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

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Presentation on theme: "Basic Bits of Neuronal Grammar Friedemann Pulvermüller MRC Cognition and Brain Sciences Unit Cambridge."— Presentation transcript:

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 I 3 word input congruent with the network structure

9 The sentence “Betty get up” will appear in the input and will not be accepted by the network

10 Time step / Input / Process

11 0--All webs at rest

12 1BettyIgnition of word web

13 2--Priming of SD

14 3--Priming of SD

15 4--Priming of word web

16 5getsPrimed 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 10upIgnition 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

32 II 3 word input incongruent with the network structure

33 The sentence “Up get Betty” will appear in the input and will not be accepted by the network

34 Time step / Input / Process

35 0--All webs at rest

36 1upIgnition of word web

37 2----

38 3----

39 4getUnprimed ignition I^ of word web

40 5-- Priming of SD Threshold regulation

41 6--Priming of SD

42 7--Priming of SD

43 8BettyUnprimed ignition I^ of word web

44 9--Priming of SD Threshold regulation

45 10--Priming of SD

46 11--Priming of SD

47 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.

48

49 III 3 word input partly incongruent with the network structure

50 The sentence “Up Betty get” will appear in the input and will not be accepted by the network

51 Time step / Input / Process

52 0--All webs at rest

53 1upIgnition of word web

54 2----

55 3----

56 4BettyUnprimed ignition I^ of word web

57 5--Priming of SD Threshold regulation

58 6BettyPriming of SD

59 7--Priming of word web

60 8getPrimed ignition of word web

61 9--Priming of SD Backward ignition

62 10--Priming of SD Backward ignition

63 11--Backward ignition

64 12----

65 At time step 12, not all of the 3 string acceptance criteria were met: 2 out of the 3 activated word webs were visible (i.e., reverberated at the highest reverberation level). Only 1 out of 3 word webs were satisfied (i.e., their set of sequence detectors reverberated at a high level). Only 2 out of the 3 word webs were synchronized (I.e., participated in a continuous wave of ignitions).


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