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Features of the Femoral Proximocaudal Joint Capsule Insertion Among Canids
Dennis Lawler1,2,3, Basil Tangredi2,4,5, Jerry Owens6
1Center for American Archaeology, Kampsville, Illinois.
Anatomical Record (Hoboken, N.J. : 2007)
|August 22, 2019
Summary
This study reveals a consistent spatial relationship between the femoral joint capsule insertion and the caudolateral curvilinear osteophyte (CCO) in canids. This finding suggests both are linked pathological features across species.
Area of Science:
- Veterinary Anatomy
- Comparative Pathology
- Paleontology
Background:
- The caudolateral curvilinear osteophyte (CCO) is a recognized feature in canid femora.
- The relationship between the CCO and the femoral joint capsule insertion has not been previously characterized.
- Understanding this relationship is crucial for diagnosing pathologies in the canid coxofemoral joint.
Purpose of the Study:
- To investigate the anatomic relationship between the proximocaudal femoral joint capsule insertion and the CCO.
- To determine if this relationship is species-specific or conserved across canids.
- To assess the pathological significance of the observed association.
Main Methods:
- Observational study of museum specimens of proximal femora from ancient and modern domestic and non-domestic canids.
- Screening of 267 dry bone specimens for remnant enthesophytes of the caudal joint capsule insertion and CCO.
- Analysis of spatial relationships in 19 specimens meeting inclusion criteria.
Main Results:
- A consistent, species-independent spatial relationship was identified between the femoral joint capsule insertion and the CCO.
- Femoral joint capsule insertion enthesophytes, associated with inflammation, were less frequent than CCO.
- The CCO was more frequently identified by direct inspection than radiography.
Conclusions:
- The anatomic association between the CCO and joint capsule insertion is nonspecific and species-independent.
- Both the CCO and joint capsule insertion appear to be pathological features.
- Further research is needed to characterize canid coxofemoral joint pathology phylogenetically.
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