The cause of so-called lumbar disc syndrome are multiple and each cause must be throughly and carefully investigated. The proper treatment may not be successful if one of these factors is ignored. Forty patients with lumbar disc syndrome were examined with a third generation CT scanner(Somatom II) and SEP for 12 months. The findings of CT scan were characterized according to the criteria suggested by Carrera and Hermanus and all results were analized thoroughly. The aim of this article is to underline the importance of the correlative studies between spinal CT and SEP in relation to lumbar disc syndrome.