The "temporalis-inhibitory reflex" in post-lumbar puncture headache.

Nausea and rigidity of the neck muscles, typical symptoms of post-lumbar puncture syndrome (PPS), may also be found in patients suffering from chronic headache of the tension-type. A decreased duration of the late suppression period of temporal muscle activity indicating a central disturbance of pericranial muscle control, can be observed in these patients. We have studied the temporalis-inhibitory reflex in 47 neurological inpatients requiring lumbar puncture. There were no significant differences of latencies or durations of temporalis silent periods between patients with and without PPS before, and 48 h following, lumbar puncture.