Lloyd, John
Biomechanics of motorcycle helmet protection Journal Article
In: Journal of Neurotrauma, vol. 33, no. 13, pp. A–84–A–84, 2016, ISBN: 08977151.
Abstract | BibTeX | Tags: accident, Accident victims -- Abstracts, Biomechanics -- Abstracts, Helmet, motorcycle, TBI, Traffic accidents -- Abstracts
@article{Lloyd2016,
title = {Biomechanics of motorcycle helmet protection},
author = {Lloyd, John},
isbn = {08977151},
year = {2016},
date = {2016-01-01},
journal = {Journal of Neurotrauma},
volume = {33},
number = {13},
pages = {A--84--A--84},
abstract = {Motorcycle accident victims account for more than 340,000 fatalities annually, with the Unites States ranking 8th highest worldwide in number of motorcycle accident deaths. Seventy-five percent of all fatal motorcycle accidents involve head and brain injury, with rotational forces acting on the brain the primary cause of mortality. Current motorcycle helmets are reasonably effective at reducing head injuries associated with blunt impact. However, the mechanism of traumatic brain injury is biomechanically very different from that associated with head injury. This biomechanics study was conducted to evaluate the effectiveness of current motorcycle helmets at reducing the risk of traumatic brain injuries, including hemorrhages and concussion. A variety of motorcycle helmet designs, including full-face, threequarter, half-helmets and novelty (non DOT) helmets were evaluated at impact speeds up to 25 mph using a validated test apparatus outfitted with a crash test dummy head and neck. Sensors installed at the center of gravity of the headform and on the helmet enabled high-speed data acquisition of linear and angular head kinematics associated with impact. Variables depicting the impact characteristics and protective properties of the helmet were computed using Matlab- and plot against established biomechanical thresholds for skull fracture, concussion and subdural hematoma. Results of this study indicate that larger, heavier helmets, such as full-face motorcycle helmets, seem to yield a higher risk of traumatic brain injuries, likely due to increased rotational inertia acting on the brain. Findings are also categorized according to the certification standard to which the respective helmets were designed, with interesting discoveries. Most alarming was the limited effectives of current motorcycle helmets in preventing concussion and severe traumatic brain injuries at even modest impact speeds. Considering that motorcyclists purchase protective headgear with the intent of protecting both the head and brain against acute injury it is anticipated that findings from this study will enable endusers to make better-informed purchase decisions. Moreover, it is hoped that knowledge learned from this study will enable the development of a new generation of advanced motorcycle helmets that offer improved protection against both head and brain injuries. [ABSTRACT FROM AUTHOR]},
keywords = {accident, Accident victims -- Abstracts, Biomechanics -- Abstracts, Helmet, motorcycle, TBI, Traffic accidents -- Abstracts},
pubstate = {published},
tppubtype = {article}
}
Lloyd, John
Biomechanics of motorcycle helmet protection Journal Article
In: Journal of Neurotrauma, vol. 33, no. 13, pp. A–84–A–84, 2016, ISBN: 08977151.
@article{Lloyd2016,
title = {Biomechanics of motorcycle helmet protection},
author = {Lloyd, John},
isbn = {08977151},
year = {2016},
date = {2016-01-01},
journal = {Journal of Neurotrauma},
volume = {33},
number = {13},
pages = {A--84--A--84},
abstract = {Motorcycle accident victims account for more than 340,000 fatalities annually, with the Unites States ranking 8th highest worldwide in number of motorcycle accident deaths. Seventy-five percent of all fatal motorcycle accidents involve head and brain injury, with rotational forces acting on the brain the primary cause of mortality. Current motorcycle helmets are reasonably effective at reducing head injuries associated with blunt impact. However, the mechanism of traumatic brain injury is biomechanically very different from that associated with head injury. This biomechanics study was conducted to evaluate the effectiveness of current motorcycle helmets at reducing the risk of traumatic brain injuries, including hemorrhages and concussion. A variety of motorcycle helmet designs, including full-face, threequarter, half-helmets and novelty (non DOT) helmets were evaluated at impact speeds up to 25 mph using a validated test apparatus outfitted with a crash test dummy head and neck. Sensors installed at the center of gravity of the headform and on the helmet enabled high-speed data acquisition of linear and angular head kinematics associated with impact. Variables depicting the impact characteristics and protective properties of the helmet were computed using Matlab- and plot against established biomechanical thresholds for skull fracture, concussion and subdural hematoma. Results of this study indicate that larger, heavier helmets, such as full-face motorcycle helmets, seem to yield a higher risk of traumatic brain injuries, likely due to increased rotational inertia acting on the brain. Findings are also categorized according to the certification standard to which the respective helmets were designed, with interesting discoveries. Most alarming was the limited effectives of current motorcycle helmets in preventing concussion and severe traumatic brain injuries at even modest impact speeds. Considering that motorcyclists purchase protective headgear with the intent of protecting both the head and brain against acute injury it is anticipated that findings from this study will enable endusers to make better-informed purchase decisions. Moreover, it is hoped that knowledge learned from this study will enable the development of a new generation of advanced motorcycle helmets that offer improved protection against both head and brain injuries. [ABSTRACT FROM AUTHOR]},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Lloyd, John
Biomechanics of motorcycle helmet protection Journal Article
In: Journal of Neurotrauma, vol. 33, no. 13, pp. A–84–A–84, 2016, ISBN: 08977151.
Abstract | BibTeX | Tags: accident, Accident victims -- Abstracts, Biomechanics -- Abstracts, Helmet, motorcycle, TBI, Traffic accidents -- Abstracts
@article{Lloyd2016,
title = {Biomechanics of motorcycle helmet protection},
author = {Lloyd, John},
isbn = {08977151},
year = {2016},
date = {2016-01-01},
journal = {Journal of Neurotrauma},
volume = {33},
number = {13},
pages = {A--84--A--84},
abstract = {Motorcycle accident victims account for more than 340,000 fatalities annually, with the Unites States ranking 8th highest worldwide in number of motorcycle accident deaths. Seventy-five percent of all fatal motorcycle accidents involve head and brain injury, with rotational forces acting on the brain the primary cause of mortality. Current motorcycle helmets are reasonably effective at reducing head injuries associated with blunt impact. However, the mechanism of traumatic brain injury is biomechanically very different from that associated with head injury. This biomechanics study was conducted to evaluate the effectiveness of current motorcycle helmets at reducing the risk of traumatic brain injuries, including hemorrhages and concussion. A variety of motorcycle helmet designs, including full-face, threequarter, half-helmets and novelty (non DOT) helmets were evaluated at impact speeds up to 25 mph using a validated test apparatus outfitted with a crash test dummy head and neck. Sensors installed at the center of gravity of the headform and on the helmet enabled high-speed data acquisition of linear and angular head kinematics associated with impact. Variables depicting the impact characteristics and protective properties of the helmet were computed using Matlab- and plot against established biomechanical thresholds for skull fracture, concussion and subdural hematoma. Results of this study indicate that larger, heavier helmets, such as full-face motorcycle helmets, seem to yield a higher risk of traumatic brain injuries, likely due to increased rotational inertia acting on the brain. Findings are also categorized according to the certification standard to which the respective helmets were designed, with interesting discoveries. Most alarming was the limited effectives of current motorcycle helmets in preventing concussion and severe traumatic brain injuries at even modest impact speeds. Considering that motorcyclists purchase protective headgear with the intent of protecting both the head and brain against acute injury it is anticipated that findings from this study will enable endusers to make better-informed purchase decisions. Moreover, it is hoped that knowledge learned from this study will enable the development of a new generation of advanced motorcycle helmets that offer improved protection against both head and brain injuries. [ABSTRACT FROM AUTHOR]},
keywords = {accident, Accident victims -- Abstracts, Biomechanics -- Abstracts, Helmet, motorcycle, TBI, Traffic accidents -- Abstracts},
pubstate = {published},
tppubtype = {article}
}