This electrode is used initially to stimulate areas near the target to be certain that the proposed target is not too near motor or visual pathways. Finally, after testing is completed a radiofrequency current is used to coagulate the target site. This is not felt by the patient since the brain is not pain-sensitive. Neurological testing is continued during the lesioning to be certain that no unwanted neurological deficits are developing. The lesion generator gives a continuous read-out of elapsed time and temperature at the tip of the electrode so that the lesion size is accurately controlled.
Patients often notice alleviation of rigidity, bradykinesia, and tremor during lesioning.
These will subside in several days. They then transfer to regular rooms, and usually are discharged home on the third postoperative day. After that, the movement disorder neurologists resume care of the patient. The pulse generator is programmed to transmit pulses of a specified frequency and amplitude to the electrode. Thalamotomy remains effective for intention tremor due to multiple sclerosis, trauma, or stroke.