The H I Mind Theory of Core Consciousness.
John Cochrane – 13 May 2025
Abstract
This theory represents the fourth in a series of four independent but complementary components of the H I Mind Model of consciousness. Each theory addresses a distinct aspect of human consciousness and does not rely on the others for explanatory validity. The present theory proposes a possible mechanism for how core consciousness integrates bilateral neural processing—originating from both cerebral hemispheres—into the unified stream of conscious experience typically reported by human beings. The integration of hemispheric contributions is hypothesized to amplify the qualitative and functional attributes of consciousness, enhancing attentional control, behavioral adaptability, and resilience.
Introduction
Core consciousness refers to the integrated, temporally continuous experience of the self in the present moment, supported by a range of neurocognitive processes (Damasio, 1999; Seth and Bayne, 2022). The unification of mental content from both hemispheres remains a central question in understanding the neural basis of consciousness. This theory explores how dual-hemispheric simulations may be dynamically combined to form a singular conscious narrative, drawing on structures such as the corpus callosum, claustrum, and working memory systems.
1. Hemispheric Contributions to Conscious Simulation
Building upon the H I Mind Model, each hemisphere is proposed to contain two "focuses of mind," each capable of generating internal simulations. These simulations are not necessarily symmetrical or identical; rather, they are partially independent and differentially attuned to environmental and internal stimuli (Gazzaniga, 2000; McGilchrist, 2009). Core consciousness, then, is conceptualized as a unifying executive function that integrates these simulations into a cohesive stream within working memory.
Neural coordination between hemispheres is primarily mediated by the corpus callosum, a dense bundle of commissural fibers enabling interhemispheric communication. Additionally, the claustrum—a thin sheet of gray matter with extensive reciprocal connectivity to virtually all cortical areas—has been implicated in the binding of multimodal sensory information and may play a central role in the synchronization of conscious content (Crick and Koch, 2005; Smith et al., 2020).
2. Proposed Mechanisms of Integration
Three hypothetical mechanisms are proposed for the integration of hemispheric processing into core consciousness. Each mechanism may operate under different conditions or cognitive states:
2.1 Rapid Alternation (Simulation Switching)
One possibility involves rapid, alternating engagement between hemispheric simulations, where each hemisphere contributes sequential updates to a shared working memory. This "cognitive multiplexing" would produce the illusion of continuity, akin to frames in a video stream, and aligns with known phenomena of neural oscillation synchrony in the gamma frequency range during perceptual binding (Fries, 2005; Engel and Singer, 2001).
This dynamic process may underpin the subjective feeling of self-monitoring or internal observation, a hallmark of reflective consciousness.
2.2 Dialogical Simulation (Hemispheric Conversation)
A second possibility involves a bidirectional exchange—analogous to an internal dialogue—where each hemisphere alternately "proposes" and "responds" within working memory. This model draws upon evidence that hemispheres may independently process complex stimuli and even generate distinct affective and cognitive appraisals, particularly in split-brain conditions (Gazzaniga, 2011).
The sense of self-awareness in this model would stem from the resolution or reconciliation of competing simulations, functioning similarly to deliberative reasoning or problem-solving.
2.3 Hemispheric Predominance with Intuitive Override
A third possibility posits hemispheric dominance, where one hemisphere sustains the principal simulation while the other contributes intuitive or alternative interpretations. These intuitive insights may influence the primary narrative subtly, perhaps manifesting as gut feelings or spontaneous reframing of thought. This mirrors McGilchrist’s hypothesis regarding the right hemisphere's role in broad, context-sensitive interpretations and the left hemisphere’s focus on narrow, goal-directed processing (McGilchrist, 2009).
Working memory in this case may support multiple coexisting representations, with self-awareness emerging from continuous monitoring and selective incorporation of alternatives.
3. Hemispheric Self-Observation and Working Memory
Central to all three mechanisms is the concept of self-observation—a process wherein consciousness monitors its own cognitive activity. This can be conceptualized as both "being the self" and "thinking about the self." The integration of working memory plays a pivotal role here by acting as a shared platform for simulation outputs, attentional focus, and narrative continuity (Baddeley, 2003; Baars, 1997).
Recent studies suggest that while hemispheres can maintain functionally independent working memories, coordinated activity—particularly involving prefrontal-parietal networks—enables the unified sense of agency and continuity (Christophel et al., 2017; Fuster, 2015).
4. Implications and Future Research
This model proposes a testable framework for how core consciousness might emerge from bilateral simulation integration. It suggests a spectrum of possible integration strategies, from rapid switching to dialogical exchange and intuitive modulation. These mechanisms, if confirmed, could explain the variability of conscious experience across cognitive tasks and emotional states.Future empirical research should explore:
• The degree and nature of hemispheric contributions to working memory in conscious tasks.
• The role of interhemispheric synchrony in maintaining a unified self.
• The potential involvement of the claustrum and corpus callosum in coordinating conscious content.
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