Variation in Morphometry of Vastus Medialis Muscle
Journal Title: Journal of Clinical and Diagnostic Research - Year 2017, Vol 11, Issue 9
Abstract
Introduction: The Vastus Medialis (VM) muscle divides into two parts, proximal Vastus Medialis Longus (VML) and distal Vastus Medialis Obliquus (VMO). The VMO originates from the tendon of adductor magnus and insert into the medial border of patella and these fibers are nearly horizontal. It exerts medial force vector to counter the lateral force vector of Vastus Lateralis (VL) hence the VM presents a biomechanical advantage over the VL. The functional importance of VML and VMO is well explained but the anatomical evidence of separate identity of VMO is lacking. Aim: To determine muscle fiber angles and lengths of VML and VMO, to find out the distinct nerve supply and fascial plane between VML and VMO and to evaluate VM insertion in relation to patella. Materials and Methods: Thirty intact lower limbs (right-15 and left- 15) from 15 donated cadavers with an age 60 years and above were dissected. Lengths and angles of VML, VMO superior (VMOs) and VMO inferior (VMOi) were measured. The fascial plane and the femoral nerve and its branches supplying VM were dissected and terminal branches were traced in each section with the blunt dissection. All parameters were recorded and statistical analysis was done using one-way ANOVA. Results: The VMO took origin from the adductor magnus muscle and attached to the patella. VMOi was present in 83.33% cases (25 limbs), and inserted to the medial border of patella. The percentages of VML, VMOs and VMOi lengths compared to total VM length were 65.54±4.84, 25.23±4.20 and 9.22±2.17 respectively. The fiber angles ranged for VML, VMOs and VMOi were between 18 to 32, 30 to 46 and 46 to 56 degrees respectively. There were significant differences among all groups (p=0.001). These two parts were not separated by distinct fascial plane and no separate nerve supply was observed but the richest nerve supply to VMO was noted. Conclusion: The present study conclude that VMO is having obtuse angle, horizontal fibers and richest nerve supply as compared to proximal part which make it functionally as a separate entity but not anatomically.
Authors and Affiliations
hina b rajput, sangeeta j rajani, vasant h vaniya
Keywords
Related Articles
- EP ID EP362500
- DOI 10.7860/JCDR/2017/29162.10527
- Views 60
- Downloads 0
Ex Vivo Evaluation of the Erosive Potential of Typical Fruit Juices from Brazilian Tropical Forests
ABSTRACT Introduction: Dental erosion is defined as an irreversible loss of hard tissue caused by intrinsic and extrinsic acidic sources, non-bacterial dissolution not directly associated with traumatic factors or tooth...
An Attempt to Make Platelet Rich Fibrin from Bone Marrow Aspirate
Introduction: Platelet Rich Fibrin (PRF) was developed as a new generation of platelet concentration from peripheral blood. Method to make PRF is simple. It is easy to handle with its moderate firmness. Histologically, p...
Assessment of Healthcare Systems Across BRICS Nations, What India Can Learn from the Rest?
ABSTRACT BRICS countries are the five important emerging economies of the world. This article is a situational analysis of the present healthcare system of these countries, their public health expenditure, and the health...
Association of Metabolic Obesity and BMI Status with Severity of Angiographic Coronary Artery Disease in Stable Angina Patients
ABSTRACT Introduction: Obesity and metabolic syndrome frequently co-exist and are one of the major health problems around the globe and its prevalence is 25-30%. In India prevalence of metabolic obesity is ≥30%, among fe...
Bilateral Double Maxillary Paramolars: A Rare Case Report
Paramolars are rare supernumerary molars occurring buccally or lingually/palatally near the molar row. They may cause complications such as caries, periodontal disease and delay or prevention eruption of permanent teeth....