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Basic Bits of Neuronal Grammar

This work by Friedemann Pulvermüller from the MRC Cognition and Brain Sciences Unit explores neuronal grammar with a focus on activity states in language processing. Key states include ignition, reverberation, priming, and rest, illustrating how words and their features interact within neuronal networks. Examples are provided to demonstrate the criteria for string acceptance in sentences like "Betty gets up" versus "Up gets Betty," showcasing the dynamics of word webs and sequence detectors. The interconnectedness of neuronal activity emphasizes the complexity of language comprehension and production.

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Basic Bits of Neuronal Grammar

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  1. Basic Bits of Neuronal Grammar Friedemann Pulvermüller MRC Cognition and Brain Sciences Unit Cambridge

  2. Activity states: • Ignition -- full activation, momentary • Reverberation -- continuous enhanced activity following ignition • Priming -- “parasitic” activity caused by strongly connected sets • Rest -- inactivity

  3. Activity states: • Darker colours denote reduced activity states

  4. The network:

  5. The represented elements: WORDS SEQUENCE FEATURES

  6. The representing elements: WORD WEBS

  7. The representing elements: WORD WEBS SEQUENCE DETECTORS (SDs)

  8. I3 word inputcongruent with thenetwork structure

  9. The sentence“Betty get up”will appear in the inputand will not be acceptedby the network

  10. Time step / Input / Process

  11. 0 -- All webs at rest

  12. 1 Betty Ignition of word web

  13. 2 -- Priming of SD

  14. 3 -- Priming of SD

  15. 4 -- Priming of word web

  16. 5 gets Primed ignition of word web

  17. 6 -- Priming of SDs Backward ignition

  18. 7 -- Priming of SDs Backward ignition

  19. 8 -- Priming of word web Backward ignition

  20. 9 -- --

  21. 10 up Ignition of word web

  22. 11 -- Backward ignition

  23. 12 -- Backward ignition

  24. 13 -- Backward ignition

  25. 14 -- Backward ignition

  26. 15 -- Backward ignition

  27. 16 -- Backward ignition

  28. 17 -- Backward ignition

  29. 18 -- Deactivation

  30. At time step 17, the 3 criteria for string acceptance were met: • All activated word webs were visible (i.e., reverberated at the highest reverberation level). • All activate word webs were satisfied (i.e., their set of sequence detectors reverberated at a high level). • All active sets were synchronized (I.e., participated in a continuous wave of ignitions).

  31. II3 word inputincongruent with thenetwork structure

  32. The sentence“Up get Betty”will appear in the inputand will not be acceptedby the network

  33. Time step / Input / Process

  34. 0 -- All webs at rest

  35. 1 up Ignition of word web

  36. 2 -- --

  37. 3 -- --

  38. 4 get Unprimed ignition I^ of word web

  39. 5 -- Priming of SD Threshold regulation

  40. 6 -- Priming of SD

  41. 7 -- Priming of SD

  42. 8 Betty Unprimed ignition I^ of word web

  43. 9 -- Priming of SD Threshold regulation

  44. 10 -- Priming of SD

  45. 11 -- Priming of SD

  46. At time step 10, the 3 criteria for string acceptance were not met: • Only 1 word web was visible (the 2 others were at lower activity levels, R2 and R3; cf. darker colours). • No one of the 3 word webs was satisfied (SDs did not reverberate). • No final synchronization process.

  47. III3 word inputpartlyincongruent with thenetwork structure

  48. The sentence“Up Betty get”will appear in the inputand will not be acceptedby the network

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