Variations in the origin of inferior belly of omohyoid muscle

The attachment of the inferior belly of the omohyoid muscle is highly variable. In 58.57% of cases it arises from the scapular notch, in 20% of cases from scapular notch, superior transverse ligament and clavicle, in 5.71% of cases from clavicle only, in 2.85% of cases from coracoclavicular ligament and in 4.28% of cases it is completely absent. The thick muscular inferior belly of omohyoid attached to the clavicle could cause confusion during operatve procedures such as in lymph node biopsy involving minimal exposure

Aortic-common iliac bifurcation, a haemodynamic factor in the genesis of atherosclerosis: a radiographic study

Radiographic study of geometric anatomy of the aortic-common iliac bifurcation in 27 Nigerian male cadavers revealed a mean length of 5.1 cm for right common iliac artery and 5.4 cm for left common iliac artery. The take off angle of the left common iliac [mean 27.2 degrees] is more than that of the fight common iliac artery, [mean 25.2 degrees]. The mean of radius of curvature is greater on the left [3.6 cm] than the right [2.9 cm]. There is a positive correlation [r.= + 0.53] between the length of the left common iliac artery and the radius of curvature of the right common iliac artery whereas negative correlation [r = 0.95] between its length and take off angle and negative correlation [r = -0.64] between length of the right common iliac artery and take off angle of the left common iliac artery. Studies of the geometric radiographic anatomy of the aortic-common iliac bifurcation can be utilized to see whether a person is prone to occlusive vascular disease of the lower extremity even if no lesion is present at the time of investigation