TY  - JOUR
AU  - Tirsch, W.S.
AU  - Keidel, M.*
AU  - Perz, S.
AU  - Scherb, H.
AU  - Sommer, G.*
C1  - 21216
C2  - 19315
SP  - 1-14
TI  - Inverse covariation of spectral density and correlation dimension in cyclic EEG dynamics of the human brain.
JO  - Biol. Cybern.
VL  - 82
PY  - 2000
SN  - 0023-5946
ER  - 

TY  - JOUR
AU  - Arnoldi, M.
AU  - Englmeier, K.-H.
AU  - Brauer, W.*
C1  - 20887
C2  - 19297
SP  - 433-447
TI  - Translation-invariant pattern recognition based on synfire chains.
JO  - Biol. Cybern.
VL  - 80
PY  - 1999
SN  - 0023-5946
ER  - 

TY  - JOUR
AB  - Holographic brain models are well suited to describe specific brain functions. Central nervous systems and holographic systems both show parallel information processing and non-localized storage in common. To process information both systems use correlation functions suggesting to develop cybernetic brain models in terms of holography. Associative holographic storage is done with two simultaneously existing patterns. They may reconstruct each other mutually. Time-sequentially existing patterns are connected to associative chains, if every two succeeding patterns do exist within a common period of time in order to be stored in pairs. Read out (recall) of associative chains - reconstructing coupled patterns which didn't exist simultaneously - requires advanced holographic techniques. Three different methods are described and tested experimentally. The underlying principles are feedback mechanisms, nonlinearities of the storage material and tridimensional architecture of the voluminous recording medium. Those principles evidently occur in neural storage systems supporting analogous information processing in neural- and holographic systems.
AU  - Wess, O.J.
AU  - Roeder, U.
C1  - 41101
C2  - 37935
SP  - 89-98
TI  - A holographic model for associative memory chains.
JO  - Biol. Cybern.
VL  - 27
IS  - 2
PY  - 1977
SN  - 0023-5946
ER  - 

TY  - JOUR
AB  - As regards the regeneration of nervous impulses the controlling mechanism of the excitable membrane can be reduced essentially to the following two membrane properties: 1. There is a fixed voltage interval where the two different positive conductivities of the membrane change over continuously. In this transition region if the membrane potential is more positive the current-voltage characteristic shows a negative differential resistance. This characteristic may be measured under steady-state conditions in the presence of the particular ions (K., Rb., and during veratridine-poisoning also Na., Li., NH4 ., C(NH2)3 .) acting as charge carriers during excitation. 2. In addition Na.-K.-selectitivity is observed which effects a faster penetration of Na. than of K. through the membrane. At present the molecular basis of both properties is unknown. But each property can be changed independently of the other. Physicochemical means (e.g., variation of pH, osmolarity, solvent, concentration of bivalent cation) act unpon the shape of the current-voltage relation by shifting the transition region, while the selectivity is changed by the presence of pharmacological agents (local anaesthetics such as cocain, tetrodotoxin, veratridine). So it may be advantageous to localize and characterize the action on membrane structure common to all members of each group of agents in order to approach the molecular origin of the basic membrane properties.
AU  - Müller-Mohnssen, H.
C1  - 41127
C2  - 37901
SP  - 207-221
TI  - Die Impulsregeneration bei der Signalfortleitung in markhaitigen Nervenfasern.
JO  - Biol. Cybern.
VL  - 7
IS  - 6
PY  - 1970
SN  - 0023-5946
ER  -