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dc.contributor.authorZuniga J.M.
dc.contributor.authorDimitrios K.
dc.contributor.authorPeck J.L.
dc.contributor.authorSrivastava R.
dc.contributor.authorPierce J.E.
dc.contributor.authorDudley D.R.
dc.contributor.authorSalazar D.A.
dc.contributor.authorYoung K.J.
dc.contributor.authorKnarr B.A.
dc.date.accessioned2020-09-02T22:31:00Z
dc.date.available2020-09-02T22:31:00Z
dc.date.issued2018
dc.identifier10.1186/s12984-018-0392-9
dc.identifier.citation15, 1, -
dc.identifier.issn17430003
dc.identifier.urihttps://hdl.handle.net/20.500.12728/6674
dc.descriptionBackground: Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces forces around a joint. It is unknown if the use of a wrist-driven 3D printed transitional prostheses has any influence on the neuromuscular motor control strategies of the affected hand of children with unilateral upper-limb reduction deficiencies. Thus, the purpose of the current investigation was to examine the coactivation index (CI) of children with congenital upper-limb reduction deficiencies before and after 6 months of using a wrist-driven 3D printed partial hand prosthesis. Methods: Electromyographic activity of wrist flexors and extensors (flexor carpi ulnaris and extensor digitorum) was recorded during maximal voluntary contraction of the affected and non-affected wrists. Co-contraction was calculated using the coactivation index and was expressed as percent activation of antagonist over agonist. Nine children (two girls and seven boys, 6 to 16 years of age) with congenital upper-limb deficiencies participated in this study and were fitted with a wrist-driven 3D printed prosthetic hand. From the nine children, five (two girls and three boys, 7 to 10 years of age) completed a second visit after using the wrist-driven 3D printed partial hand prosthesis for 6 months. Results: Separate two-way repeated measures ANOVAs were performed to analyze the coactivation index and strength data. There was a significant main effect for hand with the affected hand resulting in a higher coactivation index for flexion and extension than the non-affected hand. For wrist flexion there was a significant main effect for time indicating that the affected and non-affected hand had a significantly lower coactivation index after a period of 6 months. Conclusion: The use of a wrist-driven 3D printed hand prosthesis lowered the coactivation index by 70% in children with congenital upper limb reduction deficiencies. This reduction in coactivation and possible improvement in motor control strategies can potentially improve prosthetic rehabilitation outcomes. © 2018 The Author(s).
dc.language.isoen
dc.publisherBioMed Central Ltd.
dc.subjectAdditive manufacturing
dc.subjectArm
dc.subjectBiomechanics
dc.subjectComputer-aided design
dc.subjectCustom-made prostheses
dc.subjectHand
dc.subjectMotor control
dc.subjectPediatric
dc.subjectReaching
dc.subjectadolescent
dc.subjectArticle
dc.subjectchild
dc.subjectclinical article
dc.subjectcoactivation index
dc.subjectcongenital upper limb reduction deficiency
dc.subjectcontrolled study
dc.subjectelectromyography
dc.subjectextensor digitorum muscle
dc.subjectfemale
dc.subjectflexor carpi ulnaris muscle
dc.subjecthuman
dc.subjectlimb reduction defect
dc.subjectmale
dc.subjectmaximal voluntary isometric contraction
dc.subjectmeasurement
dc.subjectmuscle isometric contraction
dc.subjectmuscle strength
dc.subjectpriority journal
dc.subjectrange of motion
dc.subjectskeletal muscle
dc.subjectwrist driven 3D printed partial hand prosthesis
dc.subjectlimb prosthesis
dc.subjectmuscle contraction
dc.subjectphysiology
dc.subjectthree dimensional printing
dc.subjectupper limb
dc.subjectArtificial Limbs
dc.subjectChild
dc.subjectFemale
dc.subjectHumans
dc.subjectMale
dc.subjectMuscle Contraction
dc.subjectMuscle, Skeletal
dc.subjectPrinting, Three-Dimensional
dc.subjectUpper Extremity
dc.titleCoactivation index of children with congenital upper limb reduction deficiencies before and after using a wrist-driven 3D printed partial hand prosthesis
dc.typeArticle


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