The increasing use of convulsive therapy in various psychoses and allied disorders makes it necessary for the radiologist to be familiar with the roentgen changes that may be found in the complications associated with this form of treatment. The present study was undertaken in order to evaluate the traumatic complications (fractures) incident to electroshock therapy in a group of patients treated at the McLean Hospital. It is intended to emphasize the ways in which the radiologist can be of the greatest assistance to the psychiatrist and orthopedist. The therapeutic value of the treatment as it applies to the same group will not be discussed since it has been adequately presented elsewhere (8, 9). Since 1935, when Sakel in Vienna first reported insulin shock therapy for psychosis, the value of convulsive treatment has been more and more widely recognized, and the methods of producing shock have been investigated and expanded. Contraindications for and complications from this form of treatment were soon re...