Acta Scientific Neurology (ISSN: 2582-1121)

Review ArticleVolume 4 Issue 4

Neural Memory and Mentation

Gerard Marx1* andChaim Gilon2

11MX Biotech Ltd., Jerusalem, Israel 2Institute of Chemistry, HebrewUniversity, Jerusalem, Israel

*Corresponding Author:Gerard Marx, MX Biotech Ltd., Jerusalem, Israel.

Received: March 03, 2021; Published: March 24, 2021;


  From time immemorial, philosophers and theologians struggled to describe how mental states emerge from the operations of the brain. Our own efforts have been focused on memory and emotive states. We define the words:“Mentation”, “sensation” or “feelings”, “emotions”, “memory” and “mind”. In particular, we distinguish betweencomputer memory and neural memory, the former being “demotive”, the latter imbued with emotive qualities. Feelings are sensations linked to psychic states; Emotions are the recall of feelings. The minimal cognitive unit of information (cuinfo) on which memory is based, is outlined by a tripartite mechanism (Marx andGilon, 2012-2020).NTs ejected from neural vesicles, elicit a range of physiologic reactions linked to emotive states and encode these in conscious memory. Thus, emotions applying to all animals could be considered as remembered feelings.But “Mind” is a unique human quality,memory expressed through language. Mentation and memory are merged qualities instigated by the neural net that transcends metabolic energy into a mental dimension. We suggest that the neural net integrates the cuinfo contributions of individual neurons and consolidates them into comprehensible recall, experienced as “memory”. The neural net generates memory by melding physiologic processes with biochemical reactions. Effectively, mind emerges from the embodiment of memory.

Keywords:Mentation; Emotions; Memory; Brain


Q: What are the processes that permit the neural net to generate a mental state such as memory?

  From time immemorial, philosophers and theologeans struggled to describe how mental states emerge from the workings in our heads. Descartes, a mathematician, was torn between Body and Mind [1,2]. Some offered concepts related to ghosts or spirits, though this was debunked by others [3].Others, considered the brain as an evolved organ that instigates a talent for language, expressed as “mind”[4]. A literary critic’s heroic attempt to unify the clinical, linguistic and psychological aspects of memory was deficient in a number of respects [5]. There was no mention of key words, namely: Chemistry, molecule, neurotransmitter, signal, physiology, terms that could be used tocredibly account for the emergence of a mental talent from an assembly of viable neurons.

  Alternate efforts related to the “information theory” [6-9]. Biologists joined in this enterprise, linking it to evolution [10-12]. In particular, neurophysiologists focused on electrodynamic signaling between neurons, measured by various techniques (EEG, EKG, PET, fMRI). The literature is too vast to encapsulate here in a few paragraphs but can be accessed in Google.

  One could consider that neural memory involves a phase change of metabolic energy into mental experience.One cannot easily calculate the energy cost of an individual cuinfo. It must be a fraction of the 340 cal/day expended by the active human brain (1010 neurons) whichcollectively remember (Note: 1 watt per day = 20,636.29 cal/d). Compared to a supercomputerwhich expends4.04 megawatts (MW) of electricity to operate, the achievement of memory by the low-powered human brain speaks of a unique transformation of metabolic energy into mentality. Suffice it so say that comprehending this transformation this is an ongoing effort that engages a vast armada of academic scientists, witness the scientific literature and the many YouTube lectures.

  Our own efforts have been focused on the physiologic basis of memory and emotive states. Rather than addressing the emergence of mental talents as a philosophical problem [12]and to avoid vagueness in language, we define and clarify commonly used terms.


  Synonyms - cognition, consciousness,awareness, thinking. Mentation involves conscious awareness associated with emotive memory.

Sensation or feeling

  Devices, such as video cameras or audio microphones, can detect optical or sound stimuli and store them as information for subsequent replay. However, the decoded information is inherently “demotive”, bereft of psychic qualities.

  By contrast, sensations or feelings detected by the neural net are coincident with psychic states.


  The recall of previously experienced psychic states.Emotive states render meaning to recalled stimuli. Consequently, emotions require a memory function. (More on the mechanism below).


  The term memory is an example of polysemy, as it is applied both to computers and to neural nets. Computer memory is linked to algorithmicprocessing of information in binary format. It is ultimately physical[13], embodied by dopants distributed within an inorganic matrix (i.e. Si) [14]. The information stored in memory chips as bits, is processed by algorithms that compute an “output”. The bit has no emotive quality. Each bit is like the other; none has inherent value/significance. Hence, theprocessed output is “demotive”, without meaning.

  By contrast, neural memory is emotive, as it ultimately affects survival.But the process by which it is realized remains enigmatic. Most neuroscientists ascribe mental processes to electrodynamic signaling between neurons through synapses [15-17]. But objections have been raised as such a model ignores non-synaptic (ephaptic) signaling [18,19]. Also, it does not explain how emotive states are instigated and remembered.


  Refers to our psychological powers of thinking and remembering [20]. It may apply exclusively to humans as it involves the talent for language and logic.

Code Q: What is the “neural code”?

  The technique of coding as applied to computers [21-24], “has enriched conceptions of (neural) memory) processing and considerably broadened the scope of (neural) memory research” [25].Of course, the physical (chemical) character of the encoding effectors [12] reflects the encoding process. To address the required physicality for the neural net, we have proposed that the minimal cognitive unit of information (cuinfo) of neural memory, is realized chemically, as outlined by the tripartite mechanism (Figure 1) [26-29].

Figure 1:Formation of cuinfo complexes with different monovalent and polyvalent metal cations, as well as with different neurotransmitters (NTs), rendered more stable by crosslinking.


  In the tripartite model of neural memory, the individual neuron is surrounded by cuinfo complexes which it “reads” [26-29]. The neural net integrates the contribution of the individual neurons into comprehensive recall. Thus, a working model of how the brain generates memory needs to describe read/write processes that meld physiologic aspects with biochemical processes [30].

(Figure 2)

Figure 2:A chemographic schematic of neurons surrounded by cognitive units of information (cuinfo, ) that the neural net integrates and consolidates into comprehensible memory (not to scale, as the cuinfo are much smaller).

  Operationally, the sensors (i.e. GPCR, K-channels, etc.) which laterally diffuse along the neural membrane (D >5 x 10-3 um2 /sec) [31,32]continuously peruse the exposed cuinfo to generate emotive memory (Figure 3).

Figure 3:A. Lateral view of GPCR mosaics [31] which diffuse along the neural membrane, on the order of 10-3 to 10-1 um2/sec [32,33]. The moving sensors can glancingly recognize (resonate with) the cuinfo. In passing, they recognize the NT content which imposes emotive context to the decoded memory. B. Representation of a K2P channel sensor within membrane of the neuron, “perusing” different cationic moieties of metal-centered cuinfo with its S-S tip, as it traverses the neural membrane.

  Emotive memory is an intrinsic facet of mentation. The example of biology indicates that a minimum of300 neurons (i.e. C. elegans) are required to achievethe emergence of a mental talent, namely memory[34-36].One could consider that the mental talentof emotive memory, evolved along with the increasing complexity of neural interactions [12](Figure 4).

Figure 4:The emergence of ever more complex conscious mental states, such as emotions and memory, correlated with the evolving size and complexity of neural net signaling.


  Electrodynamic signaling is not causative of mentation. Rather, we opine that mentation is rendered operational by chemodynamic processes that occur during the neural net's thinking activity.Effectively, we suggest that the chemo-dynamicresonant signaling process generates the phenomenon of mentation i.e. memory, as schematised in figure 5. The achievement of memory results from chemodynamic play between neurons and their nECM, as per the tripartite mechanism. The electrodynamic signalscouple the chemodynamicmental state to the electrodynamic synaptic signaling system to actuate distalorgans, muscles and glands.

Figure 5:A schema which illustrates the of electro-dynamic and chemo-dynamic signaling relevant to memory.

  We propose that the achievement of mental states in the brain results from two modes of neural signaling, the synaptic andthe ephaptic mode.The synaptic electro-chemical signals are directed from senses to the brain and from the brain to the peripheral nervous system to actuate distal organs, muscles and glands. Mental states such as consciousness and memory emerge from the combined ephaptic and synaptic electro-chemical signaling that occurs between neurons comprising the brain.

  The neural surface is punctated by many varied sensors (GPCR, integrins, etc.), mosaics of proteins which are mobile and capable of sensing the cognitiveinformationencodedwithin the nECMaround the neurons[36-38]. Mood and memory are based on decoding the chemodynamic signals as outlined by the tripartite mechanism.The resonant state achieved by the neural net decoding of cuinfoand its integration is experienced as a conscious (mental) state, of which emotive memory is an intrinsic aspect.


  Like architects who acknowledge the brick with which they construct a house, we consider how emotive memory could be constructed from the resources available to the neural net.

  Resources (substances) • Neural net (>300 neurons) • nECM - cuinfo • Metal cations (~10) • Neurotransmitters (NTs) (>80)

  Mentality is inextricably linked to memory. Itinvolves both “substance” and “process”. The neural circuit integrates and consolidates theephaptic and synaptic signaling contributions of all neurons comprising the net [38-46], to experience memory.The NTs elicit physiologic reactions entangled with psychic states and encodesfeelings into memory that are recalled as “emotions”.Effectively, mind as memory emerges from body.


  By GM: In memorium to my late wife, the artist Georgette Batlle (1940-2009), my muse, the mother of my children, Danae and Jonathan. Thanks to my daughter Danae and to my companion Karine Ahouva Leopold (Jerusalem, Paris) forencouragement and cheers.

  GM CG: We appreciate that Professor Gallistel’s (Rutgers University) remarks on our early manuscriptsdrew our attention to “memory” as the proper focus of our speculations.

Conflict of Interest

  GM is a founder of MX Biotech Ltd., with the commercial goal to develop new“memory materials” and devices.

  CG is an emeritus professor at the Institute of Chemistry, The Hebrew University of Jerusalem. He is active in developing technologies for the conversion of peptides and active regions of proteins into orally available drugs. Notwithstanding, the ideas forwarded here are scientifically genuine and presented in good faith, without commercial clouding of the concepts expressed therein.


  1. Kim J. “Mind in a Physical World”.An Essay on the Mind-Body Problem and Mental Causation.MIT Press, MA (2000).
  2. Block N., et al.“The Nature of Consciousness”. Philosophical Debates.MIT Press, MA (1997).
  3. Simonetta D. “Descartes, Intuition and memory”.XVII Siècle 4 (2017): 1-192.
  4. Ryle G. “The Concept of Mind”. Penguin Books, UK (1949).
  5. Chomsky N. “Reflections on Language”.Pantheon Books, New York (1975).
  6. Rosenfield I. “The Invention of Memory”.Basic Books Inc, New York (1988).
  7. Guidolin D., et al.“Central nervous system and computation”.Quarterly Review of Biology 86 (2011): 265-285.
  8. Gallistel CR and King AP. “Memory and the Computational Brain”.Wiley Blackwell, New York (2009).
  9. Freeman WJ. “The use of codes to connect mental and material aspects of brain function”.Comment on: “Natural world physical, brain operational, and mind phenomenal space-time” by A.A. Fingelkurts AA. Fingelkurts and C.F.H. NevesPhysics of Life Reviews 7 (2010): 260-261.
  10. Panzeri S., et al. “Cracking the neural code for sensory perception by combining statistics, intervention, and behavior”.Neuron 93 (2017): 491-528.
  11. Romanes GJ. “Mental Evolution in Animals”. With Posthumous Essay on Instinct by Charles Darwin.1883Kegan, Paul, Trench and Co., London (1893).
  12. Budd GE. “Early animal evolution and the origins of nervous systems”.Philosophical Transactions of the Royal Society B370 (2015): 20150037.
  13. Ferreira F R M., et al. “The influence of James and Darwin on Cajal and his research into the neuron theory and evolution of the nervous system”. Frontiers in Neuroanatomy (2014).
  14. Landauer R. “Information is physical”. Physics Today (1991): 93-29.
  15. Di Ventra., et al. “Memory materials: a unifying description”. Materials Today14 (2011): 584-591.
  16. Hebb DO. “The Organization of Behavior”.Wiley, New York (1949).
  17. Kandel ER. “In Search of Memory”.W.W. Norton and Co., New York (2006).
  18. Kandel ER., et al. “The molecular and systems biology of memory”.Cell 157 (2014): 163-186.
  19. Arshavsky Y I. “‘The seven sins’’ of the Hebbian synapse: Can the hypothesis of synaptic plasticity explain long-term memory consolidation?”.Progress in Neurobiology 80 (2006): 99-113.
  20. Marx G andGilon C. “The molecular basis of neural memory.Part 10.The sins and redemption of neurobiology”. Journal of Neurology and Neuro Critical Care 1 (2018): 1-7.
  21. Bennett MR. “Development of the concept of mind”. Australian and New Zealand Journal of Psychiatry41 (2007): 943-956.
  22. Jaross W. “Hypothesis on a signalling system based on molecular vibrations of structure formingmacromolecules in cells and tissues”.Integrative Molecular Medicine 2 (2015): 361-364.
  23. Singh S. “The Code Book: The Secret History of Codes and Code-breaking”.Fourth Estate, London (2000).
  24. Shiffman D. “The Nature of Code”.Magic Book Project, New York (2012).
  25. von der Malsburg C. “Concerning the Neuronal Code”.Journal of Cognitive Science 19 (2018): 511-550.
  26. Gardiner JM. “Readings in Human Memory. Pt.2. Dimensions of encoding”.Methuen and Co, Ltd. UK.
  27. Marx G andGilon C. “The molecular basis of memory”.ACS Chemical Neuroscience 3 (2012): 633-642.
  28. Marx G andGilon C. “The molecular basis of memory. MBM Pt 2:The chemistry of the tripartite mechanism”.ACS Chemical Neuroscience 4 (2013): 983-993.
  29. Marx G andGilon C. “The tripartite mechanism as the basis for a biochemical memory engram”.Journal of Integrative Neuroscience 18 (2019): 181-185.
  30. Marx G andGilon C. “The Molecular Basis of Neural Memory. Part 11. Chem-electric Write /Read Processes”. Journal of Neurosurgery and Imaging Techniques 6 (2020): 283-301.
  31. Chang CJ. “Bioinorganic life and neural activity: Toward a chemistry of consciousness?” Accounts of Chemical Research50 (2017): 535-538.
  32. Agnati LF., et al. "On the molecular basis of the receptor mosaic hypothesis of the engram”.Cellular and Molecular Neurobiology 24.4 (2014): 501-516.
  33. Triller A, Choquet D. “Surface trafficking of receptors between synaptic and extrasynaptic membranes:“and yet they do move!””. Trends in Neuroscience 28 (2005): 133-139.
  34. Choquet D and Triller A. “The dynamic synapse”.Neuron 80 (2013): 691-703.
  35. Stein GM and Murphy CT. “C. elegans positive olfactory associative memory is a molecularly conserved behavioral paradigm”.Neurobiology of Learning and Memory 11 (2014)5:86-94.
  36. Katz M andShaham S. “Learning and Memory: Mind over Matter in C. elegans”. Current Biology 29.10 (2019): R365-R367.
  37. Ardiel EL and Rankin CH. “An elegant mind: Learning and memory in Caenorhabditis elegans”.Learning and Memory 17 (2010): 191-201.
  38. von KorffM and Steger M. “Pharmacophore pattern recognition of small molecular ligands”.Journal for Chemical Information and Computer Sciences 44 (2004): 1137-1147.
  39. Robinson P andKaliouby R. “Computation of emotions in man and machines”. Philosophical Transactions of the Royal Society B 364 (2009): 3441-3447.
  40. Fuxe K Dahlström A.,et al. “From the Golgi-Cajal mapping of transmitter-based characterization of the neuronal networks leading to two modes of brain communication: Wiring and volume transmission (VT)”.Brain Research Review 55 (2007): 17-54.
  41. Bhalla US and Iyengar R. “Emergent properties of networks of biological signaling pathways”.Science 283 (1999): 381-389.
  42. Tononi G. “Consciousness as integrated information: A provisional manifesto”.Biological Bulletin 15 (2018): 216-242.
  43. Agnati LF., et al. “Functional roles of three cues that provide non-synaptic modes ofcommunication in the brain: electromagnetic field, oxygen, andcarbon dioxide”.Journal of Neurophysiology 119 (2018): 356-368.
  44. Fuxe K., et al. “Volume transmission and its different forms inthe central nervous system”.Chinese Journal of Integrative Medicine 19 (2013): 323-329
  45. Carvalho GB and Damasio A. “Non-synaptic transmission and the foundations of affect” (2019).
  46. Vizi ES., et al. “Non-synaptic communication in the central nervous system”.Neurochemistry International 45 (2014): 443-451.

Citation: Gerard Marx and Chaim Gilon., “Neural Memory and Mentation”. Acta Scientific Neurology 4.4 (2021): 44-49.

Copyright: © 2021 Gerard Marx and Chaim Gilon., This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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