Influence of the epithalamic brain region on amphibian chromatophore behavior

M. Duff Davis, Mac E. Hadley

Research output: Contribution to journalArticlepeer-review


The possible influence of the epithalamic area on melanophore-stimulating hormone (MSH) release was investigated in Rana berlandieri forreri (Rana pipiens, sensu lato). Electrical stimulation of a specific region on the diencephalic roof resulted in a reversible darkening of skin melanophores. The latency between stimulation and onset of melanophore dispersion averaged from 1 to 3 min. Hypophysectomy, however, prevented the electrical stimulation-induced melanophore response from occurring. Thus, a neuronal, humoral, or integrated neuroendocrine pathway apparently develops from the diencephalon, in proximity to the pineal-subcommissural complex, to regulate pars intermedia MSH secretion.

Original languageEnglish (US)
Pages (from-to)52-56
Number of pages5
JournalGeneral and Comparative Endocrinology
Issue number1
StatePublished - Jan 1979

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Endocrinology


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