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Posts Tagged ‘Concussion

Free Article: The Effects of Multiple Mild Traumatic Brain Injuries

Background: Although research focused on mild traumatic brain injury (mTBI) has proliferated in recent years, few studies have examined the significance of a previous history of mTBI in children.

Objective: To compare the acute injury presentation and neuropsychological recovery in a pediatric sample after mTBI.

Methods: Participants 8 to 16 years of age were divided into 4 groups: no previous injury history, history of 1 mTBI, history of 2 mTBIs, and history of ≥ 3 mTBIs. Participants were evaluated within 3 months of the most recent injury by clinical interview and an abbreviated neuropsychological test battery.

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Written by NEUROSURGERY® Editorial Office

June 30, 2014 at 8:00 AM

Ahead of Print: Elucidating the Severity of Preclinical TBI Models

Background: Concussion remains a symptom-based diagnosis clinically, yet preclinical studies investigating traumatic brain injury, of which concussion is believed to represent a ‘mild’ form, emphasize histological endpoints with functional assessments often minimized or ignored all together. Recently, clinical studies have identified the importance of cognitive and neuropsychiatric symptoms, in addition to somatic complaints, following concussion. How these findings may translate to preclinical studies is unclear at present.

Objective: To address the contrasting endpoints utilized clinically compared to those in preclinical studies and the potential role of functional assessments in a commonly used model of diffuse axonal injury (DAI).

Methods: Animals were subjected to DAI using the impact-acceleration model. Functional and behavioral assessments were conducted over 1 week following DAI prior to completion of histological assessment at 1-week post-DAI.

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Written by NEUROSURGERY® Editorial Office

February 19, 2014 at 8:00 AM

Free Article: The Epidemiology of Outpatient Visits for Minor Head Injury

Background: The Centers for Disease Control and Prevention have called for studies detailing the prevalence and burden of mild traumatic brain injury (mTBI) in the outpatient clinical setting.

Objective: The aim of this study was to describe the prevalence of outpatient visits for minor head injury and compare the number of outpatient visits for minor head injury with the number of emergency department (ED) visits.

Methods: This was a cross-sectional study of outpatient visits for minor head injuries from the National Ambulatory Medical Care Survey (NAMCS) and the National Hospital Ambulatory Medical Care Survey (NHAMCS). We examined outpatient visits for minor head injury between 2005 and 2009 and compared them with visits in the ED for the same diagnoses using simple survey-weighted descriptive statistics.

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Written by NEUROSURGERY® Editorial Office

June 25, 2013 at 2:00 PM

Ahead of Print: Time Between Concussions in Mice

Background: While previous evidence suggests that the cognitive effects of concussions are cumulative, the effect of time interval between repeat concussions is largely unknown.

Objective: To determine the effect of time interval between repeat concussions on the cognitive function of mice.

Methods: We used a weight-drop model of concussion to subject anesthetized mice to 1, 3, 5, or 10 concussions, each a day apart. Additional mice were subjected to 5 concussions at varying time intervals: daily, weekly, and monthly. Morris water maze (MWM) performance was measured 24 hours, 1 month, and 1 year after final injury.

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Written by NEUROSURGERY® Editorial Office

August 23, 2012 at 7:50 AM

Free CME Article: From the Field of Play to the Field of Combat

Traditionally, the medical management of concussion has involved close observation and physical and cognitive rest. Most postconcussive symptoms resolve spontaneously and require only conservative treatment. However, some patients have prolonged recoveries and may benefit from treatment with medications. Some naturally occurring compounds demonstrate multimechanistic neuroprotective properties and may be potential treatment considerations. For the most part, however, current treatments are symptom based for those with persistent postconcussive symptoms. The evidence supporting the various pharmacologic treatments in concussion is equivocal. The choice of which medication to use for a patient depends on the symptom characteristics, and each decision should be made on an individual-case basis. There is a need for well-designed trials investigating the efficacy of various medical therapies.

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Written by NEUROSURGERY® Editorial Office

June 8, 2012 at 7:36 AM

Free Article: Chronic Traumatic Encephalopathy in American Athletes

Background: We define chronic traumatic encephalopathy (CTE) as a progressive neurodegenerative syndrome caused by single, episodic, or repetitive blunt force impacts to the head and transfer of acceleration-deceleration forces to the brain.

Objective: We present emerging histomorphologic phenotypes of CTE that we identified in our cohort of CTE cases with apolipoprotein E genotyping and causes and manners of death.

Methods: Autopsy brain tissue of 14 professional athletes and 3 high school football players was examined after unexpected deaths. Histochemical and immunohistochemical tissue staining was performed with apolipoprotein E genotyping.

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Written by NEUROSURGERY® Editorial Office

May 4, 2012 at 8:06 AM

In the News: Enduring Symptoms after Multiple Concussions

Early Indicators of Enduring Symptoms in High School Athletes With Multiple Previous Concussions” by Schatz et al is referenced in a article titled “The Fragile Teenage Brain,” by Jonah Lehrer.

“The consequences appear to be particularly severe for the adolescent brain. According to a study published last year in Neurosurgery, high school football players who suffered two or more concussions reported mental problems at much higher rates, including headaches, dizziness, and sleeping issues. The scientists describe these symptoms as “neural precursors,” warning signs that something in the head has gone seriously wrong.”

Written by NEUROSURGERY® Editorial Office

January 13, 2012 at 2:07 PM

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