Recording cutaneous silent period parameters in hereditary and acquired neuropathies

Abstract Background  Cutaneous silent period (CSP) is the interruption in muscle activity after painful stimulation of a sensory nerve. Objective  The aim of the present study is to assess CSP changes in patients with polyneuropathy (PNP). Methods  The present study was carried out to assess CSP in...

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Veröffentlicht in:Arquivos de neuro-psiquiatria 2022-08, Vol.80 (8), p.831-836
Hauptverfasser: Neves, Eduardo Luis de A., Silva, José Rodrigo S.
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Sprache:eng
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Zusammenfassung:Abstract Background  Cutaneous silent period (CSP) is the interruption in muscle activity after painful stimulation of a sensory nerve. Objective  The aim of the present study is to assess CSP changes in patients with polyneuropathy (PNP). Methods  The present study was carried out to assess CSP in individuals with diabetes (DM) and Charcot-Marie-Tooth (CMT) disease. The sample comprised 24 individuals with DM, 10 individuals with CMT1 disease, and 10 individuals with CMT2 disease. The control group (CG) consisted of 59 individuals. Results  The mean latencies recorded for the upper limbs in the CG were 79.2 milliseconds (onset latency), 69.3 milliseconds (50% reduction latency), 112.2 milliseconds (end latency), and 33.1 milliseconds (CSP duration). On the other hand, the mean latencies recorded for the lower limbs were 99.0 milliseconds (onset latency), 85.0 milliseconds (50% reduction latency), 136.9 milliseconds (end latency), and 38.2 milliseconds (CSP duration). The mean latencies recorded for the CG were significantly lower than the ones recorded for other groups, both in the upper and lower limbs. Conclusions  Cutaneous silent period values recorded for the CG in the present study were close to the ones reported in studies available in the literature. Abnormal CSP parameters were observed in the group of individuals with PNP. The end latency in the lower limbs helped differentiating the demyelinating subgroup from the axonal one.
ISSN:0004-282X
1678-4227
1678-4227
DOI:10.1055/s-0042-1755229