F-Wave in the Upper Extremities of Patients with Primary Torsion Dystonia
We investigated characteristics of the F-waves in the upper limbs of patients suffering from primary torsion dystonia (PTD) by means of surface-electrode electromyography. Single electric stimulation was used to obtain optimum M-responses from the m. abductor pollicis brevis (median nerve) and m....
Збережено в:
Видавець: | Інститут фізіології ім. О.О. Богомольця НАН України |
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Дата: | 2015 |
Автори: | , , , |
Формат: | Стаття |
Мова: | English |
Опубліковано: |
Інститут фізіології ім. О.О. Богомольця НАН України
2015
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Назва видання: | Нейрофизиология |
Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/148194 |
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Цитувати: | F-Wave in the Upper Extremities of Patients with Primary Torsion Dystonia / N. Semerdjieva, D. Atanasova, G. Hranov, I. Milanov // Нейрофизиология. — 2015. — Т. 47, № 3. — С. 291-294. — Бібліогр.: 16 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of UkraineРезюме: | We investigated characteristics of the F-waves in the upper limbs of patients suffering
from primary torsion dystonia (PTD) by means of surface-electrode electromyography.
Single electric stimulation was used to obtain optimum M-responses from the m. abductor
pollicis brevis (median nerve) and m. abductor digiti minimi (ulnar nerve). Ten consecutive
supramaximum electrical stimuli were applied to each nerve to obtain F-waves from the
wrist. In general, the registered M-response latencies and amplitudes, as well as conduction
velocities via all inspected nerves, demonstrated no significant deviations from the normal
ranges. Nearly all investigated patients, except one, had normal F-wave minimal latencies.
The mean amplitudes of F-waves from both median and ulnar nerves were higher than the
average F-wave amplitudes described in the literature. The frequency of occurrence of
F-waves in both median and ulnar nerves was greater than in the norm. According to our
results, it can be concluded that the amplitude and, to some extent, frequency rather than the
latency of F-waves are important in the studies of patients with PTD. Increased amplitudes
and frequencies reveal changes in the excitability of alpha motoneurons, which could be
accepted as a measure of a disturbed interneuronal balance probably caused by alterations in
the suprasegmental control mechanisms related to PTD. |
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