Page 32 - AIH-2-3
P. 32

Artificial Intelligence in Health                                               Machine consciousness



            networks control the level of consciousness.  Studies   consciousness evolves to handle increasingly complex
                                                  31
            using both animal models and human brain disorder cases   scenarios, the importance of robust memory systems
            have long recognized that cortical and subcortical regions   continues to grow. However, present artificial consciousness
            play a crucial role in the state of awareness.  The cortical   frameworks often lack sophisticated memory models. In
                                               32
            components of the consciousness system are primarily   humans, memory systems interact closely with conscious
            located in the higher-order “heteromodal” association   experience during learning, rehearsal, and retrieval. 46,47
            cortex.  On the medial surface of the brain, these include
                 33
            the medial frontal, anterior cingulate, posterior cingulate,   2.2. Prediction
            and medial parietal cortices. On the lateral surface, the   Prediction is considered a vital capability for artificial
            consciousness system involves the lateral frontal cortex,   consciousness systems. Conscious organisms predict
            anterior insula, orbital frontal cortex, and lateral temporal-  events  by  reflecting  relationships  between  real-world
            parietal association area. 34,35                   states within their internal structures.  Similarly,
                                                                                                   43
              Specific  areas  within  the  higher-order  association   an  artificially  conscious  machine  must  be  capable  of
            cortex significantly influence cognitive functions in both   accurate  event  prediction  to  respond  effectively  or  take
            the dominant and non-dominant hemispheres.  The state   pre-emptive measures. This requires real-time, flexible
                                                 36
            of consciousness is determined by the combined activity   components capable of constructing causal, statistical,
            of extensive portions of the bilateral association cortex,   spatial, functional, and dynamic models of the world.
            regardless of the distinct roles played by individual regions   A  conscious machine should demonstrate predictive
            or networks. 37,38  These higher-order cortices collaborate   abilities across various contexts, including uncertain and
            with subcortical arousal systems to regulate arousal,   dynamic environments, showcasing coherent forecasting
                                                                                    45
            attention, and consciousness. 39                   and contingency planning.
              Subcortical components of the consciousness system   2.3. Awareness
            include the basal forebrain, thalamus, hypothalamus, and   Awareness, though challenging to define precisely, involves
            upper brainstem activation systems. Other subcortical   constructing and testing alternative models of processes
            regions, such as portions of the cerebellum, amygdala,   based on sensory or cognitive information.  It is essential
                                                                                                 48
            claustrum, and basal ganglia, are likely involved as well.   for predictions  and requires significant flexibility to
                                                                           49
            Several parallel neurotransmitter systems contribute to   model the physical environment, internal states, and other
            subcortical arousal, including glutamate, acetylcholine,   conscious entities. This adaptability is crucial for artificial
            serotonin, dopamine, histamine, gamma-aminobutyric   systems attempting to replicate human-like awareness.
            acid, norepinephrine, and orexin. Each of these pathways
            plays a distinct role. However, it is the coordinated and   2.4. Learning
            simultaneous actions of these subcortical and cortical   Learning is a cornerstone of artificial consciousness
            structures that collectively regulate the degree of   systems. 50,51  Conscious  experience  facilitates  the
            consciousness. 40                                  representation of and reaction to novel, significant stimuli.
                                                                                                            46
            2. Consciousness-related elements                  Learning encompasses complex adaptation mechanisms
                                                               grounded in sensitivity to subjective experience, enabling
            Research emphasizes  that  the  proper  functioning of   agents to exert flexible control over behaviors in uncertain
            consciousness is integral to various mental processes. 41-43    and dynamic environments. 52
            Studies suggest that consciousness fulfills multiple
            roles, 42,44,45  including  memory, prediction, awareness,   2.5. Experience
            learning,  and  experience  –  components  intricately   Subjective experience, rooted in sensory perception, is
            linked to cognitive processes. A primary goal of artificial   often considered central to the study of consciousness.
                                                                                                            53
            consciousness is to replicate these components in machines.   Experience  is intrinsically linked to  precise pattern
            This list is not exhaustive, as numerous additional functions   recognition and may even be observed at molecular levels.
            of consciousness remain unexplored.                In  discussing  consciousness,  the  brain’s central  modules
                                                               can be viewed as carriers of unique experiential states.
            2.1. Memory                                        Reflexive awareness, or the act of reflecting on one’s own
            Memory is a fundamental aspect of human cognition and   experiences, is a critical dimension of consciousness.
            a growing focus in artificial consciousness systems. In   Efforts to define fundamental experiences underscore the
            humans, memory storage occurs in three forms: Short-  enduring challenge of addressing the “hard problem” of
            term, long-term, and sensory memory. As artificial   consciousness, as its exact nature remains elusive. 54


            Volume 2 Issue 3 (2025)                         26                               doi: 10.36922/aih.5690
   27   28   29   30   31   32   33   34   35   36   37