The latest medical research on Brain Injury Medicine

To examine the persistence of visual symptoms in mild traumatic brain injury (MTBI) during the first months after injury. It is important to recognize visual disturbances because they can delay return to normal activities, while they might be simultaneously treated by visual therapy. Here we describe the results from a 1-year follow-up study of visual disturbances after MTBI.

The study group comprised 26 patients from the Brain Injury Clinic of the Helsinki University Hospital. Inclusion criterion was a high score (≥21p) on the Convergence Insufficiency Symptom Survey (CISS) at an appointment with a neurologist within 6 months after injury. The patients underwent baseline vision evaluation at 4 months on average and follow-up at 14 months after injury. The evaluation included tests for visual acuity, near point of convergence, convergence facility, near point of accommodation, accommodative facility, motility, heterophoria, binocular vision, dynamic visual acuity, and fusional vergence width at near and far distances. Further assessments included the Rivermead Post Concussion Questionnaire for posttraumatic symptoms, a visual analog scale for visual fatigue, and the Developmental Eye Movement Test for saccadic eye movements.

Both CISS and Rivermead Post Concussion Questionnaire scores improved significantly from baseline to follow-up. The overall level of visual fatigue according to visual analog scale score was lower at follow-up, but the increase in visual fatigue (comparing fatigue before and after assessment session) was significant both at baseline and follow-up. In visual function assessments, spontaneous recovery from baseline to follow-up could be seen in vergence facility and pursuit eye movement but not in near point of convergence, near fusion, distance fusion, heterophoria, and dynamic visual acuity.

The results point out the importance of evaluation of visual disturbances after MTBI. Early detection of these disturbances may provide an opportunity to provide visual therapy.

Implementation research is essential to accelerating the public health benefits of innovations in health settings. However, the US National Academies of Sciences, Engineering, and Medicine 2022 report identified a lag in published implementation research applied to traumatic brain injury (TBI). Our objectives were to characterize implementation science studies published to date in TBI clinical care and rehabilitation and provide recommendations for future directions.

A scoping review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews. Articles published between 2011 and 2023 were identified (MEDLINE, PubMed, PsychInfo, and Web of Science), and included if the study focused on the TBI population, measured at least one Proctor (2011) implementation outcome and aligned with implementation research designs. Data were charted using an extraction template.

Of the 38 articles, 76% were published between 2018 and 2023. About 37% of articles were in the pre-implementation phase, and 57.9% were in the implementation phase. Over half of articles used a theory, model, or framework to guide the research. Fifteen studies were descriptive, 10 were qualitative, 7 were mixed methods, and 4 were randomized controlled trials. Most studies investigated implementation outcomes regarding national guidelines following TBI or TBI symptom management. Adoption (42.1%) and fidelity (42.1%) were the most commonly studied implementation outcomes, followed by feasibility (18.4%), acceptability (13.2%), and penetration (10.5%). Only 55% of studies used or tested the effectiveness of one or more implementation strategies, with training and education used most commonly, followed by data warehousing techniques.

Future research should prioritize the selection and investigation of implementation strategy effectiveness and mechanisms across contexts of care and use implementation research reporting standards to improve study rigor. Additionally, collaborative efforts between researchers, community partners, individuals with TBI, and their care partners could improve the equitable translation of innovations across service contexts.

Evidence has suggested that cognitive decline may be a risk factor for freezing of gait (FOG) in Parkinson's disease (PD). Complex and challenging exercises have been suggested as potential rehabilitation strategies to decrease FOG severity and improve cognition; however, it is unknown whether improvement in cognition would explain decreased FOG severity following exercise.

In this secondary analysis, we evaluated the effects of the adapted resistance training with instability (ARTI-complex and challenging exercises) compared with traditional motor rehabilitation (TMR-without challenging exercises) on cognitive function in people with FOG of PD. We also verified whether cognitive improvement explains the decrease in FOG previously published.

Participants were randomized to either the experimental group (ARTI, n = 17) or the active control group (TMR, n = 15). Both training groups exercised 3 times a week for 12 weeks (80-90 minute each session). FOG severity (FOG ratio from inertial sensors during a 360° turning-in-place task), frontal lobe function (Frontal Assessment Battery [FAB]), global cognition (Montreal Cognitive Assessment [MoCA]), and attention and psychomotor speed (Digit Symbol Substitution Test [DSST]) were evaluated before and after interventions.

Only the ARTI group improved FAB, MoCA, and DSST scores at posttraining. In addition, ARTI was more effective than TMR in improving FAB scores at posttraining. The changes in FAB scores explained the changes in FOG ratio following ARTI (R2 = .43, P < .01).

This pilot study suggests that ARTI, a complex and challenging training, improves cognition in people with FOG of PD. Improvements in frontal lobe function with ARTI help explain decreased FOG severity.