Patent attributes
A method for treating hydrocephalus is provided, including disposing midplane treatment electrodes over a superior sagittal sinus of a brain, outside and in electrical contact with a skull of a head of a subject identified as suffering from hydrocephalus, and disposing lateral treatment electrodes between 1 and 12 cm of a sagittal midplane of the skull. The subject is treated by electroosmotically driving cerebrospinal fluid (CSF) out of a ventricular system of the brain via a subarachnoid space of the brain to the superior sagittal sinus, by activating control circuitry to apply one or more treatment currents between (a) one or more of the midplane treatment electrodes and (b) one or more of the lateral treatment electrodes. Other embodiments are also described.