P-2-01-15
QUANTIFIED EEG AS A VARIABLE REFLECTING THE FUNCTIONAL STATE AFTER STROKE
K. Seki, K. Yoshida, G.Imada, N.Ohi, K. Suzuki and T. Iwaya (Tohoku University, Sendai, Japan)
Purpose: We examined quantified EEG in each hemisphere in stroke patients with hemisphenc lesion to investigate whether it could be a variable reflecting functional state after stroke.
Methods: Sixty-one hemiparetic stroke patients who received medical rehabilitation during admission were enrolled in this study. Before start of medical rehabilitation brain electrical activity mapping was performed on those patients and mean alpha-band power (MABP) was calculated in the injured hemisphere (IH) and the non-injured hemisphere (NIH) respectively. Functional states of the patients were measured by Mini-Mental State, Manual Function Score, Motor Age Test for trunk and lower extremities, Barthel Index and Maximum Walking Speed for 10m distance before and 4weeks after the rehabilitation.
Results: According to the laterality of MABP in IH and NIH revealed by paired-t test, the patients were divided into three groups; the patients with higher MABP in IH than NIH (IH(+)), those with lower MABP in IH than NIH (IH(-)) and those without laterality (lat.(-)). In both of the functional evaluations performed before and 4weeks after the rehabilitation, IH(+) and lat.(-) showed significantly higher scores in all of the functional states than IH(-).
Conclusion: The results suggest that the laterality of MABP in IH and NIH relates to the functional state in the hemiparetic stroke patients and the patients with lower MABP in IH show poor prognosis in physical and mental function.
P-2-01-16
Motor evoked potential of trunkal muscles and righting reaction time of trunkal muscles against seat displacement
Seiji Etoh, Satoru Matayoshi, Kazumi Kawahira, Nobuyuki Tanaka (Department of Rehabilitation and Physical Medicine, Fuculty of Medicine, Kagoshima University, Kagoshima, Japan)
<purpose> To investigate the function of trunkal muscles of stroke patients, motor evoked potential (MEP) from abdominal muscles by transcranial magnetic stimulation (TMS), and the righting reaction time of trunkal muscles were measured by displacing the seat chair rapidly (0.3sec) to contra- or ipsi-lateral side for 30cm.
<subjects and methods> Subjects were 7 stroke patients and 5 normal volunteers. MEP by TMS was recorded from rectus abdominis under voluntary muscle contraction. Reaction time against rapid seat displacement was measured by electromyogram of trunkal muscles.
<result> In normal subjects, there were no differeces in MEP amplitude between r- and l-abdominal muscles. In stroke patients, MEP amplitude of the affected side was lower than that of unaffected side. In 6 stroke patients with hemiplegia, righting reaction time of affected side was longer than that of unaffected side.
<conclusion> MEP recorded from trunkal muscles and righting reaction time of trunkal muscles against seat displacement is useful to evaluate the function of trunkal muscles of stroke patients.
