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["Animal hypnosis" and defensive dominant, behavioral aspect]
R A Pavlygina1, A G Galashina, A V Bogdanov
1Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
Zhurnal Vysshei Nervnoi Deiatelnosti Imeni I P Pavlova
|October 24, 2002
Summary
Researchers studied how animal hypnosis affects brain activity in rabbits. Hypnosis made it harder to create a dominant brain focus from left paw stimulation, suggesting hemispheric differences in hypnosis influence.
Area of Science:
- Neuroscience
- Animal Behavior
- Electrophysiology
Context:
- Investigating the neural mechanisms underlying conditioned responses.
- Exploring the effects of induced states on cortical excitability.
- Utilizing electrodermal stimulation and auditory stimuli in animal models.
Purpose:
- To determine if electrodermal stimulation can create stationary excitation foci in the sensorimotor cortex.
- To examine the influence of an induced 'animal hypnosis' state on these cortical foci.
- To ascertain if hypnosis affects the formation of excitation foci differently between brain hemispheres.
Summary:
- Rhythmic electrodermal paw stimulation in rabbits induced stationary excitation foci in the sensorimotor cortex, leading to reactions to previously neutral sound stimuli.
- These responses occurred in approximately 70% of trials regardless of the stimulated paw (left or right).
- Following a single induction of 'animal hypnosis,' inducing a dominant focus via left paw stimulation became difficult, while right paw stimulation showed no significant difference from control conditions.
Impact:
- Demonstrates that induced hypnosis can differentially modulate cortical excitability in different brain hemispheres.
- Highlights potential lateralized effects of hypnosis on sensory processing and defensive responses.
- Provides insights into the neurophysiological underpinnings of hypnosis and its interaction with sensory-motor pathways.