Respiration-linked 'limbic spindles': vibration artifact recorded from nasopharyngeal and intracerebral electrodes

Respiration-linked 20-40 c/sec spindles were recorded simultaneously from nasopharyngeal, sphenoidal and limbic depth electrodes in 10 patients under evaluation for temporal lobectomy. In addition, a piezo-electrode at the tip of one nasopharyngeal electrode recorded vibration from the nasopharynx in 3 patients. Results demonstrated that respiration-linked 20-40 c/sec spindles recorded from nasopharyngeal and sphenoidal electrodes are vibration artifact. In addition, similar vibration artifact also occurred in the limbic depth, indicating that at least some respiration-linked intracerebrally recorded limbic spindles also are not of neuronal origin.