EVALUATION OF THE EFFECT OF FORMALIN ON THE NUCLEUS RETICULAR IS PARAGIGANTOCELLULARISIN HYPERTHERMIC RATS USING SINGLE UNIT RECORDING

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GHEYBI N.A.; SEMNANIAN S.; FATH ELAHI Y.

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Journal: Physiology and Pharmacology Year:2001 | Volume:5 | Issue:1 Page(s): 67-74

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Title

EVALUATION OF THE EFFECT OF FORMALIN ON THE NUCLEUS RETICULAR IS PARAGIGANTOCELLULARISIN HYPERTHERMIC RATS USING SINGLE UNIT RECORDING

Author(s)

GHEYBI N.A. | SEMNANIAN S. | FATH ELAHI Y. | Issue Writer Certificate

Keywords

NUCLEUS RETICULARIS PARAGIGANTOCELLULARISQ4

HYPERTHERMIAQ3

FORMALINQ4

SINGLE UNIT RECORDINGQ4

Abstract

The NUCLEUS RETICULARIS PARAGIGANTOCELLULARIS (PGi) covers a large region in the rostral ventral medulla and shows a cytological and functional heterogeneity. In this study we evaluated responsiveness of the PGi neurons to the FORMALIN in hyperthermic condition by extracellular single-unit recording. The experiments were carried out on male anaesthetized NMRl rats. Baseline activity of 50 neurons in 36 animals was recorded for 60-180 min. Their firing rates was 1.37 spikes/sec. In 25 animals (25 neurons) temperature was raised from 35.5±0.1 to 38.5±0.1°c In this hyperthermic condition neuronal recording was carried out for 30 min, and then after 60 min, 50? I of diluted FORMALIN (5.2%) was injected into the plantar region of hindpaw. Our previous observation indicated three types of responsiveness of PGi neurons to the FORMALIN, that is, inhibited (48.4%), excited (19.3%) and unchanged (32.3%). However, statistical analysis showed only two neuronal types in hyperthermic condition, that is, excited (44%) and unchanged (56%).It is concluded that responses of the PGi neurons to the FORMALIN are affected by HYPERTHERMIA. In addition, inhibited neurons may be disinherited by fever-induced mediators.

Cites

اثر تزریق مرفین در ماده خاکستری دور قناتی بر روی نورون های هسته مشبک پاراژیگانتوسلولاریس پاسخ دهنده به فرمالین

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APA: Copy

GHEYBI, N.A., SEMNANIAN, S., & FATH ELAHI, Y.. (2001). EVALUATION OF THE EFFECT OF FORMALIN ON THE NUCLEUS RETICULAR IS PARAGIGANTOCELLULARISIN HYPERTHERMIC RATS USING SINGLE UNIT RECORDING. PHYSIOLOGY AND PHARMACOLOGY, 5(1), 67-74. SID. https://sid.ir/paper/75251/en

Vancouver: Copy

GHEYBI N.A., SEMNANIAN S., FATH ELAHI Y.. EVALUATION OF THE EFFECT OF FORMALIN ON THE NUCLEUS RETICULAR IS PARAGIGANTOCELLULARISIN HYPERTHERMIC RATS USING SINGLE UNIT RECORDING. PHYSIOLOGY AND PHARMACOLOGY[Internet]. 2001;5(1):67-74. Available from: https://sid.ir/paper/75251/en

IEEE: Copy

N.A. GHEYBI, S. SEMNANIAN, and Y. FATH ELAHI, “EVALUATION OF THE EFFECT OF FORMALIN ON THE NUCLEUS RETICULAR IS PARAGIGANTOCELLULARISIN HYPERTHERMIC RATS USING SINGLE UNIT RECORDING,” PHYSIOLOGY AND PHARMACOLOGY, vol. 5, no. 1, pp. 67–74, 2001, [Online]. Available: https://sid.ir/paper/75251/en

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