Influence of U.S. Army Headgear Parameters on Neck Muscle Loading and Fatigue.

Abstract

This study evaluated the endurance times for the lateral and posterior neck muscles when statically and dynamically loaded by 15 headgear configurations (5 different helmet centers-of-gravity and 3 different helmet weights). Systematic variations of these headgear loading configurations was accomplished via a variable C.G.-weight helmet simulator. Various cardiovascular responses, quantitative electromyographic measurements, and recovery responses were also evaluated. Subjects were tested in an isometric head dynamometer. Results indicate that for the forward-low C.G., the endurance times with 5.0 lb. and 9.0 lb. helmet weights were significantly reduced. (p < or = .05). A pronounced increase in blood pressure, heart rate and rectified E.M.G. amplitude was found for isometric contractions of the neck muscles. The implications of these results to U.S. Army aviator helmet design and helmet-borne avionic devices are discussed. Keywords: Strength-recovery response.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA164982

Entities

People

  • Chandler Allen Phillips
  • Jerrold Scott Petrofsky

Organizations

  • Wright State University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Biomedical Research
  • Body Regions
  • Cardiovascular Physiological Phenomena
  • Center Of Gravity
  • Data Analysis
  • Dynamometers
  • Ear
  • Electromyography
  • Heart Rate
  • Measurement
  • Muscles
  • Musculoskeletal Physiology
  • Plastic Explosives
  • Pressure Measurement
  • Simulators
  • Skeletal Muscle
  • Statistical Analysis

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Human-Computer Interaction (HCI).
  • Trauma Surgery or Emergency Medicine.