{"id":"https://openalex.org/W4416749372","doi":"https://doi.org/10.1109/iros60139.2025.11246205","title":"Exploring the Virtual Pivot Point in Unilateral Transfemoral Amputee Locomotion: Implications for Prosthetic Development","display_name":"Exploring the Virtual Pivot Point in Unilateral Transfemoral Amputee Locomotion: Implications for Prosthetic Development","publication_year":2025,"publication_date":"2025-10-19","ids":{"openalex":"https://openalex.org/W4416749372","doi":"https://doi.org/10.1109/iros60139.2025.11246205"},"language":null,"primary_location":{"id":"doi:10.1109/iros60139.2025.11246205","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iros60139.2025.11246205","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5012663809","display_name":"Omid Mohseni","orcid":"https://orcid.org/0000-0003-2601-1958"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Omid Mohseni","raw_affiliation_strings":["Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010696422","display_name":"Serajeddin Ebrahimian","orcid":"https://orcid.org/0000-0002-2255-8000"},"institutions":[{"id":"https://openalex.org/I175532246","display_name":"University of Eastern Finland","ror":"https://ror.org/00cyydd11","country_code":"FI","type":"education","lineage":["https://openalex.org/I175532246"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Serajeddin Ebrahimian","raw_affiliation_strings":["University of Eastern Finland,Department of Technical Physics,Kuopio,Finland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Eastern Finland,Department of Technical Physics,Kuopio,Finland","institution_ids":["https://openalex.org/I175532246"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5006221450","display_name":"Vahid Firouzi","orcid":"https://orcid.org/0000-0002-3645-2338"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Vahid Firouzi","raw_affiliation_strings":["Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5020031622","display_name":"Morteza Khosrotabar","orcid":"https://orcid.org/0000-0002-7143-5285"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Morteza Khosrotabar","raw_affiliation_strings":["Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5022882347","display_name":"Mario Kupnik","orcid":"https://orcid.org/0000-0003-2287-4481"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Mario Kupnik","raw_affiliation_strings":["Technical University of Darmstadt,Measurement and Sensor Technology Group,Department of Electrical Engineering and Information Technology,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Measurement and Sensor Technology Group,Department of Electrical Engineering and Information Technology,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017524660","display_name":"Maziar A. Sharbafi","orcid":"https://orcid.org/0000-0001-5727-7527"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Maziar A. Sharbafi","raw_affiliation_strings":["Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5015080938","display_name":"Andr\u00e9 Seyfarth","orcid":"https://orcid.org/0000-0001-8285-2415"},"institutions":[{"id":"https://openalex.org/I31512782","display_name":"Technische Universit\u00e4t Darmstadt","ror":"https://ror.org/05n911h24","country_code":"DE","type":"education","lineage":["https://openalex.org/I31512782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Andr\u00e9 Seyfarth","raw_affiliation_strings":["Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Darmstadt,Lauflabor Locomotion Laboratory, Centre for Cognitive Science,Darmstadt,Germany","institution_ids":["https://openalex.org/I31512782"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"8254","last_page":"8260"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11023","display_name":"Prosthetics and Rehabilitation Robotics","score":0.9666000008583069,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11023","display_name":"Prosthetics and Rehabilitation Robotics","score":0.9666000008583069,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10784","display_name":"Muscle activation and electromyography studies","score":0.0203000009059906,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10114","display_name":"Balance, Gait, and Falls Prevention","score":0.00559999980032444,"subfield":{"id":"https://openalex.org/subfields/3612","display_name":"Physical Therapy, Sports Therapy and Rehabilitation"},"field":{"id":"https://openalex.org/fields/36","display_name":"Health Professions"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sagittal-plane","display_name":"Sagittal plane","score":0.7576000094413757},{"id":"https://openalex.org/keywords/gait","display_name":"Gait","score":0.5633999705314636},{"id":"https://openalex.org/keywords/point","display_name":"Point (geometry)","score":0.5156999826431274},{"id":"https://openalex.org/keywords/gait-analysis","display_name":"Gait analysis","score":0.4961000084877014},{"id":"https://openalex.org/keywords/ground-reaction-force","display_name":"Ground reaction force","score":0.4812999963760376},{"id":"https://openalex.org/keywords/coronal-plane","display_name":"Coronal plane","score":0.421999990940094},{"id":"https://openalex.org/keywords/control","display_name":"Control (management)","score":0.3695000112056732},{"id":"https://openalex.org/keywords/barefoot","display_name":"Barefoot","score":0.35600000619888306},{"id":"https://openalex.org/keywords/biomechanics","display_name":"Biomechanics","score":0.3540000021457672}],"concepts":[{"id":"https://openalex.org/C178910020","wikidata":"https://www.wikidata.org/wiki/Q2211994","display_name":"Sagittal plane","level":2,"score":0.7576000094413757},{"id":"https://openalex.org/C99508421","wikidata":"https://www.wikidata.org/wiki/Q2678675","display_name":"Physical medicine and rehabilitation","level":1,"score":0.5800999999046326},{"id":"https://openalex.org/C151800584","wikidata":"https://www.wikidata.org/wiki/Q2370000","display_name":"Gait","level":2,"score":0.5633999705314636},{"id":"https://openalex.org/C28719098","wikidata":"https://www.wikidata.org/wiki/Q44946","display_name":"Point (geometry)","level":2,"score":0.5156999826431274},{"id":"https://openalex.org/C173906292","wikidata":"https://www.wikidata.org/wiki/Q1493441","display_name":"Gait analysis","level":3,"score":0.4961000084877014},{"id":"https://openalex.org/C96332660","wikidata":"https://www.wikidata.org/wiki/Q5610971","display_name":"Ground reaction force","level":3,"score":0.4812999963760376},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.46380001306533813},{"id":"https://openalex.org/C13483470","wikidata":"https://www.wikidata.org/wiki/Q1470152","display_name":"Coronal plane","level":2,"score":0.421999990940094},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.3695000112056732},{"id":"https://openalex.org/C44154836","wikidata":"https://www.wikidata.org/wiki/Q45045","display_name":"Simulation","level":1,"score":0.36239999532699585},{"id":"https://openalex.org/C2779342965","wikidata":"https://www.wikidata.org/wiki/Q808132","display_name":"Barefoot","level":2,"score":0.35600000619888306},{"id":"https://openalex.org/C170700871","wikidata":"https://www.wikidata.org/wiki/Q193378","display_name":"Biomechanics","level":2,"score":0.3540000021457672},{"id":"https://openalex.org/C143733281","wikidata":"https://www.wikidata.org/wiki/Q372949","display_name":"Bipedalism","level":2,"score":0.3334999978542328},{"id":"https://openalex.org/C2777303404","wikidata":"https://www.wikidata.org/wiki/Q759757","display_name":"Convergence (economics)","level":2,"score":0.3319000005722046},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.33160001039505005},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.32190001010894775},{"id":"https://openalex.org/C76542214","wikidata":"https://www.wikidata.org/wiki/Q604830","display_name":"Center of pressure (fluid mechanics)","level":3,"score":0.3149999976158142},{"id":"https://openalex.org/C104114177","wikidata":"https://www.wikidata.org/wiki/Q79782","display_name":"Motion (physics)","level":2,"score":0.29319998621940613},{"id":"https://openalex.org/C2777036941","wikidata":"https://www.wikidata.org/wiki/Q6917771","display_name":"Motion analysis","level":2,"score":0.29109999537467957},{"id":"https://openalex.org/C2987804222","wikidata":"https://www.wikidata.org/wiki/Q5376582","display_name":"End point","level":2,"score":0.2741999924182892},{"id":"https://openalex.org/C2779530757","wikidata":"https://www.wikidata.org/wiki/Q1207505","display_name":"Quality (philosophy)","level":2,"score":0.2712000012397766},{"id":"https://openalex.org/C70770792","wikidata":"https://www.wikidata.org/wiki/Q7239848","display_name":"Preferred walking speed","level":2,"score":0.2703999876976013},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.26919999718666077},{"id":"https://openalex.org/C39920418","wikidata":"https://www.wikidata.org/wiki/Q11476","display_name":"Kinematics","level":2,"score":0.26429998874664307},{"id":"https://openalex.org/C145565327","wikidata":"https://www.wikidata.org/wiki/Q852514","display_name":"Motion control","level":3,"score":0.2563000023365021},{"id":"https://openalex.org/C16345878","wikidata":"https://www.wikidata.org/wiki/Q107472979","display_name":"Orientation (vector space)","level":2,"score":0.2533000111579895},{"id":"https://openalex.org/C174440990","wikidata":"https://www.wikidata.org/wiki/Q681349","display_name":"Point-to-point","level":2,"score":0.25290000438690186}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/iros60139.2025.11246205","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iros60139.2025.11246205","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W1974681277","https://openalex.org/W1977662294","https://openalex.org/W1982357471","https://openalex.org/W1985564641","https://openalex.org/W1990999632","https://openalex.org/W2029058516","https://openalex.org/W2032574425","https://openalex.org/W2070839171","https://openalex.org/W2074181618","https://openalex.org/W2092020325","https://openalex.org/W2110065044","https://openalex.org/W2130147724","https://openalex.org/W2136396421","https://openalex.org/W2154553161","https://openalex.org/W2169238142","https://openalex.org/W2744332385","https://openalex.org/W2767539835","https://openalex.org/W2904225065","https://openalex.org/W3004334200","https://openalex.org/W3026556814","https://openalex.org/W3102929077","https://openalex.org/W3136613179","https://openalex.org/W4205387650","https://openalex.org/W4229025744","https://openalex.org/W4234540504","https://openalex.org/W4321377927","https://openalex.org/W4327493826","https://openalex.org/W4378882533","https://openalex.org/W4382468006","https://openalex.org/W4383197717","https://openalex.org/W4387618455","https://openalex.org/W4391306076","https://openalex.org/W4393197303","https://openalex.org/W4401072604","https://openalex.org/W4402789327"],"related_works":[],"abstract_inverted_index":{"The":[0],"virtual":[1],"pivot":[2,115],"point":[3,8],"(VPP),":[4],"a":[5,42,86,113,157],"theoretical":[6],"convergence":[7],"of":[9,33,46,76,112,143,153,160,175],"ground":[10],"reaction":[11],"forces":[12],"during":[13,116],"gait,":[14],"has":[15],"gained":[16],"attention":[17],"for":[18],"its":[19],"potential":[20],"to":[21,74,166,188],"uncover":[22],"underlying":[23],"locomotor":[24],"control":[25,190],"strategies.":[26],"Here,":[27],"we":[28],"present":[29],"the":[30,98,110,141,161,167,173],"first":[31],"investigation":[32],"VPP":[34,71,90,101,120,154,164],"in":[35,97,128,136,148,179,185],"individuals":[36,138],"with":[37,79,123],"unilateral":[38],"above-knee":[39],"amputation,":[40],"using":[41],"publicly":[43],"available":[44],"dataset":[45],"18":[47],"participants.":[48],"Subjects":[49],"were":[50],"categorized":[51],"into":[52],"K2":[53],"(walking":[54],"speeds":[55],"0.4\u20130.8m/s)":[56],"and":[57,92,106,182,191],"K3":[58,129],"(0.6\u20131.4m/s)":[59],"functional":[60],"levels.":[61],"Our":[62],"findings":[63,171],"show":[64],"that":[65,75],"both":[66],"groups":[67],"demonstrate":[68],"high":[69],"sagittal-plane":[70],"quality,":[72,108],"comparable":[73],"healthy":[77,137],"individuals,":[78],"R<sup":[80],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[81],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">2</sup>":[82],">":[83],"95%,":[84],"indicating":[85,109],"strong":[87],"relationship":[88],"between":[89],"formation":[91],"sagittal":[93],"plane":[94,177],"dynamics.":[95],"Conversely,":[96],"frontal":[99,176],"plane,":[100],"analysis":[102,152],"reveals":[103,156],"greater":[104],"variability":[105],"lower":[107],"absence":[111],"well-defined":[114],"gait.":[117,196],"Notably,":[118],"frontal-plane":[119],"quality":[121],"deteriorates":[122],"increasing":[124],"walking":[125],"speed,":[126],"particularly":[127],"ambulators.":[130],"While":[131],"this":[132],"speed-dependency":[133],"is":[134,145],"observed":[135],"as":[139],"well,":[140],"rate":[142],"decline":[144],"significantly":[146],"steeper":[147],"amputees.":[149],"Additionally,":[150],"spatial":[151],"positions":[155],"consistent":[158],"elevation":[159],"amputated":[162],"leg\u2019s":[163],"compared":[165],"intact":[168],"leg.":[169],"These":[170],"emphasize":[172],"importance":[174],"dynamics":[178],"amputee":[180],"gait":[181],"suggest":[183],"improvements":[184],"prosthetic":[186],"design":[187],"enhance":[189],"promote":[192],"more":[193],"symmetrical,":[194],"natural":[195]},"counts_by_year":[{"year":2026,"cited_by_count":2}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-11-28T00:00:00"}
