Semimembranosus Gastrocnemius Bursa
Description
Name
- Semimembranosus Gastrocnemius Bursa (Sm-Gb)
- Semimembranosus-gastrocnemius Recess
Anatomy
- One of the many bursae of the knee
- Found in the posteromedial popliteal fossa[3]
- Located between the semimembranosus tendon, medial head of the gastrocnemius muscle
- Cranial to the joint line at the level of the upper medial femoral condyle
1 way valve[4]
- Allows synovial fluid to pass into bursa where it is sequestered
- In flexion, valve is open allowing flow
- In extension, valve is closed due to muscle tension of SemiM and Gastroc
Function
- May provide protective effect against hydraulic pressure from knee effusions[5]
- Size of BC roughly correlates with size of knee effusion[6]
Clinical Significance
See Also
References
- ↑ Hutagalung, Muhammad Bayu Z., Panji Anugerah, and Safrizal Rahman. "The Role of Ultrasonography Exam in Baker’s Cyst: Case Report." The 1st Syiah Kuala International Conference on Medical and Health Sciences. 2017.
- ↑ Image courtesy of https://www.rehabmypatient.com/
- ↑ Fritschy, D., Fasel, J., Imbert, J. C., Bianchi, S., Verdonk, R., & Wirth, C. J. (2006). The popliteal cyst. Knee Surgery, Sports Traumatology, Arthroscopy, 14(7), 623-628.
- ↑ Rauschning W. Anatomy and function of the communication between the knee joint and popliteal bursae. Ann Rheum Dis. 1980;39:354-358.
- ↑ Herman, Alyssa M., and John M. Marzo. "Popliteal cysts: a current review." Orthopedics 37.8 (2014): e678-e684.
- ↑ Hill CL, Gale DG, Chaisson CE, et al. Knee effusions, popliteal cysts, and synovial thickening: association with knee pain in osteoarthritis. J Rheumatol. 2001;28:1330-1337.