Cervical Muscle Activation Characteristics and Head Kinematics in Males and Females Following Acoustic Warnings and Impulsive Head Forces

Details

• Personal Author:
  Coats B ; Gomez NG ; Homayounpour M ; Ingram AC ; Merryweather AS
• Description:
  Sex, head and neck posture, and cervical muscle preparation are contributing factors in the severity of head and neck injuries. However, it is unknown how these factors modulate the head kinematics. In this study, twenty-four (16 male and 8 female) participants experienced 50 impulsive forces to their heads with and without an acoustic warning. Female participants demonstrated a 71 ms faster (p = 0.002) muscle activation onset compared to males after warning. The magnitude of muscle activation was not significant between sexes. Females exhibited 21% (p < 0.008) greater peak angular velocity in all force directions and 18% (p < 0.04) greater peak angular acceleration in sagittal plane compared to males. Females exhibited 15% (p = 0.03) greater peak linear acceleration compared to males only in sagittal flexion. Preparation attenuated head kinematics significantly (p < 0.03) in 11 out of 18 investigated head kinematics for both sexes. A warning eliciting a startle response 420 ms prior to the impact resulted in significant attenuation of all measured head kinematics in sagittal extension (p < 0.037). In conclusion, both sex and warning type were significant factors in head kinematics. These data provide insight into the complex relationship of muscle activation and sex, and may help identify innovative strategies to reduce head and neck injury risk in sports. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Mining Occupational Health Safety
• Keywords:
  Acoustics Author Keywords: Co-contraction Directional Acoustic Warning Force Head Injuries Head Kinematics MTBI Muscles Musculoskeletal System Neck Injuries Neck Muscle Posture Startle Statistical Analysis

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• ISSN:
  0090-6964
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 8 ; Utah
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  49
• Issue:
  12
• NIOSHTIC Number:
  nn:20064092
• Citation:
  Ann Biomed Eng 2021 Dec; 49(12):3438-3451
• Contact Point Address:
  Andrew S. Merryweather, Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, USA
• Email:
  a.merryweather@utah.edu
• Federal Fiscal Year:
  2022
• Performing Organization:
  University of Utah
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Annals of Biomedical Engineering
• End Date:
  20280630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:fbf5279a35945a7fc4cefa97e69652337e1403f22602c0e6c2c7d691c2b68d2f45a5d7935401513ce4c15169360d5dfc4e3be9ed95deccb5cc13568231e9d8bd
• Download URL:
  https://stacks.cdc.gov/view/cdc/222614/cdc_222614_DS1.pdf
• File Type:
  [PDF - 1.35 MB ]