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Titolo:
THE EFFECTS OF CORTICAL STIMULATION, ANESTHESIA AND RECORDING SITE ONSOMATOSENSORY-EVOKED POTENTIALS IN THE RAT
Autore:
KOYANAGI I; TATOR CH;
Indirizzi:
TORONTO HOSP,PLAYFAIR NEUROSCI UNIT,WESTERN DIV,399 BATHURST ST TORONTO ON M5T 2S8 CANADA TORONTO HOSP,PLAYFAIR NEUROSCI UNIT,WESTERN DIV TORONTO ON M5T 2S8 CANADA TORONTO HOSP,DIV NEUROSURG,CANADIAN PARAPLEG ASSOC,SPINAL CORD INJURYRES LAB TORONTO ON M5T 2S8 CANADA UNIV TORONTO TORONTO ON CANADA
Titolo Testata:
ELECTROMYOGRAPHY AND MOTOR CONTROL-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
fascicolo: 6, volume: 101, anno: 1996,
pagine: 534 - 542
SICI:
0924-980X(1996)101:6<534:TEOCSA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPINAL-CORD INJURY; NITROUS-OXIDE; ARTERY-OCCLUSION; MOTOR; BRAIN; RESPONSES; CORTEX; CATS;
Keywords:
SOMATOSENSORY EVOKED POTENTIAL; MOTOR EVOKED POTENTIAL; CEREBELLAR EVOKED POTENTIAL; RAT; SPINAL CORD MONITORING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
I. Koyanagi e C.H. Tator, "THE EFFECTS OF CORTICAL STIMULATION, ANESTHESIA AND RECORDING SITE ONSOMATOSENSORY-EVOKED POTENTIALS IN THE RAT", ELECTROMYOGRAPHY AND MOTOR CONTROL-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 101(6), 1996, pp. 534-542

Abstract

The purpose of this study was to standardize the method of spinal cord monitoring with evoked potentials in the rat. Seventeen male Wistar rats were anesthetized with alpha-chloralose and urethane. Somatosensory evoked potential (SEP) and cerebellar evoked potential (CEP) following sciatic nerve stimulation were mapped at different time points after induction of anesthesia. SEP peaks at latencies of 13-28 ms (P13, N18) were localized to an extremely small area over the sensory cortex. In contrasts, a negative peak of the SEP at 11 ms (N11) and the CEP were widely distributed over the cerebral or cerebellar surface. Anesthesia significantly influenced the cortical components of the SEP. In 10 rats, MEP or posterior fossa evoked potential (PEEP) following stimulation of the sensorimotor or cerebellar cortices respectively, were recorded at T9. Stimulation of different points produced little change on the waveforms of the MEP or PEEP. Successive recordings of MEP and SEP revealed that the P13-N18 complex of the SEP was markedly suppressed after MEP recordings were made. In conclusion, this study identified several factors which alter SEP waveforms in the rat including location of recording, anesthesia and sequence with respect to MEP recording. MEP by stimulation of the same sensory cortex as SEP recordings should not be used for concurrent monitoring, since cortical stimulation will change the waveforms of the SEP. Copyright (C) 1996 Elsevier Science Ireland Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/08/20 alle ore 11:00:20