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Unity and diversity of frontal lobe functions
Acta Neurobiologiae Experimentalis
|January 1, 1972
Summary
Research on granular prefrontal cortex function in primates reveals progress in localization and timing of effects. However, understanding the specific functions and neural mechanisms remains a challenge, potentially addressed by corollary discharge theories.
Area of Science:
- Neuroscience
- Primate Cognition
- Comparative Neurology
Background:
- The granular prefrontal cortex (PFC) plays a crucial role in higher cognitive functions across species.
- Understanding PFC function is complex, involving localization, temporal dynamics, and neural mechanisms.
- Previous research has established symptom localization and temporal factors in PFC studies.
Purpose of the Study:
- To review recent advancements in understanding the functions of the granular prefrontal cortex in primates.
- To identify key unresolved questions regarding the 'what' and 'how' of PFC function.
- To explore potential theoretical frameworks, such as corollary discharges, for future research.
Main Methods:
- Review of recent scientific literature on granular prefrontal cortex functions.
- Analysis of studies addressing localization ('where') and temporal aspects ('when') of PFC lesions and activity.
- Examination of hypotheses concerning the physiological roles of the PFC.
Main Results:
- Significant progress has been made in mapping PFC symptom localization ('where') with distinct gradients in monkeys and lateralization in humans.
- Temporal analyses ('when') differentiate effects of early vs. late lesions and single vs. serial removals.
- The specific functional significance ('what') of PFC symptoms and the operational mechanisms ('how') of individual neurons remain largely undetermined.
Conclusions:
- While localization and timing of PFC functions are better understood, the precise 'what' and 'how' require further investigation.
- Hypotheses suggesting the PFC as a source of 'corollary discharges' offer a promising avenue for future research.
- Understanding PFC's role in pre-setting sensory systems for action consequences may elucidate its complex functions.
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