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Matsumoto H, Shimizu T, Okabe S, Konoma Y, Hashida H, Ugawa Y, Terao Y, Hanajima R. 21. Cauda equina conduction time in a patient with polyneuropathy, organomegaly, endocrinopathy, M-protein and skin changes (POEMS) syndrome. Clin Neurophysiol 2011. [DOI: 10.1016/j.clinph.2011.01.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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127
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Tsutsumi R, Hanajima R, Hamada M, Shirota Y, Matsumoto H, Terao Y, Ohminami S, Yamakawa Y, Shimada H, Tsuji S, Ugawa Y. PTMS15 Abnormal motor cortex inhibitory circuits in mild cognitive impairment. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60668-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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128
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Terao Y, Fukuda H, Yugeta A, Hikosaka O, Nomura Y, Segawa M, Hanajima R, Tsuji S, Ugawa Y. Initiation and inhibitory control of saccades with the progression of Parkinson's disease – Changes in three major drives converging on the superior colliculus. Neuropsychologia 2011; 49:1794-806. [DOI: 10.1016/j.neuropsychologia.2011.03.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2010] [Revised: 03/01/2011] [Accepted: 03/04/2011] [Indexed: 10/18/2022]
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129
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Shirota Y, Hanajima R, Hamada M, Terao Y, Matsumoto H, Ohminami S, Tsutsumi R, Furubayashi T, Ugawa Y. PTMS17 Inter-individual variation in the efficient stimulation site for magnetic brainstem stimulation. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60670-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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130
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Shinya O, Terao Y, Shirota Y, Tsutsumi R, Goto J, Ichikawa Y, Tsuji S, Ugawa Y, Hanajima R. PTMS25 Long-term effects induced by quadripulse stimulation in Huntington's disease. Clin Neurophysiol 2011. [DOI: 10.1016/s1388-2457(11)60678-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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131
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Matsumoto H, Terao Y, Furubayashi T, Yugeta A, Fukuda H, Emoto M, Hanajima R, Ugawa Y. Small saccades restrict visual scanning area in Parkinson's disease. Mov Disord 2011; 26:1619-26. [DOI: 10.1002/mds.23683] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2010] [Revised: 12/14/2010] [Accepted: 01/24/2011] [Indexed: 11/09/2022] Open
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132
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Hanajima R, Terao Y, Nakatani-Enomoto S, Okabe S, Shirota Y, Oominami S, Matsumoto H, Tsuji S, Ugawa Y. Triad stimulation frequency for cortical facilitation in cortical myoclonus. Mov Disord 2011; 26:685-90. [PMID: 21328618 DOI: 10.1002/mds.23539] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 10/21/2010] [Accepted: 10/25/2010] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Abnormally enhanced cortical rhythmic activities have been reported in patients with cortical myoclonus. We recently reported a new triad-conditioning transcranial magnetic stimulation (TMS) method to detect the intrinsic rhythms of the primary motor cortex (M1). Triad-conditioning TMS revealed a 40-Hz intrinsic rhythm of M1 in normal subjects. In this investigation, we study the motor cortical facilitation induced by rhythmic triple TMS pulses (triad-conditioning TMS) in patients with cortical myoclonus. METHODS Subjects were 7 patients with cortical myoclonus (28-74 years old) and 13 healthy volunteers (30-71 years old). Three conditioning stimuli over M1 at the intensity of 110% active motor threshold preceded the test TMS at various interstimulus intervals corresponding to 10-200 Hz. The resulting amplitudes of conditioned motor evoked potentials recorded from the contralateral hand muscle were compared with those evoked by the test stimulus alone. RESULTS The facilitation at 25 ms (40 Hz) observed in normal subjects was absent in patients with cortical myoclonus. Instead, triad-conditioning TMS induced facilitation at a 40 ms interval (25 Hz) in cortical myoclonus. DISCUSSIONS This change in the timing of facilitation may be explained by a shift of the most preferential intrinsic rhythm of M1, or by some dysfunction in the interneuronal network in cortical myoclonus.
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Nakamura K, Enomoto H, Hanajima R, Hamada M, Shimizu E, Kawamura Y, Sasaki T, Matsuzawa D, Sutoh C, Shirota Y, Terao Y, Ugawa Y. Quadri-pulse stimulation (QPS) induced LTP/LTD was not affected by Val66Met polymorphism in the brain-derived neurotrophic factor (BDNF) gene. Neurosci Lett 2011; 487:264-7. [DOI: 10.1016/j.neulet.2010.10.034] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 10/09/2010] [Accepted: 10/13/2010] [Indexed: 10/18/2022]
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134
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Matsumoto H, Hanajima R, Shirota Y, Hamada M, Terao Y, Ohminami S, Furubayashi T, Nakatani-Enomoto S, Ugawa Y. Cortico-conus motor conduction time (CCCT) for leg muscles. Clin Neurophysiol 2010; 121:1930-3. [DOI: 10.1016/j.clinph.2010.04.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 04/17/2010] [Accepted: 04/19/2010] [Indexed: 11/29/2022]
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135
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Nakatani-Enomoto S, Hanajima R, Hamada M, Terao Y, Matsumoto H, Hirose M, Nakamura K, Furubayashi T, Mochizuki H, Enomoto H, Ugawa Y. P20-23 Bidirectional human sensory cortical excitability modulation by quadripulse magnetic stimulation (QPS) of various cortical areas. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60920-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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136
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Matsumoto H, Hanajima R, Terao Y, Yugeta A, Hamada M, Shirota Y, Ohminami S, Nakatani-Enomoto S, Tsuji S, Ugawa Y. P11-24 Cauda equina conduction time in patients with acquired demyelinating polyneuropathy. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60701-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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137
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Shirota Y, Hamada M, Hanajima R, Terao Y, Matsumoto H, Ohminami S, Furubayashi T, Ugawa Y. P20-7 The effective coil position for magnetic brainstem stimulation. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60904-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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138
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Okano T, Terao Y, Fukuda H, Emoto M, Hanajima R, Takenaka K, Ikeda H, Yatomi Y, Ugawa Y. P1-26 Gaze behavior when observing a ultrasonic diagnostic image. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60439-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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139
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Shirota Y, Hamada M, Hanajima R, Terao Y, Matsumoto H, Ohminami S, Tsuji S, Ugawa Y. Cerebellar dysfunction in progressive supranuclear palsy: A transcranial magnetic stimulation study. Mov Disord 2010; 25:2413-9. [DOI: 10.1002/mds.23298] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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140
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Hamada M, Terao Y, Hanajima R, Okabe S, Matsumoto H, Shirota Y, Ohminami S, Shimizu T, Tanaka N, Tsutsumi R, Ugawa Y. 27. Altered motor cortical plasticity induction by quadripulse stimulation in benign adult familial myoclonic epilepsy. Clin Neurophysiol 2010. [DOI: 10.1016/j.clinph.2010.02.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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141
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Matsumoto L, Hanajima R, Matsumoto H, Ohminami S, Terao Y, Tsuji S, Ugawa Y. Supramaximal responses can be elicited in hand muscles by magnetic stimulation of the cervical motor roots. Brain Stimul 2010; 3:153-60. [DOI: 10.1016/j.brs.2009.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Revised: 09/20/2009] [Accepted: 09/27/2009] [Indexed: 11/30/2022] Open
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142
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Tsutsumi R, Hanajima R, Hamada M, Kowa H, Iwata A, Terao Y, Shirota Y, Matsumoto H, Yugeta A, Tsuji S, Ugawa Y. 58. Interhemispheric inhibition in Alzheimer disease. Clin Neurophysiol 2010. [DOI: 10.1016/j.clinph.2010.02.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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143
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Higashijima U, Terao Y, Ichinomiya T, Miura K, Fukusaki M, Sumikawa K. A comparison of the effect on QT interval between thiamylal and propofol during anaesthetic induction*. Anaesthesia 2010; 65:679-83. [PMID: 20528837 DOI: 10.1111/j.1365-2044.2010.06341.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
SUMMARY The aim of this study was to determine the effect of thiamylal and propofol on heart rate-corrected QT (QTc) interval during anaesthetic induction. We studied 50 patients undergoing lumbar spine surgery. Patients were administered 3 microgxkg(-1) fentanyl and were randomly allocated to receive 5 mgxkg(-1) thiamylal or 1.5 mgxkg(-1) propofol as an induction agent. Tracheal intubation was performed after vecuronium administration. Heart rate, mean arterial pressure, bispectral index score, and 12-lead electrocardiogram were recorded at the following time points: just before (T1) and 2 min after (T2) fentanyl administration; 2 min after anaesthetic administration (T3); 2.5 min after vecuronium injection (T4); and 2 min after intubation (T5). Thiamylal prolonged (p < 0.0001), but propofol shortened (p < 0.0001), the QTc interval.
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Shirota Y, Hamada M, Terao Y, Matsumoto H, Ohminami S, Furubayashi T, Nakatani-Enomoto S, Ugawa Y, Hanajima R. Influence of short-interval intracortical inhibition on short-interval intracortical facilitation in human primary motor cortex. J Neurophysiol 2010; 104:1382-91. [PMID: 20505127 DOI: 10.1152/jn.00164.2010] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Using the paired-pulse paradigm, transcranial magnetic stimulation (TMS) has revealed much about the human primary motor cortex (M1). A preceding subthreshold conditioning stimulus (CS) inhibits the excitability of the motor cortex, which is named short-interval intracortical inhibition (SICI). In contrast, facilitation is observed when the first pulse (S1) is followed by a second one at threshold (S2), named short-interval intracortical facilitation (SICF). SICI and SICF have been considered to be mediated by different neural circuits within M1, but more recent studies reported relations between them. In this study, we performed triple-pulse stimulation consisting of CS-S1-S2 to further explore putative interactions between these two effects. Three intensities of CS (80-120% of active motor threshold: AMT) and two intensities of S2 (120 and 140% AMT) were combined. The SICF in the paired-pulse paradigm exhibited clear facilitatory peaks at ISIs of 1.5 and 3 ms. The second peak at 3 ms was significantly suppressed by triple-pulse stimulation using 120% AMT CS, although the first peak was almost unaffected. Our present results obtained using triple-pulse stimulation suggest that each peak of SICF is differently modulated by different intensities of CS. The suppression of the second peak might be ascribed to the findings in the paired-pulse paradigm that CS mediates SICI by inhibiting later I waves such as I3 waves and that the second peak of SICF is most probably related to I3 waves. We propose that CS might inhibit the second peak of SICF at the interneurons responsible for I3 waves.
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Yugeta A, Terao Y, Fukuda H, Hikosaka O, Yokochi F, Okiyama R, Taniguchi M, Takahashi H, Hamada I, Hanajima R, Ugawa Y. Effects of STN stimulation on the initiation and inhibition of saccade in Parkinson disease. Neurology 2010; 74:743-8. [PMID: 20194913 DOI: 10.1212/wnl.0b013e3181d31e0b] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES The basal ganglia (BG) play an important role in controlling saccades. Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is widely used as a treatment of Parkinson disease (PD) by altering the function of the BG. Nevertheless, the effects of STN DBS on saccade performance are not fully clarified in a systematic manner. In this study, we examined the effects of bilateral STN DBS on both the initiation and inhibition of saccades in PD. METHODS Thirty-two patients with PD performed 4 oculomotor tasks. Two tasks (visually guided saccades and gap saccades) were reflexive and 2 (memory-guided saccades [MGS] and antisaccades) were volitional. While taking their regular doses of antiparkinsonian drugs, patients performed these tasks under 2 conditions: during DBS (DBS-on condition) and without DBS (DBS-off condition). Fifty-one age-matched subjects served as controls. RESULTS In the DBS-on condition, parameters of saccade initiation were improved in all tasks, with shorter latencies and increased amplitudes, except for MGS latency. STN DBS improved the ability to suppress unwanted saccades to the cue stimulus in the MGS task. However, it did not suppress prosaccades during the antisaccade task. CONCLUSIONS These results suggest that deep brain stimulation (DBS) of the subthalamic nucleus (STN) affects the neural pathway common to both reflexive and volitional saccades, possibly by acting on the STN-substantia nigra pars reticulata-superior colliculi pathway. STN DBS may set the functional level of the superior colliculi appropriate for both saccade initiation and inhibition through this pathway. These findings provide novel insights into the pathophysiology of Parkinson disease and may yield better treatment strategies.
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Okano T, Terao Y, Furubayashi T, Yugeta A, Hanajima R, Ugawa Y. The effect of electromagnetic field emitted by a mobile phone on the inhibitory control of saccades. Clin Neurophysiol 2010; 121:603-11. [DOI: 10.1016/j.clinph.2009.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 11/09/2009] [Accepted: 12/07/2009] [Indexed: 11/25/2022]
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147
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Matsumoto H, Hanajima R, Terao Y, Yugeta A, Hamada M, Shirota Y, Ohminami S, Nakatani-Enomoto S, Tsuji S, Ugawa Y. Prominent cauda equina involvement in patients with chronic inflammatory demyelinating polyradiculoneuropathy. J Neurol Sci 2010; 290:112-4. [DOI: 10.1016/j.jns.2009.10.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Accepted: 10/13/2009] [Indexed: 11/16/2022]
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148
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Sato K, Aoki S, Iwata NK, Masutani Y, Watadani T, Nakata Y, Yoshida M, Terao Y, Abe O, Ohtomo K, Tsuji S. Diffusion tensor tract-specific analysis of the uncinate fasciculus in patients with amyotrophic lateral sclerosis. Neuroradiology 2010; 52:729-33. [DOI: 10.1007/s00234-010-0653-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2009] [Accepted: 01/02/2010] [Indexed: 10/19/2022]
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149
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Matsumoto H, Hanajima R, Terao Y, Hamada M, Yugeta A, Shirota Y, Yuasa K, Sato F, Matsukawa T, Takahashi Y, Goto J, Tsuji S, Ugawa Y. Efferent and afferent evoked potentials in patients with adrenomyeloneuropathy. Clin Neurol Neurosurg 2010; 112:131-6. [DOI: 10.1016/j.clineuro.2009.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 11/04/2009] [Accepted: 11/06/2009] [Indexed: 12/13/2022]
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150
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Hanajima R, Terao Y, Nakatani-Enomoto S, Hamada M, Yugeta A, Matsumoto H, Yamamoto T, Tsuji S, Ugawa Y. Postural tremor in X-linked spinal and bulbar muscular atrophy. Mov Disord 2010; 24:2063-9. [PMID: 19746452 DOI: 10.1002/mds.22566] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Postural tremor is a common initial symptom in spinal and bulbar muscular atrophy (SBMA), but its pathophysiological mechanisms remain to be studied. This study was undertaken to examine the physiological mechanisms underlying postural tremor in SBMA. For eight patients (36-63 years old) with genetically confirmed SBMA, we recorded surface electromyograms (EMGs) from the forearm muscles and hand movements with an accelerometer (ACC) while maintaining a posture with and without a weight load. We then analyzed their power spectra and coherence. The peak tremor frequency was 6-9 Hz in seven patients and 2-3 Hz in one patient. Oscillatory movements were associated with EMG activity in five patients, but not in three patients. Weight loads and postural changes affected the tremor frequency in all patients. Tremor was classified as "reflex tremor" in five patients and "mechanical tremor" in three patients. These results suggest that peripheral factors play important roles in tremor genesis in SBMA, although its clinical features resemble essential tremor. Subclinical sensory disturbance or a decrease of motor unit numbers might be candidates for such peripheral factors contributing to tremor genesis in SBMA.
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