slow brain stem auditory evoked potentials ( baep ) were recorded in humans from depth electrodes in the thalamus and from movable electrodes within the ivth ventricle ( the vicinity of the pons ) , the aqueduct of sylvius ( the midbrain ) , the iiird ventricle ( the thalamus ) and the lateral ventricle .
C0007769
aqueduct of sylvius
C0025462
midbrain