The effects of putaminal hemorrhage upon motoneuron excitability.
To evaluate the putaminal influence on spinal motoneuron excitability, H-reflex recovery curve (HRRC) was studied in 24 patients with putaminal hemorrhage. Thirteen patients had increased facilitation, most significantly between 150 msec and 300 msec after the conditioning stimulus. It is proposed that putaminal dysfunction may cause an impairment in inhibition of soleus motoneuron excitability. Such a putaminal disinhibition is probably related to a disturbance of the thalamo-striatal and thalamic fasciculus circuits.
Department of Neurology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, R.O.C.
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002543:Cerebral Hemorrhage / Q000503:physiopathology*; D005260:Female; D006181:H-Reflex; D006801:Humans; D008297:Male; D008875:Middle Aged; D009046:Motor Neurons / Q000502:physiology*; D011699:Putamen