1. Medullospinal compression due to atlanto-axial dislocation and sudden involvement of pyramidal tracts only. Pathological changes have been reported to occur more frequently in the lateral columns than in the posterior columns in craniovertebral anomalies. 15 The hazards of posterior approach are well haematomyelia during decompression. Pathology, pathogenesis and clinical correlation;Dastur, D.R.; WadiaNH, Desai; AD, Singh; G.;Brain,1965
2. Congenital atlantoaxial dislocation;Singh, G.;Neurology India,1976
3. Transoral decompression and posterior fixation for rheumatoid atlantoaxial Int Surg;Crocard, H.A.; Pazo, J.L.; Ranford, A.O.; Steens, J.M.; Kendell, B.; Essigman, W.K.,1986
4. Evoke potentials in clinical medicine. New Eng documented in atlantoaxial dislocations.247 The deterioration in the neurological status was significantly higher following posterior surgery in patients with basilar invagination;Chippa, K.H.;J Med,1982
5. Evoked potentials in clinical Neurosciences-Review article;Greenberg, R.P.; Ducker, T.B.;J Neurosurg,1982