Analyzing Dual-Task Paradigms to Improve Postconcussion Assessment and Management.

Area of Science:

• Neuroscience
• Rehabilitation Science
• Sports Medicine

Background:

• Dual-task assessments, combining cognitive and motor activities, are used in concussion evaluation.
• Uncertainty exists regarding optimal dual-task combinations for eliciting reliable effects.
• This study investigated dual-task effects in healthy college-aged individuals.

Purpose of the Study:

• To compare the dual-task effects of various motor and cognitive task combinations.
• To identify the most effective dual-task combinations for concussion assessment.

Main Methods:

• Cross-sectional laboratory study with 20 healthy college-aged participants.
• Four motor tasks (gait, tandem gait, single-leg balance, tandem balance) were performed under five cognitive conditions (single task, subtraction, month reversal, spelling backward, visual Stroop).
• Motor outcomes included spatiotemporal gait variables and center of pressure path length; cognitive outcomes included response rate and accuracy. Data analyzed using repeated-measures ANOVA and Tukey t tests.

Main Results:

• Gait velocity, stride length, and tandem gait velocity showed significant cognitive-motor interactions, with dual-tasking slowing movement.
• Single-leg and tandem balance measures did not significantly differ across cognitive conditions.
• Cognitive-motor interactions affected spelling backward accuracy and response rates for spelling backward, month reversal, and visual Stroop.

Conclusions:

• Gait and tandem gait tasks combined with spelling backward or subtraction cognitive tasks demonstrated robust dual-task effects.
• These specific dual-task combinations are recommended for clinical and research applications in concussion assessment.
• The findings provide evidence-based guidance for optimizing dual-task protocols in concussion research and practice.