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[A neurobiological model of mind]
1Servicio del Hospital Nacional Dr. Braulio Moyano, Buenos Aires, Argentina.
Acta Psiquiatrica Y Psicologica De America Latina
|March 1, 1993
Summary
The dorsal cerebral cortex handles actions and objects, while the ventral cortex manages risk assessment and inhibition. This distinction in brain regions helps explain disinhibition in certain neurological and psychiatric conditions.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- The cerebral cortex has distinct dorsal and ventral regions with differing functions.
- Dorsal cortex is linked to archicortex (hippocampal allocortex), involved in action elaboration.
- Ventral cortex is linked to paleocortex (olfactory allocortex), involved in risk assessment and inhibition.
Purpose of the Study:
- To establish the functional difference between dorsal and ventral cerebral cortex regions.
- To explore the role of these distinctions in disinhibition syndromes.
- To explain disinhibition phenomena in schizophrenia.
Main Methods:
- Comparative analysis of dorsal and ventral cortex functions.
- Examination of disinhibition syndromes in patients with ventral lesions.
- Correlation of findings with clinical presentations in schizophrenia.
Main Results:
- Dorsal cortex elaborates acts and associated objects.
- Ventral cortex develops preventive values to inhibit dangerous actions.
- Ventral lesions are primarily associated with disinhibition syndromes.
Conclusions:
- A clear functional dichotomy exists between dorsal and ventral cerebral cortex.
- This distinction provides a framework for understanding disinhibition syndromes.
- The dorsal-ventral difference may explain disinhibition observed in schizophrenia.