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[Non-reflex activity of the CNS]
1Ustav fyziologie 2. LF UK, Praha.
Ceskoslovenska Fysiologie
|June 1, 1995
Summary
Neural activity is not solely reflexive; endogenous rhythms control many complex behaviors like locomotion and speech. Central pattern generators, influenced by peripheral feedback, drive these intrinsic, often older, patterns.
Area of Science:
- Neuroscience
- Ethology
- Chronobiology
Context:
- Sherrington's reflexive model of the nervous system is being updated.
- Biological rhythms demonstrate endogenous neural activity.
- Complex behaviors challenge the reflex-chain hypothesis.
Purpose:
- To explore the role of endogenous rhythms in neural activity.
- To differentiate between reflexive and non-reflexive behaviors.
- To investigate the origins of complex motor acts.
Summary:
- Neural activity includes endogenous rhythms, not just reflexes.
- Central pattern generators (CPGs) control rhythmic movements like locomotion and alimentary processes.
- Peripheral information modulates CPG output.
- Fixed-action patterns and internally planned behaviors (e.g., speech, piano playing) represent complex, non-reflexive actions.
- Non-reflexive behaviors are ontogenetically and phylogenetically older than reflexes.
Impact:
- This research reframes our understanding of the nervous system's control mechanisms.
- It highlights the significance of intrinsic oscillators in generating complex behaviors.
- It suggests a deeper evolutionary history for non-reflexive neural control.