ANALYSIS OF HAND GRIP AMD RELEASE PROCESS BY C15 O2-PET
Wataru Onuki, Hajime Hino, Yoko Dekura, Akira Yamaguchi, Satoru Horikoshi
(National Center of Neurology and Psychitry, Tokyo, Japan.)
[Purpose] To show hand grip and release movements in the early process of recovery of hemiplegics due to brain disorders. Their movements as the primitive motion are regarded as those controlled by the region except the primary motor and sensory cortex.
[Subjects and methods] Serial hand grip and release tasks were given to four cerebral vascular attack (CVA) patients. These tasks were directed at the affected side as well as the sound side of tile patient, lastly approximately 15 minutes. The range of interest (ROI) based regional blood flow (rCBF) were analyzed.
[Results] At the seriar motor tasks in the affected hand, the most increase of rCBF were shown in the primary motor and sensory cortex of the contralateral hemisphere. At the same task in the sound hand, the increase of rCBF were shown in the same cortex of the contralateral hemisphere and in the ipsilateral cerebellum. The volume of the increaseat the motor task changed 40% (max.40ml/100g/min.) compared to that measured while the hand was at rest.
[Conclusion] We concluded that tile activation study of PET is important in making clear the recovery process of the hemiplegia.
MEDIAN NERVE SOMATOSENSORY EVOKED POTENTIALS AS A PREDICTOR OF OUTCOME IN STROKE PATIENTS
Yoon Tae Kim, Sae Yoon Kang, Myung Hoi Koo (Catholic University, Seoul, Korea)
The purpose of this study was to investigate the efficacy of median nerve somatosensory evoked potential (SEP) to predict the outcome in hemiplegic patients with stroke after rehabilitation management.
SEPs were studied in 41 patients (average age, 58 years) before the referral for rehabilitation management an average of 10 days after onset, and in 32 age and sex-matched healthy subjects to establish normal values. The outcome measured by a daily activity index (modified Bathel index) and an evaluation of motor and sensory function of upper extremity was assessed at discharge after rehabilitation management (mean duration, 69 days).
Twenty-five patients (61%) showed an abnormal SEP compared with normal subjects; of these 14 patients (34%) had an absent SEP and showed the worst outcomes. There was a significant correlation between SEP results obtained before rehabilitation management and modified Bathel index, motor, and sensory function of upper extremity at discharge.
Results demonstrate that median nerve SEPs can serve as a useful tool for predicting the outcome in stroke patients after rehabilitation management.