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Traumatic Brain Injury l: Introduction

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Retraining Dorsal Visual Pathways Improves Cognitive Skills After a Mild Traumatic Brain Injury.

Teri Lawton¹, John Shelley-Tremblay^2,3, Roland R Lee^4,5

¹Cognitive Neuroscience Research and Remediation, Perception Dynamics Institute, Encinitas, CA 92023, USA.

Journal of Clinical Medicine

|April 12, 2025

Summary

A new intervention, PATH, significantly improved visual working memory in mild traumatic brain injury (mTBI) patients by targeting dorsal visual pathways, outperforming conventional cognitive therapies.

Keywords:

TBI rehabilitation attention improve cognitive skills processing speed visual timing visual working memory

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Area of Science:

Neuroscience
Cognitive Rehabilitation
Traumatic Brain Injury Research

Background:

Mild traumatic brain injury (mTBI) often results in persistent cognitive deficits, particularly visual timing impairments.
These deficits are hypothesized to stem from impaired processing within the dorsal visual pathways.
Currently, effective remediation strategies for mTBI-related cognitive impairments are lacking.

Purpose of the Study:

To evaluate the efficacy of a novel intervention, PATH, in ameliorating visual timing deficits in mTBI patients.
To compare the effectiveness of PATH against two conventional cognitive therapies: Orientation Discrimination (OD) and ReCollect.
To assess the impact of these interventions on visual working memory (VWM) and secondary cognitive functions.

Main Methods:

A study involving 10 mTBI subjects (ages 26-60) compared three interventions: PATH, OD, and ReCollect.
Participants underwent 36 training sessions (30 minutes each) over several weeks.
Neuropsychological tests assessed primary outcome (VWM) and secondary outcomes (processing speed, auditory working memory, selective attention) pre- and post-intervention. MagnetoEncephaloGraphy (MEG) was used as a biomarker.

Main Results:

The PATH intervention group showed an average VWM improvement of 35%, significantly higher than ReCollect (15%) and OD (5%).
Repeated-measures ANOVA confirmed that enhancing dorsal stream function via PATH led to superior VWM improvements compared to other therapies.
MEG recordings corroborated the cognitive improvements observed in the treatment groups.

Conclusions:

The PATH intervention demonstrates significant promise as a novel method for improving cognitive deficits in mTBI patients.
Targeting dorsal visual pathways appears more effective for cognitive remediation in mTBI than conventional approaches.
This preliminary study suggests PATH may offer a more effective therapeutic strategy for mTBI recovery.