Modifications on Dorsum of Neck of Talus (Squatting Facets and Trochlear Extensions) in Indians

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Acta Medica International,2015,2,1,100-104.
Published:January 2015
Type:Original Article

Modifications on Dorsum of Neck of Talus (Squatting Facets and Trochlear Extensions) in Indians

Rohin Garg1, Sushila Shekhawat2, Khushboo Mogra3, Santosh Kumar4
 

1Assistant Professor, Department of Anatomy, Teerthanker Mahaveer Medical College & Research Centre, Moradabad, Uttar Pradesh, India,
2Senior Demonstrator, Department of Anatomy, JLN Medical College, Ajmer, Rajasthan, India,

3Assistant Professor, Department of Anatomy, National Institute of Medical Sciences, Jaipur, Rajasthan, India,

4Senior Lecturer, Department of Anatomy, Jaipur Dental College, Jaipur, Rajasthan, India

Abstract:

Objective: Habitual squatting in humans is associated with modifications of ankle especially the neck of the talus (squatting facets) and its trochlear surface (trochlear extensions) that characterize the strong pressure and traction forces on ankle joints in state of hyperdorsifl exion. Present study was done to find out variations and incidences of various types of modifications of neck of talus thoroughly and to determine regional peculiarities of these modifications in Indians. Material and Methods: 300 dry (150 right and 150 left) adult tali were taken for present study. Each talus was examined for the presence of various patterns of articular facets on neck of talus and extensions of its trochlear surface. Statistical analysis of data was performed by using Fisher exact test with 95% confidence limits. Results: Lateral squatting facet was found in 136 tali (45.3%). Incidences of medial, combined & continuous gutter like squatting facets were 7.7%, 3.3% & 4.3% respectively. Lateral and medial extensions of trochlear surface were found in 22.3% and 23.7% respectively. Conclusions: Modifi cations of the neck of talus (squatting facets and trochlear extensions) are result of prolonged squatting positions which is common habit of Indian population and incidences of these variations can be used as an anthropological marker for racial and regional differentiation of unidentified bones.

Medial (MSF) and lateral (LSF) Squatting facets on dorsum of neck of talus Figure