Show simple item record

dc.contributor.authorRussell, Jeffrey A.
dc.contributor.authorShave, Ruth M
dc.contributor.authorKruse, David W.
dc.contributor.authorKoutedakis, Yiannis
dc.contributor.authorWyon, Matthew A.
dc.date.accessioned2011-05-13T11:01:58Z
dc.date.available2011-05-13T11:01:58Z
dc.date.issued2011
dc.identifier.citationFoot & ankle international, 32 (2):183-8
dc.identifier.issn1071-1007
dc.identifier.pmid21288419
dc.identifier.doi10.3113/FAI.2011.0183
dc.identifier.urihttp://hdl.handle.net/2436/129521
dc.description.abstractBackground: Female ballet dancers require extreme ankle motion. The objective of this study was to quantify the relative contributions of the ankle and various foot joints to extreme plantarflexion (PF) and dorsiflexion (DF) in female ballet dancers using an X-ray superimposition technique and digital graphics software. Materials and Methods: One asymptomatic ankle was studied in each of seven experienced female ballet dancers. Three lateral weightbearing X-rays were taken of each ballet dancer's ankle: en pointe (maximum PF), in neutral position, and in demi-plié (maximum DF). Using graphics software, a subject's three X-ray images were superimposed and the tali were aligned. On each image the tibia, navicular, intermediate cuneiform, and first metatarsal were marked. Positional differences of a bone's line among the three images demonstrated angular movement of the bone in degrees. The neutral position was the reference from which both PF and DF of the bones were calculated. Results: The talocrural joint contributed the most motion of any pair of bones evaluated for both PF and DF, with mean movements of 57.6 ± 5.2 degrees en pointe and 24.6 ± 9.6 degrees in demi-plié. Approximately 70% of total PF and DF were attributable to the talocrural joint, with the remaining 30% coming from motion between adjacent pairs of the studied foot bones. Conclusion: Superimposed X-rays for assessing ankle and foot contributions to the extreme positions required of female ballet dancers offer insight into how these positions are attained that is not available via goniometry. Clinical Relevance: Functional information gained from this study may assist clinicians in assessessing ankle and foot pain in these individuals.
dc.language.isoen
dc.publisherAmerican Orthopaedic Foot and Ankle Society, Inc.
dc.subjectAnkle
dc.subjectAnkle Joint
dc.subjectFoot
dc.subjectSports Medicine
dc.subjectDance
dc.subjectBallet
dc.subject.meshAdult
dc.subject.meshAnkle Joint
dc.subject.meshDancing
dc.subject.meshFemale
dc.subject.meshFoot Bones
dc.subject.meshFoot Joints
dc.subject.meshHumans
dc.subject.meshImage Processing, Computer-Assisted
dc.subject.meshMathematical Concepts
dc.subject.meshSoftware
dc.subject.meshYoung Adult
dc.titleAnkle and foot contributions to extreme plantar- and dorsiflexion in female ballet dancers.
dc.typeJournal article
dc.identifier.journalFoot & ankle international
html.description.abstractBackground: Female ballet dancers require extreme ankle motion. The objective of this study was to quantify the relative contributions of the ankle and various foot joints to extreme plantarflexion (PF) and dorsiflexion (DF) in female ballet dancers using an X-ray superimposition technique and digital graphics software. Materials and Methods: One asymptomatic ankle was studied in each of seven experienced female ballet dancers. Three lateral weightbearing X-rays were taken of each ballet dancer's ankle: en pointe (maximum PF), in neutral position, and in demi-plié (maximum DF). Using graphics software, a subject's three X-ray images were superimposed and the tali were aligned. On each image the tibia, navicular, intermediate cuneiform, and first metatarsal were marked. Positional differences of a bone's line among the three images demonstrated angular movement of the bone in degrees. The neutral position was the reference from which both PF and DF of the bones were calculated. Results: The talocrural joint contributed the most motion of any pair of bones evaluated for both PF and DF, with mean movements of 57.6 ± 5.2 degrees en pointe and 24.6 ± 9.6 degrees in demi-plié. Approximately 70% of total PF and DF were attributable to the talocrural joint, with the remaining 30% coming from motion between adjacent pairs of the studied foot bones. Conclusion: Superimposed X-rays for assessing ankle and foot contributions to the extreme positions required of female ballet dancers offer insight into how these positions are attained that is not available via goniometry. Clinical Relevance: Functional information gained from this study may assist clinicians in assessessing ankle and foot pain in these individuals.


This item appears in the following Collection(s)

Show simple item record