Word: electroencephalographers
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Brain Waves. Chief of the Institute's brain-wave station is young, German-born Dr. Paul Frederick Adam Hoefer, who came from Boston with Dr. Putnam. Close kin to a sensitive short-wave radio is the electroencephalograph. Tiny lead electrodes are pasted to the patient's scalp. From the electrodes fine, threadlike wires lead to the machine which detects, through scalp and skull, faint electric brain impulses. A connected drum and ink recorder charts patterns. Normal frequency is ten shallow, rippling, regular waves a second. Abnormal brain waves, often running to 25 a second, show up as irregular...