Understanding Concussions in Children

What is a Concussion?

A concussion is a form of brain injury resulting from a blow or jolt to the head, which causes the brain to shift rapidly within the skull. This movement can lead to chemical alterations in the brain or even damage to brain cells. After a concussion, individuals may experience symptoms such as feeling “dazed,” memory loss, headaches, confusion, nausea, or vomiting. Some individuals may also lose consciousness, although this is not a universal occurrence.

Symptoms and Their Onset

Concussion symptoms can manifest immediately following the injury, but they may also develop later. In some cases, children endure persistent symptoms after a concussion. The prevalence of concussions in children is increasing, yet most injuries are mild, and the majority of children typically recover completely within a few weeks. However, approximately 12% of children may experience persistent post-concussive symptoms lasting at least four weeks post-injury, with some continuing to have symptoms after three months. These prolonged symptoms can significantly hinder their ability to resume normal activities and may impact their brain development.

Common Persistent Symptoms

The most frequently reported persistent post-concussive symptoms include headaches, fatigue, sleep disturbances, and attention difficulties.

Research Insights on Concussion Recovery

Study Overview

A team of Australian researchers conducted a study to examine the relationship between different symptom patterns and changes in brain networks. Their findings were published in the *Annals of Clinical and Translational Neurology*. The research involved 110 children who visited the concussion clinic at Alberta Children’s Hospital, Canada, following mild traumatic brain injuries. Detailed data on concussion symptoms were collected at both four weeks and eight to ten weeks post-injury, alongside brain scans to assess gray matter and brain network connections.

Findings on Brain Function and Recovery

The study revealed that in children experiencing persistent concussion symptoms, poor sleep was associated with reductions in gray matter volume and diminished brain connectivity and function. By analyzing brain scan data, researchers were able to predict recovery outcomes with an 86% accuracy rate based on decreases in brain function observed two months post-injury.

Implications for Rehabilitation

Predicting recovery from persistent post-concussive symptoms in children can be challenging. The study suggests that relying solely on symptom monitoring may not suffice in identifying children at risk for poor recovery. Neuroimaging techniques can provide critical insights to enhance recovery predictions.

Dr. Kartik Iyer, the lead author of the study, emphasized the importance of identifying reductions in brain function, stating, “This knowledge can help clinicians ensure a child receives targeted rehabilitation such as cognitive behavior therapy, medication to improve sleep, or safe and new emerging therapies such as non-invasive brain stimulation to potentially reduce symptoms.”

Dr. Iyer’s team, affiliated with the University of Queensland, Australia, is currently testing a child-friendly non-invasive brain stimulation therapy aimed at assisting children dealing with persistent concussion symptoms post-injury.

References

Iyer KK, Zalesky A, Barlow KM, et al. Default mode network anatomy and function is linked to pediatric concussion recovery. Annals of Clinical and Translational Neurology First published 22 November 2019. University of Queensland, Press release 28 Nov 2019. “Concussion recovery not clear cut for children” https://www.eurekalert.org/pub_releases/2019-11/uoq-crn112819.php. Image by 7721622 from Pixabay.