Incidence and Morphometric Study of Humeral Septal Aperture in South Indian Population of Karnataka Region

A thin plate of bone usually separates coronoid and olecranon fossa in the distal end of humerus. In some humerii this bony plate is perforated to form an aperture. This present study was conducted on 500 dried adult humerii. The incidence of septal aperture, its shape, transverse diameter and vertical diameter was measured. The septal aperture was found in 31% of humerii. The incidence was more common on left side (37.6%) as compared to right side (24.4%). The aperture was oval and round in shape, of which oval shape was more common. Mean transverse diameter of septal aperture was 4.55±2.39 mm on right side and 5.30±2.72 mm on left side. Mean vertical diameter of septal aperture was 3.29±1.57 mm on right side and 3.87±1.72 mm on left side. Translucency of bony septum was seen in 48.4% of humerii. The anatomical knowledge of septal aperture may be beneficial for anthropologists, orthopedic surgeons and radiologists.