But another of PotBotics’ endeavors goes a step farther, seeking to interpret marijuana’s benefits from a neurological tack. In a service called BrainBot, a doctor can recommend a patient to receive a series of electroencephalograms (EEGs), recordings of the brain’s electrical activity using electrodes stuck to the scalp, to determine the best strain of pot for his brain. The patient would visit PotBotics’ California facility three to four times, each time taking an inhaler of a specific strain of marijuana while hooked up to the EEG. PotBotics would then send the EEG readings back to the doctor, who would look for changes in certain types of brain waves that are relevant to the patient's medical condition. A doctor might recommend a strain to an insomnia patient, for example, if the results showed less activity of beta waves, which are associated with wakefulness and attention. By using quantifiable evidence, the thought goes, patients would be able to skip the expensive process of purchasing different strains of marijuana from a dispensary before finding the one that best treats a specific medical condition.