It is important to know the prognosis of the cerebrovascular disease for plan of the course of rehabilitation program. Up to present, brain computerized tomogram(brain CT) was used in combination with clinical, personal and environmental factors but they are insufficient and have a lot of limitation to expect the neurophysiologic state and the prognosis of the hemiplegic patients. And so we practiced the median nerve somatosensory evoked potentials(SEP) as a prognostic predictor of the cerebrovascular disease on the both upper extremities and evaluated correlation with the clinical findings and brain CT and then correlated with the functional recovery in 40 hemiplegic patients.
Results
are following.

1) SEP has a good correlation with clinical findings and among them especially strong with vibration and joint position sense.

2) In the lesion of the somatosensory pathway and basal ganglia, loss of the SEP waveform was marked and in the lesion of non-somatosensory area except basal ganglia SEP showed normal or mild change.

3) Changes of the SEP waveform according to the duration of disease were not significant and have no correlation.

4) Motor & sensory improvements in hemiplegic patients had something to do with the improvement implicated still more.

5) We think that it is desirable to exam the SEP as a simple neurodiagnostic study for the appreciation of neurophysiologic state and the prognostic prediction of the functional recovery during acute stage and rehabilitation period in the stroke patients.