Naohiko Mashiko

STUDIES ON CLINICAL ELECTROMYOGRAPHY (II) ELECTROMYOGRAM OF TONGUE MUSCLES

For the purpose of exploring the function of the medulla oblongata through studying the function of the hypoglossal nerve, electromyograms from tongue muscles were obtained using concentric needle electrodes (monopolar or bipolar) of my own making and cathode‐ray oscilloscope with synchronous loud‐speaker. Furthermore, the function of the accessory nerve was estimated electromyographically from M. trapezius and M. sternocleidomastoideus; and, moreover, the function of the vagal nerve was assessed by observing pharmacodynamic responses.

STUDIES ON CLINICAL ELECTROMYOGRAPHY (I) STUDIES ON THE “FOLLOWER POTENTIAL”

The author found that a muscle which shows electrical silence at rest did not do so immediately after relaxation, but showed chiefly fibrillation voltage for various period of time. This new wave form was named “follower potential” by Prof. Maekawa, and the author observed dynamically its genesis by electromyography. Materials selected were both inpatient and outpatient in Maekawa clinic and other clinics of Kyoto University Hospital. 225 cases with various diseases were examined in a total of 360 times and 1500 needle insertions. In this paper, the author described this special wave form chiefly in N. C. A. and allied diseases. Electromyograms were observed and photograFhed on a cathode‐ray oscilloscope and a simultaneously synchronized loud‐speaker, using a concentric needle electrode of my own design (bipolar and monopolar) and chiefly in continuous sweep. Spinal root segments from cervical to sacral were examined.

A case report of myotonia dystrophica-about its electromyographic study.

A typical case of myotonia dystrophica was studied electromyographically, and interesting findings were obtained.