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. 1985;232(4):246-9.
doi: 10.1007/BF00313788.

Assessment of motor neuron excitability in parkinsonian rigidity by the F wave

G Abbruzzese, M Vische, S Ratto, M Abbruzzese, E Favale

Assessment of motor neuron excitability in parkinsonian rigidity by the F wave

G Abbruzzese et al. J Neurol. 1985.

Abstract

F-wave responses from abductor pollicis brevis muscle occurred more frequently, with a larger amplitude and longer duration in rigid parkinsonian patients than in age-matched normal controls. F-wave potentiation during voluntary contraction was impaired in parkinsonian patients. These findings suggest that spinal motor neuron excitability is enhanced in rigidity. F-wave amplitude was significantly correlated to the clinical evaluation of motor disability, so that the F wave may be regarded as a useful approach to quantitative evaluation of rigidity.

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