The chemoarchitectonics of the diencephalon of frog (rana tigrina)

✍ Scribed by P. P. Sood

• Publisher: John Wiley and Sons
• Year: 1979
• Tongue: English
• Weight: 887 KB
• Volume: 4
• Category: Article
• ISSN: 0360-4012
• DOI: 10.1002/jnr.490040107

✦ Synopsis

Abstract

The study deals with the distribution of acid and alkaline phosphates, ATPase, 5‐nucleotidase, nonspecific esterase, specific cholinesterase, and β‐galactosidase in the diencephalon on the frog.

The highlights of the present study are the following: (i) Acid phosphatase is present in all the neurons, whereas the tracts and commissures are completely negative. (ii) Most of the tracts and commissures are positive for 5‐nucleotidase. This confirms the author's previous findings that the tracts and commissures of all the areas of frog brain are intensely positive for 5‐nucleotidase. (iii) β‐galactosidase activity in the nuclei of the diencephalon is either mild or completely absent, whereas the commissures and tracts show positive activity. (iv) Habenulothalamic connections are intensely positive for specific cholinesterase and non‐specific esterase, moderately positive for β‐galactosidase and completely negative for other enzymes. (v) The epiphysis (pineal organ) shows intense reaction for adenosine triphosphatase, acid phosphatase, and 5‐nucleotidase and moderate reaction for alkaline phosphatase and non‐specific esterase. In contrast to the above enzymes, the specific cholinesterase and β‐galactosidase are completely missing. (vi) Lateral forebrain bundles are completely negative for all the enzymes except alkaline phosphatase and β‐galactosidase.

The distribution of these enzymes has been correlated with the functional aspects of various nuclei, tracts, and commissures of the diencephalon of the frog.