Auditory effects on the motor responses after magnetic cortical stimulation and on the H-reflexes in patients with Parkinson's disease.
The effects of sound on the responses in teh abductor pollicis brevis muscle after magnetic cortical stimulation and on the H-reflexes in the wrist and finger flexor muscles were examined. Magnetic cortical stimulation and electrical stimulation eliciting H-reflexes were conditioned by sound stimulation. This sound stimulation did not produce the electromyographic response by itself. In the control subjects, sound stimulation produced an increase of the motor responses after cortical stimulation at intervals of 100, 150, 200 and 250 ms. The increase was greater in the patients with Parkinson's disease (PD). In the control subjects, sound stimulation produced an increase of the H-reflexes at intervals of 50, 100, 150 and 200 ms. This H-reflex increase in the PD patients was less than in the normal subjects. The reticular system might play a role in the abnormal motor control system in PD patients.
Nakashima
K
K
Division of Neurology, Faculty of Medicine, Tottori University, Yonago, Japan.
Wang
Y
Y
Shimoda
M
M
Shimoyama
R
R
Yokoyama
Y
Y
Takahashi
K
K
D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D002540:Cerebral Cortex / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology; D004558:Electric Stimulation; D055590:Electromagnetic Phenomena; D004576:Electromyography; D005260:Female; D006181:H-Reflex / Q000502:physiology*; D006801:Humans; D008297:Male; D008475:Median Nerve / Q000502:physiology; D008875:Middle Aged; D009044:Motor Cortex / Q000502:physiology; D009068:Movement / Q000502:physiology*; D009132:Muscles / Q000294:innervation / Q000502:physiology; D010300:Parkinson Disease / Q000503:physiopathology*; D012154:Reticular Formation / Q000502:physiology