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Related Experiment Video

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In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data
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Vestibular Dysfunction after Subconcussive Head Impact.

Sungjae Hwang1, Lei Ma1, Keisuke Kawata1

  • 1Department of Kinesiology, Temple University , Philadelphia, Pennsylvania.

Journal of Neurotrauma
|February 18, 2016
PubMed
Summary
This summary is machine-generated.

Mild head impacts, like those from soccer heading, can temporarily disrupt vestibular function and impair walking stability. These subconcussive effects may go unnoticed with standard clinical tests but impact neurological function.

Keywords:
behavioral assessmentshead traumahuman studiesoutcome measuressensory function

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Area of Science:

  • Neuroscience
  • Sports Medicine
  • Biomechanics

Background:

  • Subconcussive head impacts are increasingly recognized for potential neurological harm.
  • Standard clinical tests may lack sensitivity to detect deficits from mild head trauma.

Purpose of the Study:

  • To investigate the effects of subconcussive soccer heading on vestibular function and walking stability.
  • To assess transient neurological changes using sensitive, innovative measures.

Main Methods:

  • A repeated measures design was used with a heading group (n=10) performing 10 soccer headers at 25 mph.
  • Evaluations included the modified Balance Error Scoring System (mBESS), a walking stability task, and galvanic vestibular stimulation (GVS).
  • Measurements were taken 24 hours before, immediately after, and 24 hours after heading, compared to a control group (n=10).

Main Results:

  • The heading group showed significant changes in trunk angle, leg angle gain, and center of mass gain relative to GVS compared to controls.
  • Increased medial-lateral trunk displacement and velocity during walking were observed immediately after heading.
  • Controls improved mBESS scores over time (learning effect), but the heading group did not.

Conclusions:

  • Mild head impacts from soccer heading induce transient vestibular dysfunction.
  • This vestibular dysfunction deters walking stability during task performance.
  • Subconcussive impacts may cause subtle neurological deficits not detected by standard clinical assessments.