Effects of external helmet accessories on biomechanical measures of head injury risk: An ATD study using the HYBRIDIII headform
Abstract Competitive cycling is a popular activity in North America for which injuries to the head account for the majority of hospitalizations and fatalities. In cycling, use of helmet accessories (e.g. cameras) has become widespread. As a consequence, standards organizations and the popular media...
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| Veröffentlicht in: | Journal of biomechanics 2015-11, Vol.48 (14), p.3816-3824 |
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| creator | Butz, Robert C Knowles, Brooklynn M Newman, James A Dennison, Christopher R |
| description | Abstract Competitive cycling is a popular activity in North America for which injuries to the head account for the majority of hospitalizations and fatalities. In cycling, use of helmet accessories (e.g. cameras) has become widespread. As a consequence, standards organizations and the popular media are discussing the role these accessories could play in altering helmet efficacy and head injury risk. We conducted impacts to a helmeted anthropomorphic headform, with and without camera accessories, at speeds of 4 m/s and 6 m/s, and measured head accelerations, forces on the head-form skull, and used the Simulated Injury Monitor to estimate brain tissue strain. The presence of the camera reduced peak linear head acceleration (51% – 4 m/s impacts, 61% – 6 m/s, p |
| doi_str_mv | 10.1016/j.jbiomech.2015.09.032 |
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In cycling, use of helmet accessories (e.g. cameras) has become widespread. As a consequence, standards organizations and the popular media are discussing the role these accessories could play in altering helmet efficacy and head injury risk. We conducted impacts to a helmeted anthropomorphic headform, with and without camera accessories, at speeds of 4 m/s and 6 m/s, and measured head accelerations, forces on the head-form skull, and used the Simulated Injury Monitor to estimate brain tissue strain. The presence of the camera reduced peak linear head acceleration (51% – 4 m/s impacts, 61% – 6 m/s, p <0.05). Skull fracture risk based on kinematics was always less than 1%. For 4 m/s impacts, peak angular accelerations were lower (47%, p <0.05), as were peak angular velocities (14%) with the velocity effect approaching significance ( p =0.06), with the camera accessory. For 6 m/s impacts, accelerations were on average higher (5%, p >0.05) as were velocities (77%, p <0.05). Skull forces were never greater than 443.2 N, well below forces associated with fracture. Brain tissue strain, the cumulative strain damage measure at 25% (CSDM-25), was lower (56%, p <0.05) in 4 m/s but higher (125%, p >0.05) in 6 m/s impacts with the camera accessory. Based on CSDM-25 for 4 m/s tests, the risk of severe concussion was reduced ( p <0.05) from 25% (no camera) to 7% (camera). For 6 m/s tests, risks were on average increased ( p >0.05) from 18% (no camera) to 58% (camera).</description><identifier>ISSN: 0021-9290</identifier><identifier>EISSN: 1873-2380</identifier><identifier>DOI: 10.1016/j.jbiomech.2015.09.032</identifier><identifier>PMID: 26477409</identifier><language>eng</language><publisher>United States: Elsevier Ltd</publisher><subject>Acceleration ; Accessories ; Bicycling ; Bicycling - injuries ; Biomechanical Phenomena ; Biomechanics ; Brain ; Brain Concussion - prevention & control ; Brain research ; Cameras ; Craniocerebral Trauma - etiology ; Craniocerebral Trauma - prevention & control ; Engineering ; Fractures ; Head ; Head - physiology ; Head injuries ; Head Protective Devices ; Helmet ; Helmets ; Humans ; Impact tests ; Injury prevention ; Kinematics ; Male ; Photography - instrumentation ; Physical Medicine and Rehabilitation ; Polyvinyl chloride ; Risk ; Skull ; Strain ; Traumatic brain injury ; Velocity</subject><ispartof>Journal of biomechanics, 2015-11, Vol.48 (14), p.3816-3824</ispartof><rights>Elsevier Ltd</rights><rights>2015 Elsevier Ltd</rights><rights>Copyright © 2015 Elsevier Ltd. All rights reserved.</rights><rights>Copyright Elsevier Limited 2015</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c517t-333dd329096719ea109d99769988a86ece2be02f074f884d920de3662625f7b03</citedby><cites>FETCH-LOGICAL-c517t-333dd329096719ea109d99769988a86ece2be02f074f884d920de3662625f7b03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0021929015005266$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26477409$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Butz, Robert C</creatorcontrib><creatorcontrib>Knowles, Brooklynn M</creatorcontrib><creatorcontrib>Newman, James A</creatorcontrib><creatorcontrib>Dennison, Christopher R</creatorcontrib><title>Effects of external helmet accessories on biomechanical measures of head injury risk: An ATD study using the HYBRIDIII headform</title><title>Journal of biomechanics</title><addtitle>J Biomech</addtitle><description>Abstract Competitive cycling is a popular activity in North America for which injuries to the head account for the majority of hospitalizations and fatalities. In cycling, use of helmet accessories (e.g. cameras) has become widespread. As a consequence, standards organizations and the popular media are discussing the role these accessories could play in altering helmet efficacy and head injury risk. We conducted impacts to a helmeted anthropomorphic headform, with and without camera accessories, at speeds of 4 m/s and 6 m/s, and measured head accelerations, forces on the head-form skull, and used the Simulated Injury Monitor to estimate brain tissue strain. The presence of the camera reduced peak linear head acceleration (51% – 4 m/s impacts, 61% – 6 m/s, p <0.05). Skull fracture risk based on kinematics was always less than 1%. For 4 m/s impacts, peak angular accelerations were lower (47%, p <0.05), as were peak angular velocities (14%) with the velocity effect approaching significance ( p =0.06), with the camera accessory. For 6 m/s impacts, accelerations were on average higher (5%, p >0.05) as were velocities (77%, p <0.05). Skull forces were never greater than 443.2 N, well below forces associated with fracture. Brain tissue strain, the cumulative strain damage measure at 25% (CSDM-25), was lower (56%, p <0.05) in 4 m/s but higher (125%, p >0.05) in 6 m/s impacts with the camera accessory. Based on CSDM-25 for 4 m/s tests, the risk of severe concussion was reduced ( p <0.05) from 25% (no camera) to 7% (camera). For 6 m/s tests, risks were on average increased ( p >0.05) from 18% (no camera) to 58% (camera).</description><subject>Acceleration</subject><subject>Accessories</subject><subject>Bicycling</subject><subject>Bicycling - injuries</subject><subject>Biomechanical Phenomena</subject><subject>Biomechanics</subject><subject>Brain</subject><subject>Brain Concussion - prevention & control</subject><subject>Brain research</subject><subject>Cameras</subject><subject>Craniocerebral Trauma - etiology</subject><subject>Craniocerebral Trauma - prevention & control</subject><subject>Engineering</subject><subject>Fractures</subject><subject>Head</subject><subject>Head - physiology</subject><subject>Head injuries</subject><subject>Head Protective Devices</subject><subject>Helmet</subject><subject>Helmets</subject><subject>Humans</subject><subject>Impact tests</subject><subject>Injury prevention</subject><subject>Kinematics</subject><subject>Male</subject><subject>Photography - instrumentation</subject><subject>Physical Medicine and Rehabilitation</subject><subject>Polyvinyl chloride</subject><subject>Risk</subject><subject>Skull</subject><subject>Strain</subject><subject>Traumatic brain injury</subject><subject>Velocity</subject><issn>0021-9290</issn><issn>1873-2380</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqNkktv1DAUhSMEotPCX6gssWGT4dpO_GCBGNpCI1VCgrJgZWWcG8ZpHsVOELPqX8eZmYLUTVl54e-cq3vPSZJTCksKVLxpls3aDR3azZIBzZegl8DZk2RBleQp4wqeJgsARlPNNBwlxyE0ACAzqZ8nR0xkUmagF8ndRV2jHQMZaoK_R_R92ZINth2OpLQWQxi8w_jdk8O8snc2Mh2WYfK4E26wrIjrm8lviXfh5i1Z9WR1fU7COFVbMgXX_yDjBsnl9w9fivOiKHaSevDdi-RZXbYBXx7ek-Tbx4vrs8v06vOn4mx1ldqcyjHlnFcVj5toIanGkoKutJZCa6VKJdAiWyOwOi5YK5VVmkGFXAgmWF7LNfCT5PXe99YPPycMo-lcsNi2ZY_DFAxVXPKMxRGPo1IqYCJX4j9QnnNOmeIRffUAbYZpvvaBYhnTMlJiT1k_hOCxNrfedaXfGgpmDt405j54MwdvQJsYfBSeHuyndYfVX9l90hF4vwcwXvmXQ2-CddhbrJyPBTDV4B6f8e6BhW3drg03uMXwbx8TmAHzda7f3D6aA-RMCP4HHzHUbg</recordid><startdate>20151105</startdate><enddate>20151105</enddate><creator>Butz, Robert C</creator><creator>Knowles, Brooklynn M</creator><creator>Newman, James A</creator><creator>Dennison, Christopher R</creator><general>Elsevier Ltd</general><general>Elsevier Limited</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QP</scope><scope>7TB</scope><scope>7TS</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8FD</scope><scope>8FE</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>LK8</scope><scope>M0S</scope><scope>M1P</scope><scope>M2O</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>7X8</scope><scope>7QO</scope><scope>P64</scope></search><sort><creationdate>20151105</creationdate><title>Effects of external helmet accessories on biomechanical measures of head injury risk: An ATD study using the HYBRIDIII headform</title><author>Butz, Robert C ; Knowles, Brooklynn M ; Newman, James A ; Dennison, Christopher R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c517t-333dd329096719ea109d99769988a86ece2be02f074f884d920de3662625f7b03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Acceleration</topic><topic>Accessories</topic><topic>Bicycling</topic><topic>Bicycling - injuries</topic><topic>Biomechanical Phenomena</topic><topic>Biomechanics</topic><topic>Brain</topic><topic>Brain Concussion - prevention & control</topic><topic>Brain research</topic><topic>Cameras</topic><topic>Craniocerebral Trauma - etiology</topic><topic>Craniocerebral Trauma - prevention & control</topic><topic>Engineering</topic><topic>Fractures</topic><topic>Head</topic><topic>Head - physiology</topic><topic>Head injuries</topic><topic>Head Protective Devices</topic><topic>Helmet</topic><topic>Helmets</topic><topic>Humans</topic><topic>Impact tests</topic><topic>Injury prevention</topic><topic>Kinematics</topic><topic>Male</topic><topic>Photography - instrumentation</topic><topic>Physical Medicine and Rehabilitation</topic><topic>Polyvinyl chloride</topic><topic>Risk</topic><topic>Skull</topic><topic>Strain</topic><topic>Traumatic brain injury</topic><topic>Velocity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Butz, Robert C</creatorcontrib><creatorcontrib>Knowles, Brooklynn M</creatorcontrib><creatorcontrib>Newman, James A</creatorcontrib><creatorcontrib>Dennison, Christopher R</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Physical Education Index</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>ProQuest Biological Science Collection</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Research Library</collection><collection>Biological Science Database</collection><collection>Research Library (Corporate)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><collection>Biotechnology Research Abstracts</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Journal of biomechanics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Butz, Robert C</au><au>Knowles, Brooklynn M</au><au>Newman, James A</au><au>Dennison, Christopher R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of external helmet accessories on biomechanical measures of head injury risk: An ATD study using the HYBRIDIII headform</atitle><jtitle>Journal of biomechanics</jtitle><addtitle>J Biomech</addtitle><date>2015-11-05</date><risdate>2015</risdate><volume>48</volume><issue>14</issue><spage>3816</spage><epage>3824</epage><pages>3816-3824</pages><issn>0021-9290</issn><eissn>1873-2380</eissn><abstract>Abstract Competitive cycling is a popular activity in North America for which injuries to the head account for the majority of hospitalizations and fatalities. In cycling, use of helmet accessories (e.g. cameras) has become widespread. As a consequence, standards organizations and the popular media are discussing the role these accessories could play in altering helmet efficacy and head injury risk. We conducted impacts to a helmeted anthropomorphic headform, with and without camera accessories, at speeds of 4 m/s and 6 m/s, and measured head accelerations, forces on the head-form skull, and used the Simulated Injury Monitor to estimate brain tissue strain. The presence of the camera reduced peak linear head acceleration (51% – 4 m/s impacts, 61% – 6 m/s, p <0.05). Skull fracture risk based on kinematics was always less than 1%. For 4 m/s impacts, peak angular accelerations were lower (47%, p <0.05), as were peak angular velocities (14%) with the velocity effect approaching significance ( p =0.06), with the camera accessory. For 6 m/s impacts, accelerations were on average higher (5%, p >0.05) as were velocities (77%, p <0.05). Skull forces were never greater than 443.2 N, well below forces associated with fracture. Brain tissue strain, the cumulative strain damage measure at 25% (CSDM-25), was lower (56%, p <0.05) in 4 m/s but higher (125%, p >0.05) in 6 m/s impacts with the camera accessory. Based on CSDM-25 for 4 m/s tests, the risk of severe concussion was reduced ( p <0.05) from 25% (no camera) to 7% (camera). For 6 m/s tests, risks were on average increased ( p >0.05) from 18% (no camera) to 58% (camera).</abstract><cop>United States</cop><pub>Elsevier Ltd</pub><pmid>26477409</pmid><doi>10.1016/j.jbiomech.2015.09.032</doi><tpages>9</tpages></addata></record> |
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| subjects | Acceleration Accessories Bicycling Bicycling - injuries Biomechanical Phenomena Biomechanics Brain Brain Concussion - prevention & control Brain research Cameras Craniocerebral Trauma - etiology Craniocerebral Trauma - prevention & control Engineering Fractures Head Head - physiology Head injuries Head Protective Devices Helmet Helmets Humans Impact tests Injury prevention Kinematics Male Photography - instrumentation Physical Medicine and Rehabilitation Polyvinyl chloride Risk Skull Strain Traumatic brain injury Velocity |
| title | Effects of external helmet accessories on biomechanical measures of head injury risk: An ATD study using the HYBRIDIII headform |
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