Electrophysiological correlates of the limbic-motor interactions in various behavioral states in rats

Anna Korzeniewska, Stefan Kasicki, Jolanta Zagrodzka

Research output: Contribution to journalArticle

Abstract

Depth electroencephalographic (EEG) activity was recorded from basolateral amygdala (BLA), ventral subiculum (VSB), n. accumbens (ACC) and subpallidal area (SPL) in freely moving rats, during locomotor tasks with various types of reinforcement in order to compare the strength of limbic- motor interactions in selected behavioral situations. For all EEG signals multichannel coherences (ordinary, multiple and partial) were calculated using autoregression model. Partial coherences indicate the level of synchronization between two signals, thus they were assumed to indicate the strength of direct connection between the structures from which these signals have been recorded. The partial coherences were calculated for six selected frequency bands and the strength of connections within the BLA-VSB-ACC-SPL circuit was estimated for two different behavioral situations and compared. It was found that the strength of connections is sensitive to changes in both motor and emotional aspects of behavioral situation: the strength of BLA- VSB, VSB-ACC, and ACC-SPL depended on motor demands of behavioral task; these of BLA-VSB increased in the highest frequency bands in all emotionally engaging situations when compared with well trained locomotion; the strength of ACC-SPL increased in situations when automatic stereotyped motor behavior was induced by biologically important stimuli, while it decreased or did not change in the motor tasks demanding more precise and quickly adjustable movements. The results are discussed according to the motor-limbic integration model proposed by Mogenson and show the dynamics of its connections in relation to the motivational-emotional context of the task.

Original languageEnglish (US)
Pages (from-to)69-83
Number of pages15
JournalBehavioural Brain Research
Volume87
Issue number1
DOIs
StatePublished - Aug 1997
Externally publishedYes

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Hippocampus
Stereotyped Behavior
Locomotion
Basolateral Nuclear Complex

Keywords

  • Awake rat
  • Depth EEG
  • Emotional states
  • Limbic-motor relations
  • Partial coherences

ASJC Scopus subject areas

  • Behavioral Neuroscience

Cite this

Electrophysiological correlates of the limbic-motor interactions in various behavioral states in rats. / Korzeniewska, Anna; Kasicki, Stefan; Zagrodzka, Jolanta.

In: Behavioural Brain Research, Vol. 87, No. 1, 08.1997, p. 69-83.

Research output: Contribution to journalArticle

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