title: Head Impact Measurement Devices.
abstract: BACKGROUND
  Concussive injuries are at the forefront of sports medicine research. Recently, researchers have used a variety of head- and helmet-based impact-monitoring devices to quantify impacts sustained during contact sport participation. This review provides an up-to-date collection of head accelerometer use at the youth, high school, and collegiate levels.
  
  
  METHODS
  PubMed was searched for articles published between 1980 and 2015 using the terms accelerometer and concussion, impact sensor and concussion, head impact telemetry system, head impact telemetry, and linear acceleration and concussion. An additional Google search was performed to capture devices without publications.
  
  
  METHODS
  Clinical review.
  
  
  METHODS
  Level 4.
  
  
  RESULTS
  Twenty-four products track and/or record head impact for clinical or research use. Ten of these head impact devices have publications supporting their utility.
  
  
  CONCLUSIONS
  Head impact measuring devices can describe athlete exposure in terms of magnitude and/or frequency, highlighting their utility within a multimodal approach for concussion assessment and diagnosis.
authors.affiliation: School of Kinesiology, University of Michigan, Ann Arbor, Michigan.|NeuroTrauma Research Laboratory, University of Michigan, Ann Arbor, Michigan.
authors.forename: Richelle M
authors.initials: RM
authors.lastname: Williams
authors.affiliation: NeuroTrauma Research Laboratory, University of Michigan, Ann Arbor, Michigan.|School of Public Health, University of Michigan, Ann Arbor, Michigan.
authors.forename: Margaret
authors.initials: M
authors.lastname: Dowling
authors.affiliation: School of Kinesiology, University of Michigan, Ann Arbor, Michigan.|NeuroTrauma Research Laboratory, University of Michigan, Ann Arbor, Michigan.
authors.forename: Kathryn L
authors.initials: KL
authors.lastname: O'Connor
mesh_terms: D061725:Accelerometry; D001265:Athletic Injuries / Q000175:diagnosis* / Q000503:physiopathology; D001696:Biomechanical Phenomena; D001924:Brain Concussion / Q000175:diagnosis* / Q000503:physiopathology; D006257:Head / Q000503:physiopathology; D006260:Head Protective Devices; D006801:Humans
keywords: accelerometers; concussion; head impacts; review; subconcussive