Long latency somatosensory evoked potentials

Colon, E. J.; Comı, Gıancarlo

doi:10.1007/978-94-009-2059-0_8

Cited by 4 publications

(7 citation statements)

References 70 publications

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“…Unlike previous studies targeting LL-SSEPs at the scalp (the somatosensory cortex) and the cortical level (motor cortex) [8, 9, 10, 12, 31, 32, 33], we focused on subcortical structures, namely the STN of PD patients.…”

Section: Discussionmentioning

confidence: 99%

“…N140-N260-P200-P300-P420-N360-N460, where N140-P200 is maximum over the vertex and the remaining components over the posterior regions [10]. Relevant LL-SSEP components in the range 40–250 ms include, P45, N60 and P100 with the cortical pericentral P50 and the pre- and post-central derived N80-P80 with corresponding generator as the contralateral area 3b of the somatosensory cortex [32].…”

Section: Discussionmentioning

confidence: 99%

“…On the one hand, SL-SSEPs possess latencies ranging from 11 ms to approximately 40 ms. SL-SSEPs have been studied at the scalp, the cortical and the subcortical level and shown to be stable under anesthesia effects [7]. Moreover, these potentials are commonly used in clinical procedures including diagnosis of lesions in the white matter of the brain (especially the primary somatosensory cortex), the spinal cord and for intraoperative monitoring [10]. On the other hand, LL-SSEPs possess latencies greater or equal to 40 ms. LL-SSEPs have been addressed at the scalp and the cortical level but not at the subcortical level.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies focusing on LL-SSEPs at the scalp and the cortical level (intracranial) reported about complexes such as P45-N60 over the contralateral somatosensory cortex, N30-P65-N70 over the frontal cortex, a bilateral frontal complex P80-P100 followed by the complex N140-N260-P200-P300-P420-N360-N460, including LL-SSEP components such as P45, N60, P100 with the cortical peri-central P50 and the pre- and post-central derived N80-P80 with corresponding generator as the contralateral area 3b of the somatosensory cortex [8, 9, 10, 11, 12]. In addition, negative components around 65 ms or 77.9 ms as well as positive components around 94 ms or 111.2 ms have been recorded by using intracortical electrodes stereotactically implanted in the anterior subdivision of supplementary motor areas (the pre-SMA) [13, 14], while a negative-positive biphasic complex (N60-P90) was recorded in the upper bank of the Sylvian fissure (SII area) [15].…”

Section: Introductionmentioning

confidence: 99%

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Long-Latency Somatosensory Evoked Potentials of the Subthalamic Nucleus in Patients with Parkinson’s Disease

Trenado¹,

Elben²,

Friggemann³

et al. 2017

PLoS ONE

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Somatosensory evoked potentials (SSEPs) are a viable way to measure processing of somatosensory information. SSEPs have been described at the scalp and the cortical level by electroencephalographic, magnetoencephalographic and intracranial cortical recordings focusing on short-latency (SL; latency<40 ms) and long-latency (LL; latency>40 ms) SSEPs as well as by deep brain stimulation (DBS) electrode studies targeting SL-SSEPs. Unfortunately, LL-SSEPs have not been addressed at the subcortical level aside from the fact that studies targeting the characteristics and generators of SSEPs have been neglected for the last ten years. To cope with these issues, we investigated LL-SSEPs of the subthalamic nucleus (STN) in twelve patients with Parkinson’s disease (PD) that underwent deep brain stimulation (DBS) treatment. In a postoperative setting, LL-SSEPs were elicited by median nerve stimulation (MNS) to the patient’s wrists. Ipsilateral or contralateral MNS was applied with a 3 s inter-stimulus interval. Here, we report about four distinctive LL-SSEPs (“LL–complex” consisting of P80, N100, P140 and N200 component), which were recorded by using monopolar/bipolar reference and ipsi/contralateral MNS. Phase reversal and/or maximum amplitude provided support for the generation of such LL-SSEPs within the STN, which also underscores a role of this subcortical structure in sensory processing.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Long-Latency Somatosensory Evoked Potentials of the Subthalamic Nucleus in Patients with Parkinson’s Disease

Trenado¹,

Elben²,

Friggemann³

et al. 2017

PLoS ONE

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“…De later volgende P100 is een reflectie van de identificatie van input signalen binnen het kortetermijngeheugen. N140 is een reflectie van de predecisie en de P300 van postdecisie 13 en als zodanig waarschijnlijk van de informatie opslag.…”

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Neurophysiological disturbances of cognitive processing in Alzheimer and multi-infarct dementia. An evoked potential study

Colon¹

1994

Acta Neuropsychiatr.

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SummaryDisturbances in information processing can be established by means of evoked potentials (EP). Sensory information is transported over the white myelinated fibers towards the brain. Classification and storage will take place in the cortical grey. This kind of information processing can be made visible by means of EP's.In 9 patients with dementia. Alzheimer's type and 7 patients with multi-infarct dementia a delay in information processing has been established by means of EP's. In multi-infarct dementia also a delay in short latency components was determined. The generators of various parts of the information processing in the cerebral cortex have been delayed and distorted. We speculate that, beside loss of neurons in the cerebral cortex, an alteration in cortical glial cells might be the cause of some disturbances in patients with dementia.

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Alterations of Cortical Electrical Activity in Patients with Sacral Neuromodulator

et al. 2002

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Long latency somatosensory evoked potentials

Cited by 4 publications

References 70 publications

Long-Latency Somatosensory Evoked Potentials of the Subthalamic Nucleus in Patients with Parkinson’s Disease

Long-Latency Somatosensory Evoked Potentials of the Subthalamic Nucleus in Patients with Parkinson’s Disease

Neurophysiological disturbances of cognitive processing in Alzheimer and multi-infarct dementia. An evoked potential study

Alterations of Cortical Electrical Activity in Patients with Sacral Neuromodulator

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