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International Journal of Physiology and Pathophysiology

年間 4 号発行

ISSN 印刷: 2155-014X

ISSN オンライン: 2155-0158

SJR: 0.116

Laminar Distribution of the Active Spinal Neurons during the Feeding-Related Stereotyped Movements in Rat

巻 2, 発行 2, 2011, pp. 121-131
DOI: 10.1615/IntJPhysPathophys.v2.i2.30
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要約

The comparative study of expression of early c-fos gene (marker of neuronal activation) and NADPH-diaphorase reactivity (NADPH-dr) was performed in the cervical spinal cord of rats in the control (intact) animals, in the state of starvation and after realization of long-lasting (repeated 4 to 12 times per minute for 30 min) motivated stereotyped food-procuring forelimb movements. In comparison with control rats in animals in starving state or after forelimb movement to reach-to-grasp the food, the number of Fos-immunoreactive (Fos-ir) cells in the dorsal and ventral horns of a 40-μm-thick sections was significantly greater (P < 0.05). Increase of Fos immunoreactivity in the superficial (2i, 3) and deeper (4, 5) layers of the dorsal horn was initiated, evidently, by signals from peripheral and supraspinal structures. We also found labeled cells within layers 6−8, and 9 demonstrating the activity of interneurons and motoneurons directly involved into generation of operant forelimb movements. According to our data, high density of NADPH-dr/NO-generating neurons in the C6/C7 segments is observed in the substance gelatinosa (layer 2i) and layers 7 and 10. NADPH-dr cells and Fos-ir neurons were intermixed within the layers but did not demonstrate double-labeling. It is possible to suggest that under realization of the studied operant reflexes, which did not include nociceptive component NADPH-dr/NO-generating cells of the spinal cord did not operate.

によって引用された
  1. Man’kovskaya Yelena P., Maisky Vladimir A., Vlasenko Oleh V., Maznychenko Andriy V., 7-Nitroindazole enhances c-Fos expression in spinal neurons in rats realizing operant movements, Acta Histochemica, 116, 8, 2014. Crossref

  2. Maznichenko A. V., Vlasenko O. V., Man’kovskaya Ye. P., Buzyka T. V., Maisky V. A., A Blocker of NO Synthase Intensifies c-fos Expression in Spinal Neurons of Rats Realizing Stereotypic Movements, Neurophysiology, 46, 5, 2014. Crossref

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