EFFECT OF THE DORSAL RAPHE NUDENS ELECTRICAL STIMULATION ON EVOKED RESPONSE OF THE IV LAYERS AND V BARREL CORTICAL NEURONS IN RAT

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AFARINESH M.R.; SHEYBANI VAHID; FARAZIFARD R.; ABBASNEZHAD M.; SHAMSI ZADEH A.

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Journal: JOURNAL OF RAFSANJAN UNIVERSITY OF MEDICAL SCIENCES AND HEALTH SERVICES Year:2007 | Volume:6 | Issue:3 (24) Page(s): 155-162

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Title

EFFECT OF THE DORSAL RAPHE NUDENS ELECTRICAL STIMULATION ON EVOKED RESPONSE OF THE IV LAYERS AND V BARREL CORTICAL NEURONS IN RAT

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Keywords

BARREL CORTEXQ3

DORSAL RAPHE NUCLEUSQ3

RATQ2

ELECTRICAL STIMULATIONQ3

Abstract

Background and Objective: Seretonergic pathway is one of the neuromodulatory mechanisms which mainly originates from DORSAL RAPHE NUCLEUS (DRN). In order to explore the role of serotonin on sensory processing, we investigated the effect of DRN stimulation on response properties of the IV layer and V neurons of whisker related area of RAT somatosensory cortex.Materials and Methods: In this study twenty adult male Wistar RATs (250-350gr) were used. DRN was stimulated at 0, 50, 100, 200 and 400ms before principal or adjacent whiskers deflection individually or in a condition test paradigm.For assessing the effect of DRN stimulation on inhibitory receptive field of barrel neurons, adjacent whisker was also deflected 20ms before principal whisker deflection.Results: DRN stimulation decreased the on response magnitude of layer V neurons to principal whisker deflection (p<0.05). The On response latency of the layer IV of neurons increased when DRN was stimulated 200 or 400ms before principal whisker deflection (p<0.05 and p<0.01 respectively).DRN stimulation had no effect on both the On response magnitude and latency of neurons to adjacent whisker deflection. We observed a decrease in inhibitory effect of adjacent whisker deflection on the magnitude of neuronal response to principal whisker deflection on the IV layer when DRN was stimulated 200ms before principal whisker deflection (p<0.05).Conclusion: Our results suggest that DRN have a modulatory effect on information processing in somatosensory cortex of RATs.

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APA: Copy

AFARINESH, M.R., SHEYBANI, VAHID, FARAZIFARD, R., ABBASNEZHAD, M., & SHAMSI ZADEH, A.. (2007). EFFECT OF THE DORSAL RAPHE NUDENS ELECTRICAL STIMULATION ON EVOKED RESPONSE OF THE IV LAYERS AND V BARREL CORTICAL NEURONS IN RAT. JOURNAL OF RAFSANJAN UNIVERSITY OF MEDICAL SCIENCES AND HEALTH SERVICES, 6(3 (24)), 155-162. SID. https://sid.ir/paper/71105/en

Vancouver: Copy

AFARINESH M.R., SHEYBANI VAHID, FARAZIFARD R., ABBASNEZHAD M., SHAMSI ZADEH A.. EFFECT OF THE DORSAL RAPHE NUDENS ELECTRICAL STIMULATION ON EVOKED RESPONSE OF THE IV LAYERS AND V BARREL CORTICAL NEURONS IN RAT. JOURNAL OF RAFSANJAN UNIVERSITY OF MEDICAL SCIENCES AND HEALTH SERVICES[Internet]. 2007;6(3 (24)):155-162. Available from: https://sid.ir/paper/71105/en

IEEE: Copy

M.R. AFARINESH, VAHID SHEYBANI, R. FARAZIFARD, M. ABBASNEZHAD, and A. SHAMSI ZADEH, “EFFECT OF THE DORSAL RAPHE NUDENS ELECTRICAL STIMULATION ON EVOKED RESPONSE OF THE IV LAYERS AND V BARREL CORTICAL NEURONS IN RAT,” JOURNAL OF RAFSANJAN UNIVERSITY OF MEDICAL SCIENCES AND HEALTH SERVICES, vol. 6, no. 3 (24), pp. 155–162, 2007, [Online]. Available: https://sid.ir/paper/71105/en

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