Quadrate tubercle

Tubercle

Quadrate tubercle
Right femur. Posterior surface. (Quadratus femoris labeled.)
Right femur. Posterior surface. (Quadratus femoris labeled at top center.)
Details
Identifiers
Latin	tuberculum quadratum
TA98	A02.5.04.011
TA2	1370
FMA	43709
Anatomical terms of bone [edit on Wikidata]

The quadrate tubercle is a small tubercle found upon the upper part of the femur. It serves as a point of insertion of the quadratus femoris muscle, along with the intertrochanteric crest and the linea quadrata.

Structure

The quadrate tubercle is located about the junction of the upper one-third and lower two-thirds, on the intertrochanteric crest. In a small anatomical study, it was shown that the epiphysial line passes directly through the quadrate tubercle.^[1] The quadrate tubercle is the site of insertion of the quadratus femoris muscle.^[2]

Variation

The size of the quadrate tubercle varies. It is not always located on the intertrochanteric crest. Adjacent areas can also be part of the quadrate tubercle, such as the posterior surface of the greater trochanter or the neck of the femur.

Additional images

Right femur. Posterior surface. (Quadratus femoris and Quadrate tubercle labeled.)

References

^ Sunderland S (January 1938). "The Quadrate Tubercle of the Femur". J. Anat. 72 (Pt 2): 309–12. PMC 1252427. PMID 17104699.
^ Li, Jianto; Tang, Shaojie; Zhang, Hao; Li, Zhirui; Deng, Wanyu; Zhao, Chen; Fan, Lianghui; Wang, Guoqi; Liu, Jianheng; Yin, Peng; Xu, Gaoxiang (April 2019). "Clustering of morphological fracture lines for identifying intertrochanteric fracture classification with Hausdorff distance–based K-means approach". Injury. 50 (4): 939–949. doi:10.1016/j.injury.2019.03.032. PMID 31003702. S2CID 88082221 – via Elsevier.

Bones of the human leg

Femur

upper extremity	head fovea neck greater trochanter fossa lesser trochanter intertrochanteric line intertrochanteric crest quadrate tubercle
shaft	linea aspera upper medial: merges with intertrochanteric line upper intermediate: pectineal line upper lateral: gluteal tuberosity / third trochanter
lower extremity	adductor tubercle patellar surface epicondyles lateral medial condyles lateral medial intercondylar fossa

Tibia

upper extremity	Gerdy's tubercle condyles lateral medial intercondylar area
shaft	tuberosity soleal line
lower extremity	medial malleolus Anterior colliculus Posterior colliculus fibular notch

Fibula

lateral malleolus

Other

patella
- apex

Foot

Tarsus	calcaneus sustentaculum tali calcaneal tubercle talus navicular cuboid cuneiform medial intermediate lateral
Metatarsals	1st 2nd 3rd 4th 5th
Other	Phalanges