Relationship Between Hippocampal Theta-Wave Frequency and Emotional Behaviors in Rabbits Produced With Stresses or Psychotropic Drugs | Zendy

Jyunji Yamamoto | Zendy

Open Access

Relationship Between Hippocampal Theta-Wave Frequency and Emotional Behaviors in Rabbits Produced With Stresses or Psychotropic Drugs

Author(s) -

Jyunji Yamamoto

Publication year - 1998

Publication title -

the japanese journal of pharmacology

Language(s) - English

Resource type - Journals

eISSN - 1347-3506

pISSN - 0021-5198

DOI - 10.1254/jjp.76.125

Subject(s) - hippocampal formation , theta rhythm , emotionality , emotional stress , psychology , electroencephalography , reserpine , hippocampus , novelty , methamphetamine , brain waves , neuroscience , audiology , physics , developmental psychology , medicine , psychiatry , social psychology

The hippocampal EEG power spectra of rabbits were analyzed to clarify the relationship between the theta-wave and emotionality. The relative power of T2 (6.0-7.9 Hz)/T1 (4.0-5.9 Hz) represented the index of theta-wave change. Emotional excitement (produced with novelty stress or methamphetamine) or suppression (produced with restraint stress or reserpine) increased or decreased T2/T1 ratios within around +/- 1 Hz changes. Furthermore, the imaging patterns of the peak feature make possible detailed characterization of emotional states. These results suggest that the hippocampus finely adjusts the theta-wave on a +/- 1 Hz level, with a fine balance of voltage, in response to the emotional activity.

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