The malformations of the sacrum which influence the free functioning of the spine go by the name of lumbarisation and sacralisation.1 In human being sacrum is a solid bony mass formed from 5 fused vertebrae in the posterior part of bony pelvis on which the upright spine sits.2 In foetus the segments of the sacrum were not fused, free to move like a tail and participate as an extension of the spine.1,2 Lumbarisation is a condition in which S1 vertebra is not fused& is free to move and participates along with lumbar vertebrae in spinal activity.1,2,3 Sacralisation of lumbar vertebrae is where (L5) segment is fused to the sacrum below.9,10
In the present study examined 50 sacra which are available in the dept. of Anatomy, Nri medical college, mangalgiri for the lumbarisation and sacralisation.