Article révisé par les pairs
Résumé : The alms of this study were 1) to compare discography And magnetic resonance imaging scanning on cadavar specimens and to correlate these imaging procedures ' by examining all the discs histologically; and 2) to study the extent to which the amplitude of rotational movement in the neutral and flexed position et a certain level correlates with the morph ologic appearance of lhal disc. Twenty-four human lumbar spines were harvested from cadavers between the ages of 19 and 76 years. Each specimen underwent standard radiography, magnetic resonance imaging scanning, discogrBphy, histologic examination, and measurement of axial rotation In a torsion apparatus. For practical reasons, all specimens did not undergo all of the examinations. Not all peripheral anular lesions were detected by diBcography. Histology showed rim lesions of the anterior anulus in te% of discs with normal discography. The overall incidence of anterior and posterior anular tears was greater in discs where larger amplitudes of rotation were observed, To which extent the one is a consequence of the other or vice versa is not clear. Magnetic resonance imaging was found to be less specific than discography. However, it must be emphasized that no axial magnetic rosemaries imaging scans were taken in this study. Discs with significHntly decreased amounts of nuclear material (observed at histology! can still produce normal mfignstic resonance imaging Images. Infolding of the inner layers of the anulus flbrosus 33% anterior, 4% posterior) was a frequently observed feature. © Lippincott-Raven Publishers.

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