, with increased reaction time indicating worse performance. Participants wore a continuous-wave fNIRS device positioned over the forehead to record PFC activity. Neural efficiency metrics were based on normalized reaction time and normalized PFC activity across participants. Linear mixed-effects models were used to examine the fixed effects of task condition (0-, 1-, or 2-back), injury status, and their interaction and random effect of subject on neural efficiency.
Results Ten concussed adolescents (8 female, age(mean±sd):17.6±0.7 years, days since injury(mean±sd):19.2±9.4), and 16 uninjured controls (8 female, age(mean±sd):17.9±0.6 years) completed the N-back task. Task condition and the interaction of injury status and task condition were statistically significant. Concussed adolescents displayed significantly worse neural efficiency than uninjured controls only during the 2-back condition.
Conclusion The association of injury status with decreased neural efficiency was limited to the most difficult condition (2-back), indicating that concussed adolescents were able to meet the task demands of the simpler conditions efficiently, but not the complex 2-back condition.
Significance These findings support further study of more complex assessments of cognitive function post-concussion in adolescents.
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Details
- Title
- Neural efficiency among concussed and uninjured adolescents during an N-back task: a preliminary functional near-infrared spectroscopy study
- Creators
- Divya Jain - Children's Hospital of PhiladelphiaCatherine McDonald - University of PennsylvaniaHasan Ayaz - Drexel UniversityLei Wang - Drexel UniversityChristina Master - Children's Hospital of PhiladelphiaKristy Arbogast - Children's Hospital of Philadelphia
- Publication Details
- Injury Prevention, v 28(Issue Suppl 1), 083
- Conference
- SAVIR 2022 Conference (Washington, District of Columbia, United States, 30 Mar 2022–01 Apr 2022)
- Publisher
- British Medical Journal (BMJ)
- Resource Type
- Abstract
- Academic Unit
- Information Science; Drexel Solutions Institute; College of Arts and Sciences; School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000842517800074
- Other Identifier
- 991020106638504721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Public, Environmental & Occupational Health