“…96,97 In human studies, no gross behavioral changes, neurological alterations, or seizure activity at any time after the procedure has been reported. 5,6,109,120 Symptoms, such as postural post-lumbar puncture headache, nausea, and episodes of vomiting, were documented, but all resolved within the first 24 hours of the lumbar puncture with conservative bed rest. 109 In a prospective pilot trial in 20 patients, Aydin and colleagues 5 used a total volume of 0.5-1.0 ml of intrathecal contrast medium without any significant gross neurological, CSF, electroencephalography, or MRI changes related to the medium on the initial follow-up examination.…”