Dataset Information

Biplanar ultrasound investigation of in vivo Achilles tendon displacement non-uniformity.

ABSTRACT: The Achilles tendon is a common tendon for the medial and lateral gastrocnemius and soleus muscles. Non-uniform Achilles tendon regional displacements have been observed in vivo which may result from non-uniform muscle loading and intra-tendinous shearing. However, prior observations are limited to the sagittal plane. This study investigated Achilles tendon tissue displacement patterns during isometric plantarflexor contractions in the coronal and sagittal planes. Fourteen subjects (5 female, 9 male, 26±3 yr) performed maximal isometric plantarflexor contractions with the knee in full extension and flexed to 110°. An ultrasound transducer positioned over the free Achilles tendon collected beam formed radio frequency (RF) data at 70 frames/s. Localized tissue displacements were analyzed using a speckle tracking algorithm. We observed non-uniform Achilles tendon tissue displacements in both imaging planes. Knee joint posture had no significant effect on tissue displacement patterns in either imaging plane. The non-uniform Achilles tendon tissue displacements during loading may arise from the anatomical organization of the sub-tendons associated with the three heads of the triceps surae. The biplanar investigation suggests that greatest displacements are localized to tissue likely to belong to soleus sub-tendon. This study adds novel information with possible implications for muscle coordination, function and muscle-tendon injury mechanisms.

SUBMITTER: Stenroth L

PROVIDER: S-EPMC6472705 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Biplanar ultrasound investigation of <i>in vivo</i> Achilles tendon displacement non-uniformity.

Stenroth Lauri L Thelen Darryl D Franz Jason J

Translational sports medicine 20181201 2

The Achilles tendon is a common tendon for the medial and lateral gastrocnemius and soleus muscles. Non-uniform Achilles tendon regional displacements have been observed <i>in vivo</i> which may result from non-uniform muscle loading and intra-tendinous shearing. However, prior observations are limited to the sagittal plane. This study investigated Achilles tendon tissue displacement patterns during isometric plantarflexor contractions in the coronal and sagittal planes. Fourteen subjects (5 fem ...[more]

PMID: 31008448

Similar Datasets

Project description:Aim:To develop a standardised ultrasound imaging (USI)-based criteria for the diagnosis of tendinopathy that aligns with the continuum model of tendon pathology. Secondary aims were to assess both the intra-rater and inter-rater reliability of the criteria. Methods:A criteria was developed following a face validity assessment and a total of 31 Achilles tendon ultrasound images were analysed. Intra-rater and inter-rater reliability were assessed for overall tendinopathy stage (normal, reactive/early dysrepair or late dysrepair/degenerative) as well as for individual parameters (thickness, echogenicity and vascularity). Quadratic weighted kappa (kw) was used to report on reliability. Results:Intra-rater reliability was 'substantial' for overall tendinopathy staging (kw rater A; 0.77, 95%?CI 0.59 to 0.94, rater B; 0.70, 95%?CI 0.52 to 0.89) and ranged from 'substantial' to 'almost perfect' for thickness (kw rater A; 0.75, 95%?CI 0.59 to 0.90, rater B; 0.84, 95%?CI 0.71 to 0.98), echogenicity (kw rater A; 0.78, 95%?CI 0.62 to 0.95, rater B; 0.73, 95%?CI 0.58 to 0.89) and vascularity (kw rater A; 0.86, 95%?CI 0.74 to 0.98, rater B; 0.89, 95%?CI 0.79 to 0.99). Inter-rater reliability ranged from 'substantial' to 'almost perfect' for overall tendinopathy staging (kw round 1; 0.75, 95%?CI 0.58 to 0.91, round 2; 0.81, 95%?CI 0.63 to 0.99), thickness (kw round 1; 0.65, 95%?CI 0.48 to 0.83, round 2; 0.77, 95%?CI 0.60 to 0.93), echogenicity (kw round 1; 0.70, 95%?CI 0.54 to 0.85, round 2; 0.76, 95%?CI 0.58 to 0.94) and vascularity (kw round 1; 0.89, 95%?CI 0.79 to 0.99, round 2; 0.86, 95%?CI 0.74 to 0.98). Inter-rater reliability increased from 'substantial' in round 1 (kw 0.75, 95%?CI 0.58 to 0.91) to 'almost perfect' in round 2 (0.81, 95%?CI 0.63 to 0.99). Conclusion:Intra-rater and inter-rater reliability were 'substantial' to 'almost perfect' when utilising an USI-based criteria to diagnose Achilles tendinopathy. This is the first study to use the continuum model of tendon pathology to develop an USI-based criteria to diagnose tendinopathy.

Dataset Information

Biplanar ultrasound investigation of in vivo Achilles tendon displacement non-uniformity.

Publications

Biplanar ultrasound investigation of <i>in vivo</i> Achilles tendon displacement non-uniformity.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets