Stretch sensory ovarian-preoptic pathway in the teleost,Clarias batrachus (Linn.): Transection studies

✍ Scribed by Deshmukh, Makrand K. ;Subhedar, Nishikant

• Book ID: 102891966
• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 605 KB
• Volume: 267
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402670402

✦ Synopsis

Abstract

Application of intraovarian pressure (IOP), coupled with placement of discrete lesions, has been employed to study the organization of the pressure excitable ovarian‐preoptic pathway in a teleost, Clarias batrachus. While bilateral administration of the IOP triggered stimulatory changes in the nucleus preopticus (NPO), they were abolished if the IOP administration was preceded by the bilateral transection at the level of (1) foramen magnum, (2) spinal cord at the level of 13th vertebra, (3) dorsal spinal nerve roots between the levels of 13th and 21st vertebrae, and (4) at the junction between the common oviduct and the body wall. On the other hand, bilateral sectioning of the anterior mesovarium, the vagi, or the spinal cord at the level of 21st vertebra had no effect. Unilateral administration of the IOP triggered bilateral changes in the NPO. It seems that the stretch receptors in the ovarian wall give rise to processes that proceed along the margin of the oviduct and enter the spinal cord via the dorsal nerve roots between 13th and 21st vertebrae. Thereafter, the pathway seems to ascend over the spinal cord and impinge on the ipsilateral as well as contralateral NPO. © 1993 Wiley‐Liss, Inc.