The popliteal eminence shows that the intra-articular popliteal tendon supports posterolateral knee stability.
Intra-articular popliteal tendon
Knee anatomy
Knee stabilizer
Popliteal eminence
Posterolateral corner
Journal
Anatomical science international
ISSN: 1447-073X
Titre abrégé: Anat Sci Int
Pays: Japan
ID NLM: 101154140
Informations de publication
Date de publication:
18 Nov 2023
18 Nov 2023
Historique:
received:
31
07
2023
accepted:
28
10
2023
medline:
18
11
2023
pubmed:
18
11
2023
entrez:
18
11
2023
Statut:
aheadofprint
Résumé
The intra-articular popliteal tendon (iPT) is responsible for the dynamic stability of the posterolateral part of the knee joint. In this study, the involvement of the iPT in posterolateral stability in response to knee flexion was investigated anatomically. Thirty-one knees from thirty formalin-fixed room cadavers (17 male knees, 14 female knees; average age 86.9 years) were used. The knee was prepared with the distal 1/3 of the lower femur and crus and was flexed at 0°, 30°, 60°, and 90° in a special jig to limit knee rotation. The series of movements was plotted on the coordinate system using the Quadrant method. The iPT was in strong contact with a thick cartilage area, which we called the "popliteal eminence", at the lateral condyle of the femur. The average iPT angles with respect to the femoral axis were 28.78°, 49.79°, 77.74°, and 115.44° at knee flexion of 0°, 30°, 60°, and 90°, respectively. The iPT was strongly associated with the popliteal eminence at 29.5° in Type I and 27.09° in Type II knee flexion. The iPT has been conventionally regarded as a secondary restraint of posterior movement, acting as a stabilizer. However, the iPT appears to work more positively on knee joint stability because it was in strong enough contact to create the popliteal eminence. The iPT supports the femur in the posterolateral region in mild knee flexion.
Identifiants
pubmed: 37979128
doi: 10.1007/s12565-023-00749-z
pii: 10.1007/s12565-023-00749-z
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2023. The Author(s), under exclusive licence to Japanese Association of Anatomists.
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