Proposal of a new criterion for electrodiagnosis of meralgia paresthetica by evoked potentials.
J Clin Neurophysiol
; 23(5): 482-5, 2006 Oct.
Article
em En
| MEDLINE
| ID: mdl-17016161
ABSTRACT
We examined 19 subjects with meralgia paresthetica (bilateral in three cases), recording bilateral somatosensory-evoked potentials (SSEPs) after stimulation of the tibial posterior nerve (TPN) and cutaneous stimulation in the region of the lateral femoral cutaneous nerve (LFCN). We calculated the difference between TPN SSEPs and LFCN SSEPs cortical potentials, identifying a temporal parameter that we termed D(SEP). We defined D(SEP) normal values in a control group. D(SEP) evaluation showed good sensitivity and specificity (85.7% and 82.4%, respectively; accuracy, 83.3%) in discriminating affected limbs from unaffected. The main advantage of this method is to disengage from the necessity of contralateral comparison of LFCN recordings, joined with a reduction of interindividual variability of LFCN SSEPs amplitude and latency that often causes a lower sensitivity of other methods. As an interesting consideration, D(SEP) evaluation appears to mark out a possible subclinical involvement of LFCN in the asymptomatic side of patients with meralgia paresthetica.
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Base de dados:
MEDLINE
Assunto principal:
Parestesia
/
Neuropatia Femoral
/
Eletrodiagnóstico
/
Potenciais Somatossensoriais Evocados
/
Síndromes de Compressão Nervosa
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article