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A Neuroscientific Approach to the Examination of Concussions in Student-Athletes

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Published on: December 8, 2014

Clinical versus Functional Reaction Time: Implications for Postconcussion Management.

Landon B Lempke¹, Rachel S Johnson, Julianne D Schmidt

¹UGA Biomechanics Laboratory and UGA Concussion Research Laboratory, Department of Kinesiology, University of Georgia, Athens, GA.

Medicine and Science in Sports and Exercise

|February 14, 2020

Summary

This summary is machine-generated.

Clinical and functional reaction time (RT) assessments did not correlate, indicating current concussion evaluations may not capture sport-specific RT. Dual-task functional RT warrants further study for potential clinical use.

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Area of Science:

Neuroscience
Sports Medicine
Human Movement Science

Background:

Reaction time (RT) is crucial for athletic performance and injury assessment.
Assessing RT in clinical settings, particularly after concussion, requires validated methods.
The relationship between traditional clinical RT tests and functional, sport-specific movements is not fully understood.

Purpose of the Study:

To investigate the association between clinical and functional reaction time (RT) assessments.
To evaluate the impact of cognitive load (single-task vs. dual-task) on RT measurements.
To determine if clinical RT tests reflect functional RT in healthy individuals.

Main Methods:

Forty-one healthy participants completed clinical (drop stick, Stroop) and functional (gait, jump landing, single-leg hop, anticipated/unanticipated cut) RT assessments.
RT was measured under single-task (movement only) and dual-task (movement with cognitive distraction) conditions.
Statistical analyses included Pearson correlations and repeated-measures ANOVA to compare RT across conditions and assessments.

Main Results:

Clinical Stroop RT did not correlate with functional RT assessments.
Dual-task conditions significantly slowed RT across most assessments compared to single-task conditions (P < 0.001).
Functional RT varied significantly, with single-leg hop being the slowest and drop stick the fastest.

Conclusions:

Clinical and functional RT measures are not strongly correlated, suggesting limitations in current concussion RT assessment protocols.
Functional RT assessments, especially under dual-task conditions, may offer greater clinical utility for evaluating sport-relatedRT.
Further research is recommended to explore the clinical value of functional and dual-task RT assessments post-concussion.