{"id":5977,"date":"2026-10-19T09:48:17","date_gmt":"2026-10-19T09:48:17","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-haraldur-b-sigurdsson\/"},"modified":"2026-10-19T09:48:17","modified_gmt":"2026-10-19T09:48:17","slug":"doktorsvorn-i-heilbrigdisvisindum-haraldur-b-sigurdsson","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-heilbrigdisvisindum-haraldur-b-sigurdsson\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed heilbrig\u00f0isv\u00edsindum – Haraldur B. Sigur\u00f0sson"},"content":{"rendered":"
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Mi\u00f0vikudaginn 18. desember ver Haraldur B. Sigur\u00f0sson doktorsritger\u00f0 s\u00edna \u00ed heilbrig\u00f0isv\u00edsindum vi\u00f0 L\u00e6knadeild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: L\u00edfaflfr\u00e6\u00f0ilegir \u00e1h\u00e6ttu\u00fe\u00e6ttir krossbandaslita – \u00der\u00f3un s\u00e9rt\u00e6krar n\u00e1lgunnar \u00e1 \u00farvinnslu gagna. Biomechanical risk factors for ACL injury – Development of analysis methods specific to injury mechanism.<\/p>\n

Andm\u00e6lendur eru dr. Laura Claire Schmitt, d\u00f3sent vi\u00f0 Ohio State University og dr. Magn\u00fas Kjartan G\u00edslason, d\u00f3sent vi\u00f0 H\u00e1sk\u00f3lann \u00ed Reykjav\u00edk<\/p>\n

Umsj\u00f3narkennari og lei\u00f0beinandi var dr. Krist\u00edn Briem pr\u00f3fessor vi\u00f0 n\u00e1msbraut \u00ed sj\u00fakra\u00fej\u00e1lfun. A\u00f0rir \u00ed doktorsnefnd voru dr. \u00c1rni \u00c1rnason d\u00f3sent, dr. \u00de\u00f3rarinn Sveinsson pr\u00f3fessor, dr. J\u00f3n Karlsson pr\u00f3fessor og dr. Lynn Snyder-Mackler pr\u00f3fessor.<\/p>\n

Dr. S\u00f3lveig \u00c1sa \u00c1rnad\u00f3ttir, d\u00f3sent vi\u00f0 n\u00e1msbraut \u00ed sj\u00fakra\u00fej\u00e1lfun vi\u00f0 H\u00e1sk\u00f3la \u00cdslands, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 10:00.<\/p>\n

\u00c1grip af ranns\u00f3kn<\/strong><\/p>\n

Markmi\u00f0:<\/strong> Markmi\u00f0 doktorsverkefnis var a\u00f0 \u00fer\u00f3a og meta a\u00f0fer\u00f0ir til a\u00f0 vinna \u00far g\u00f6gnum s\u00e9rt\u00e6kt fyrir slit \u00e1 fremra krossbandi til a\u00f0 s\u00ed\u00f0ar ver\u00f0i h\u00e6gt a\u00f0 bera kennsl \u00e1 \u00e1h\u00e6ttu\u00fe\u00e6tti krossbandaslita. Allar ranns\u00f3knir a\u00f0 baki doktorsritger\u00f0ar byggja \u00e1 hreyfigreiningum \u00e1 handbolta og f\u00f3tboltam\u00f6nnum sem fram f\u00f3ru \u00e1 milli 2012-2019.<\/p>\n

Ranns\u00f3kn eitt l\u00fdsir t\u00edmapunktum h\u00e1markski\u00f0v\u00e6gis, h\u00e1marksjar\u00f0krafts, og h\u00e1marks innsn\u00faningsv\u00e6gis og mun milli \u00feeirra hj\u00e1 \u00ed\u00fer\u00f3ttam\u00f6nnum \u00e1 aldrinum 9-12 \u00e1ra. Ni\u00f0urst\u00f6\u00f0ur ranns\u00f3knar voru a\u00f0 st\u00falkur \u00e1 \u00feessum aldri hafa a\u00f0 jafna\u00f0i minni t\u00edma milli sinna krafta heldur en str\u00e1kar sem g\u00e6ti veri\u00f0 v\u00edsbending um a\u00f0 meiri fj\u00f6ldi krafta verki \u00e1 \u00feeirra hn\u00e9 en str\u00e1ka. Ranns\u00f3kn tv\u00f6 kynnir til s\u00f6gunnar a\u00f0fer\u00f0 til klasagreiningar sem \u00fer\u00f3u\u00f0 var fyrir hreyfigreiningarg\u00f6gn og mi\u00f0ast vi\u00f0 a\u00f0 bera kennsl \u00e1 mynstur sem fela \u00ed s\u00e9r snemmb\u00fana toppa ki\u00f0v\u00e6gis me\u00f0 t\u00edmasetningu \u00e1l\u00edka t\u00edmasetningu krossbandaslita. Ranns\u00f3kn \u00ferj\u00fa athugar samb\u00f6nd milli hreyfinga sem l\u00fdst hefur veri\u00f0 samhli\u00f0a krossbandaslitum og snemmb\u00fainna toppa fundna me\u00f0 klasagreiningu. Ni\u00f0urst\u00f6\u00f0ur ranns\u00f3kna tv\u00f6 og \u00ferj\u00fa eru a\u00f0 h\u00e6gt er a\u00f0 bera kennsl \u00e1 snemmb\u00fana toppa me\u00f0 klasagreiningu, og a\u00f0 snemmb\u00fanir toppar fylgjast a\u00f0 einhverju leiti a\u00f0 me\u00f0 hreyfingum sem eiga s\u00e9r sta\u00f0 vi\u00f0 krossbandaslit.<\/p>\n

Samstarfsa\u00f0ilar ranns\u00f3knarinnar eru Rann\u00eds sem styrkja ranns\u00f3knina, KS\u00cd sem hefur styrkt Harald til r\u00e1\u00f0stefnufer\u00f0ar, Sigur\u00f0ur Brynj\u00f3lfsson, Pr\u00f3fessor, \u00d3lafur P\u00e9tur P\u00e1lsson, Pr\u00f3fessor, og \u00ed\u00fer\u00f3ttaf\u00e9l\u00f6g \u00e1 h\u00f6fu\u00f0borgarsv\u00e6\u00f0i sem t\u00f3ku \u00fe\u00e1tt \u00ed ranns\u00f3kninni.<\/p>\n

Abstract<\/strong><\/p>\n

The aim of the doctoral thesis was to develop and evaluate methods of analyzing motion analysis data in a manner specific to the anterior cruciate ligament injury mechanism in order to identify candidate risk factors. The papers the thesis is built upon involve motion analysis data collected on soccer and handball athletes collected between the years 2012-2019.<\/p>\n

Paper I analysis the early peak timing of the knee valgus moment, knee internal rotation moment, and the peak ground reaction force in athletes aged 9-12. The results were that girls in this age bracket have less time between force peaks, which could indicate a greater frequency of multiple forces acting on the knee simultaneously. Paper II presents a cluster analysis method developed for motion analysis data to identify movements with early peak knee valgus moments. Paper III analyzed the relationship between kinematics observed during anterior cruciate ligament injury, and early peaks identified with cluster analysis. The results of papers II and III are that early peak knee valgus moments can be identified with cluster analysis and that the clusters formed have relationships with the kinematics observed during injury.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

Haraldur B. Sigur\u00f0sson er f\u00e6ddur \u00e1ri\u00f0 1983 \u00ed Reykjav\u00edk. Hann hefur st\u00fadentspr\u00f3f fr\u00e1 Menntask\u00f3lanum vi\u00f0 Hamrahl\u00ed\u00f0, BSc \u00ed Sj\u00fakra\u00fej\u00e1lfun fr\u00e1 H\u00e1sk\u00f3la \u00cdslands og MSc \u00ed \u00cd\u00fer\u00f3ttasj\u00fakra\u00fej\u00e1lfun fr\u00e1 Lund. Haraldur hefur starfa\u00f0 m.a. starfa\u00f0 \u00e1 Sunnuhl\u00ed\u00f0 og Heilsuborg. Doktorsn\u00e1m sitt vi\u00f0 H\u00e1sk\u00f3la \u00cdslands h\u00f3f Haraldur 2016. Eiginkona Haralds er \u00deorbj\u00f6rg \u00de\u00f3rhildur Snorrad\u00f3ttir, hj\u00fakrunarfr\u00e6\u00f0ingur.<\/p>\n<\/div><\/div>","protected":false},"featured_media":1158,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2019-12-18T10:00:00+00:00","_phd_date_end":"2019-12-18T13:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"L\u00edfaflfr\u00e6\u00f0ilegir \u00e1h\u00e6ttu\u00fe\u00e6ttir krossbandaslita - \u00der\u00f3un s\u00e9rt\u00e6krar n\u00e1lgunnar \u00e1 \u00farvinnslu gagna. 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