{"id":6477,"date":"2026-10-19T09:48:57","date_gmt":"2026-10-19T09:48:57","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-lif-og-laeknavisindum-faranak-rostamjoud\/"},"modified":"2026-10-19T09:48:57","modified_gmt":"2026-10-19T09:48:57","slug":"doktorsvorn-i-lif-og-laeknavisindum-faranak-rostamjoud","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-lif-og-laeknavisindum-faranak-rostamjoud\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edf- og l\u00e6knav\u00edsindum &#8211; Faranak Rostamjoud"},"content":{"rendered":"<div class=\"field-items\">\n<div class=\"field-item even\" property=\"content:encoded\">\n<p>Mi\u00f0vikudaginn 24. j\u00fan\u00ed ver Faranak Rostamjoud doktorsritger\u00f0 s\u00edna \u00ed l\u00edf- og l\u00e6knav\u00edsindum vi\u00f0 L\u00e6knadeild H\u00e1sk\u00f3la \u00cdslands. Ritger\u00f0in ber heiti\u00f0: V\u00f6\u00f0vastarfsemi hj\u00e1 einstaklingum me\u00f0 aflimun ne\u00f0an hn\u00e9s: Bygging og viljast\u00fdr\u00f0 virkni, og \u00e1rei\u00f0anleiki v\u00f6\u00f0varafrits fyrir st\u00fdringu gervif\u00f3tar.<\/p>\n<p>Andm\u00e6lendur eru dr. J. Megan Sions, d\u00f3sent vi\u00f0 University of Delaware, og\u00a0 dr. Herman van der Kooij, pr\u00f3fessor vi\u00f0 University of Twente, Hollandi.<\/p>\n<p>Umsj\u00f3narkennari og lei\u00f0beinandi var Krist\u00edn Briem, pr\u00f3fessor og me\u00f0lei\u00f0beinandi var Sigur\u00f0ur Brynj\u00f3lfsson, pr\u00f3fessor. Auk \u00feeirra s\u00e1tu \u00ed doktorsnefnd Atli \u00d6rn Sverrisson, ranns\u00f3knarverkfr\u00e6\u00f0ingur og Haraldur Bj\u00f6rn Sigur\u00f0sson, d\u00f3sent.<\/p>\n<p>\u00dej\u00f3\u00f0bj\u00f6rg Gu\u00f0j\u00f3nsd\u00f3ttir, d\u00f3sent og varan\u00e1msbrautarforma\u00f0ur, stj\u00f3rnar ath\u00f6fninni sem fer fram \u00ed H\u00e1t\u00ed\u00f0asal H\u00e1sk\u00f3la \u00cdslands og hefst kl. 13.00.<\/p>\n<p>V\u00f6rninni ver\u00f0ur streymt:\u00a0<\/p>\n<p><a href=\"https:\/\/vimeo.com\/event\/6010976\">https:\/\/vimeo.com\/event\/6010976<\/a><\/p>\n<p><strong>\u00c1grip<\/strong><\/p>\n<p>Einstaklingar me\u00f0 aflimun ne\u00f0an hn\u00e9s nota oft gervif\u00e6tur sem eru \u00f3virkir og geta ekki a\u00f0 fullu l\u00edkt eftir starfsemi l\u00edffr\u00e6\u00f0ilegs \u00f6kkla og f\u00f3tar. \u00deetta hefur neikv\u00e6\u00f0 \u00e1hrif \u00e1 getu til fr\u00e1spyrnu, a\u00f0l\u00f6gun a\u00f0 undirlagi og jafnv\u00e6gi \u00ed g\u00f6ngu. Aflkn\u00fanir gervif\u00e6tur geta m\u00f6gulega b\u00e6tt hreyfigetu, en \u00e1rangur \u00feeirra veltur \u00e1 \u00fev\u00ed hversu vel \u00feeir breg\u00f0ast vi\u00f0 \u00e1setningi notandans. St\u00fdringar sem byggja \u00e1 v\u00f6\u00f0varafriti lofa g\u00f3\u00f0u, \u00fear sem rafvirkni fr\u00e1 eftirstandandi v\u00f6\u00f0vum er notu\u00f0 til a\u00f0 st\u00fdra gervif\u00e6tinum.<\/p>\n<p>\u00cd \u00feessu doktorsverkefni var rannsaka\u00f0 hvort eftirstandandi v\u00f6\u00f0var hj\u00e1 einstaklingum me\u00f0 aflimun ne\u00f0an hn\u00e9s geti n\u00fdst sem stj\u00f3rnt\u00e6ki fyrir n\u00fdja tegund gervif\u00f3tar. Verkefni\u00f0 t\u00f3k til v\u00f6\u00f0vabyggingar og viljast\u00fdr\u00f0rar virkjunar, g\u00e6\u00f0a v\u00f6\u00f0varafritsmerkja, \u00e1hrifa \u00fej\u00e1lfunar og \u00feess hvort unnt v\u00e6ri a\u00f0 st\u00fdra n\u00fdrri ger\u00f0 af aflkn\u00fanum \u00f6kkla me\u00f0 \u00feessum h\u00e6tti vi\u00f0 g\u00f6ngu.<\/p>\n<p>Ni\u00f0urst\u00f6\u00f0urnar s\u00fdndu a\u00f0 notkun \u00f3msko\u00f0unar b\u00e6tti au\u00f0kenningu v\u00f6\u00f0va og sta\u00f0setningu rafskauta, me\u00f0 auknum g\u00e6\u00f0um v\u00f6\u00f0varitsmerkja. \u00de\u00f3tt eftirstandandi v\u00f6\u00f0var \u00e1 aflima\u00f0a \u00fatlimnum hef\u00f0u or\u00f0i\u00f0 fyrir r\u00fdrnun var samdr\u00e1ttur m\u00e6lanlegur og \u00fe\u00e1tttakendur s\u00fdndu getu til a\u00f0 virkja \u00fe\u00e1 markvisst. \u00dej\u00e1lfun b\u00e6tti s\u00e9rt\u00e6ka virkjun og n\u00e1kv\u00e6mni v\u00f6\u00f0vasamdr\u00e1ttar, sem og st\u00f6\u00f0ugleika v\u00f6\u00f0varafritsmerkja. \u00de\u00e1tttakendur ranns\u00f3knarinnar s\u00fdndu getu til a\u00f0 virkja eftirstandandi v\u00f6\u00f0va markvisst vi\u00f0 g\u00f6ngu og st\u00fdra me\u00f0 \u00fev\u00ed \u00f6kklahreyfingu \u00ed frumger\u00f0 aflkn\u00fains gervif\u00f3tar. N\u00faverandi frumger\u00f0 leiddi \u00fe\u00f3 ekki til sk\u00fdrra, hagkv\u00e6mra breytinga \u00e1 l\u00edfaflfr\u00e6\u00f0ilegum \u00fe\u00e1ttum \u00ed g\u00f6ngu samanbori\u00f0 vi\u00f0 hef\u00f0bundna \u00f3virka gervif\u00e6tur. \u00c1 heildina liti\u00f0 s\u00fdnir efni ritger\u00f0arinnar fram \u00e1 a\u00f0 notkun viljast\u00fdr\u00f0rar st\u00fdringar me\u00f0 v\u00f6\u00f0varafriti er raunh\u00e6fur kostur og sty\u00f0ur \u00e1framhaldandi \u00fer\u00f3un og ranns\u00f3knir \u00e1 svi\u00f0inu.<\/p>\n<p><strong>Abstract:<\/strong><\/p>\n<p>People with transtibial amputation often use prosthetic feet that are passive and cannot fully replicate the function of the biological ankle and foot. This negatively affects push-off capacity, adaptation to different surfaces, and balance during walking. Powered prosthetic feet may improve mobility, but their success depends on how well they respond to the user\u2019s intention. One promising approach is myoelectric control, where electrical activity from residual muscles is used to control the prosthesis.<\/p>\n<p>This doctoral project investigated whether residual muscles in transtibial amputees can be used as a control source for a new type of prosthetic foot. The project examined muscle structure, voluntary activation, EMG signal quality, training effects, and the feasibility of controlling a novel powered ankle prosthesis during walking.<\/p>\n<p>The results showed that the use of ultrasound improved muscle identification and electrode placement, resulting in higher-quality electromyography signals. Although the residual muscles on the amputated limb had undergone atrophy, contraction was measurable and participants demonstrated the ability to activate them purposefully. Training improved selective activation, contraction accuracy, and the stability of electromyography signals. The study participants demonstrated the ability to activate residual muscles purposefully during walking and thereby control ankle movement in a prototype of a powered prosthetic foot. However, the current prototype did not produce clear beneficial changes in gait biomechanics compared with conventional passive prosthetic feet. Overall, the thesis demonstrates that the use of volitional control based on electromyography is a feasible option and supports continued development and research in the field.<\/p>\n<p><strong>Um doktorsefni\u00f0<\/strong><\/p>\n<p>Faranak Rostamjoud f\u00e6ddist \u00ed \u00cdran \u00e1ri\u00f0 1993. H\u00fan lauk b\u00e6\u00f0i BS- og MS-pr\u00f3fi \u00ed l\u00edfverkfr\u00e6\u00f0i me\u00f0 \u00e1herslu \u00e1 l\u00edfaflfr\u00e6\u00f0i fr\u00e1 Azad University, Science and Research Branch, \u00ed Teheran. \u00c1ri\u00f0 2023 flutti h\u00fan til \u00cdslands og h\u00f3f doktorsn\u00e1m vi\u00f0 L\u00e6knadeild H\u00e1sk\u00f3la \u00cdslands. Eiginma\u00f0ur hennar er Mohammad Mahdi Karimi, heilbrig\u00f0isverkfr\u00e6\u00f0ingur og doktorsnemi.<\/p>\n<\/div><\/div>","protected":false},"featured_media":5898,"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":"2026-06-24T13:00:00+00:00","_phd_date_end":"2026-06-24T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"V\u00f6\u00f0vastarfsemi hj\u00e1 einstaklingum me\u00f0 aflimun ne\u00f0an hn\u00e9s: Bygging og viljast\u00fdr\u00f0 virkni, og \u00e1rei\u00f0anleiki v\u00f6\u00f0varafrits fyrir st\u00fdringu gervif\u00f3tar","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_lif_og_laeknavisindum_faranak_rostamjoud","_phd_source_node_id":"444263","_phd_source_type":"vidburdir","_phd_member_id":1021,"footnotes":""},"phd_school":[60,67],"phd_discipline":[70],"class_list":["post-6477","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-heilbrigdisvisindasvid","phd_school-laeknadeild","phd_discipline-phd-i-lif-og-laeknavisindum"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6477","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6477\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/5898"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6477"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6477"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}