Hypothalamically induced emotional behavior and immunological changes in the cat

Yoshinobu Mori, Jingyi Ma, Sansei Tanaka, Kyoji Kojima, Koji Mizobe, Chiharu Kubo, Nobutada Tashiro

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Numerous animal studies on the correlation between stress and immunity have been performed but few such studies have been made concerning the relationship between various kinds of stress-related emotional behavior and immunological changes. Electrical stimulation of the hypothalamus in cats elicits various emotional behaviors such as restlessness, defensive attack, defensive retreat and quiet biting attack. We examined changes in the lymphocyte proliferative responses and plasma cortisol level which accompanied such emotional behavior. A significant increase in plasma cortisol was observed in the restlessness, defensive attack and defensive retreat groups, but not in the quiet biting attack or non-response (control) groups. A significant increase in the lymphocyte proliferative responses to phytohemagglutinin (PHA) was observed in the restlessness and defensive attack groups but not in the defensive retreat, quiet biting attack or non-response groups. These results suggest that various kinds of emotional behavior appear to be differentially correlated with the lymphocyte proliferative responses, while also being differentially correlated with the plasma cortisol concentration. Because the changes in lymphocyte responses and plasma cortisol did not always completely correlate with one another, the changes in the lymphocyte responses are not considered to be influenced by plasma cortisol alone.

Original languageEnglish
Pages (from-to)325-332
Number of pages8
JournalPsychiatry and clinical neurosciences
Issue number4
Publication statusPublished - 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Neuroscience
  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health


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