Selective effects of repetition rate on frontal and parietal somatosensory evoked potentials (SEPs)
- PMID: 2289423
- DOI: 10.1016/b978-0-444-81352-7.50018-2
Selective effects of repetition rate on frontal and parietal somatosensory evoked potentials (SEPs)
Abstract
The effects of changing the stimulus presentation rate on early parietal (N20-P25) and frontal (P22-N30) somatosensory potentials (SEPs), evoked by median nerve stimulation, were investigated in 15 normal subjects. Stimuli were presented at 0.1, 0.4, 1.0, 4.0 and 10/sec. Only minor latency changes, mainly for the frontal P22 component, were observed when the stimulus rate was increased up to 10/sec: while the frontal P22-N30 complex was more rapidly and severely reduced in amplitude than the parietal N20-P25 complex. The differential effects of stimulus presentation rate on early frontal and parietal SEPs support the hypothesis of separate neural generators and suggest that the choice of the stimulation frequency may be critical for the interpretation of diagnostic SEP studies.
Similar articles
-
The effect of stimulus frequency on post- and pre-central short-latency somatosensory evoked potentials (SEPs).Electroencephalogr Clin Neurophysiol. 1990 Mar-Apr;77(2):86-92. doi: 10.1016/0168-5597(90)90021-5. Electroencephalogr Clin Neurophysiol. 1990. PMID: 1690120
-
Are frontal and parietal somatosensory evoked potentials functionally dissociated by changing stimulus rate?Int J Neurosci. 1994 Oct;78(3-4):207-13. doi: 10.3109/00207459408986059. Int J Neurosci. 1994. PMID: 7883457
-
Astereognosis and dissociated loss of frontal or parietal components of somatosensory evoked potentials in hemispheric lesions. Detailed correlations with clinical signs and computerized tomographic scanning.Brain. 1983 Jun;106 (Pt 2):271-311. doi: 10.1093/brain/106.2.271. Brain. 1983. PMID: 6850271
-
Potentials evoked in human and monkey cerebral cortex by stimulation of the median nerve. A review of scalp and intracranial recordings.Brain. 1991 Dec;114 ( Pt 6):2465-503. doi: 10.1093/brain/114.6.2465. Brain. 1991. PMID: 1782527 Review.
-
Loss of parietal and frontal somatosensory evoked potentials in hemispheric deafferentation.Electroencephalogr Clin Neurophysiol Suppl. 1990;41:274-85. doi: 10.1016/b978-0-444-81352-7.50032-7. Electroencephalogr Clin Neurophysiol Suppl. 1990. PMID: 2289438 Review. No abstract available.