School sports season is back in session and football and soccer are underway at virtually every school and college. While these sports help keep children active and develop valuable team-building skills, the coming months will undoubtedly bring an increase in the incidence of concussion and brain injuries among children, adolescents and young adults.
The term concussion is synonymous with mild traumatic brain injury (mTBI). Concussions are quite common. For example, in football alone, an estimated 10% of college and 20% of high school players in the United States sustain brain injuries each season.
A concussion occurs with head injury due to contact that results in acceleration or deceleration forces and may or may not involve a loss of consciousness (LOC). However, LOC (if present) and its duration are critical as it is used to determine the severity of the injury.
Symptoms of Concussion
The symptoms and signs of a concussion may evolve over a number of minutes to hours, so a person who suffers a hard hit may initially appear to be alert and clear of mind immediately after the injury, only to experience decline at a later time. For this reason, it is essential that individuals suspected of having a concussion be carefully observed over the next 12-24 hours following discharge to ensure their condition does not deteriorate. Usually this responsibility falls to family and friends. It is very important that someone recoverying from a concussion not be left alone over the next day or so following injury.
The hallmark acute symptoms of concussion include confusion and amnesia, which manifests as a temporary loss of memory for events immediately prior to and/or following the concussion. These symptoms may be apparent immediately after the head injury or may appear several minutes (or even hours) later.
Athletes and family members need to recognize an alteration in mental status can occur without LOC. In fact, the majority of concussions in sports occur without LOC. Consequently, most concussions often go unrecognized and undiagnosed. This is why many sports programs are implementing policies to recognize and assess possible concussion.
Other signs and symptoms of concussion include headache, dizziness, nausea and vomiting. Additional symptoms which often develop in the hours and days afterward include moodiness, irritability, sensitivity to light and noise and sleep disturbances. One reason that a thorough assessment is so important following suspected concussion is the possibility of Second-Impact Syndrome (SIS). SIS occurs when an individual sustains a second concussion while still symptomatic from an earlier concussion. While rare, this condition is often fatal and makes accurate diagnosis of any concussion all the more important.
Testing and Diagnosis
Patients who are being seen in the emergency department (ED) may have normal neuroimaging (e.g., CT/MRI) results. This is because neuroimaging following concussion/TBI is largely unremarkable, reflecting a functional disturbance in the brain rather than visible structural injury.
The evaluation of an individual with concussion includes mental status testing and a neurologic assessment. Significant warning signs include prolonged unconsciousness, persistent mental status alterations (e.g., prolonged amnesia), or abnormalities on neurologic examination. If these symptoms are present, urgent neuroimaging and neurosurgical consultation may be warranted. One of the most common symptoms reported by patients following concussion is a general slowing of mental processing speed.
While acute symptoms represent one area of concern, medical providers should be alert for any patient who is reporting a history of multiple concussions. Inquiring about any cognitive deficits they are experiencing is important to determine if a more comprehensive neuropsychological evaluation is warranted. Complaints of memory loss, concentration and attention difficulties, and decline in academic performance would likely provide a compelling basis for further evaluation. Mood symptoms are also a common complaint, as concussions can contribute to emotional labiality, depression, irritability and impulsivity.
When a patient’s symptom complaints persist beyond what would be expected following an uncomplicated head injury (e.g., several weeks and months post-injury), medical providers should suspect the possibility of post-concussion syndrome (PCS). PCS typically includes headache, dizziness, neuropsychiatric symptoms and cognitive impairment.
This is an area in which neurocognitive and psychological testing can provide additional diagnostic clarification and inform treatment through appropriate intervention strategies, leading to improved long-term outcomes. In fact, neuropsychological assessment has been considered the “gold standard” in concussion assessment for some time, due in large part to the persistence of cognitive deficits in the absence of focal neurologic dysfunction.
Whether it’s football, baseball, skateboarding, wrestling, or just bike riding, sports and physical exercise can be a great way for young athletes to explore their passions, develop new skills and stay healthy and fit.
At the same time, parents, coaches, activity instructors – and participants themselves! – must always take proper safety precautions to protect the head and help prevent a TBI from occurring.
Always wear the proper protection gear, such as helmets, mouthguards, etc.
Make sure protection gear is properly fitted.
Replace cracked, worn or broken protection gear immediately.
Follow the rules of the game.
Be aware of the danger of head injuries.
Know how to spot the signs and symptoms of a concussion.
Concussion and TBI Awareness
A great deal of interest and increasing attention continues to be given to the effects of concussions. The high-profile suicides of many professional athletes and literature linking contact sports with neurodegenerative conditions such as chronic traumatic encephalopathy (CTE) have raised concern among many. As a result, healthcare providers are likely to encounter increasing numbers of patients and family members who are concerned about the effects of head injuries and what assessment and treatment options are available. Being able to recognize the acute and chronic symptoms of concussion will lead to more favorable outcomes in the future.