Search for dissertations about: "cortical microcircuit"

Showing result 1 - 5 of 6 swedish dissertations containing the words cortical microcircuit.

  2. 1. Active Memory Processing on Multiple Time-scales in Simulated Cortical Networks with Hebbian Plasticity

    Author : Florian Fiebig; Anders Lansner; Tim Vogels; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Working memory; Long-term memory; consolidation; spiking; neural network; BCPNN; cortical microcircuit; Tillämpad matematik och beräkningsmatematik; Applied and Computational Mathematics; Biological Physics; Biologisk fysik;

    Abstract : This thesis examines declarative memory function, and its underlying neural activity and mechanisms in simulated cortical networks. The included simulation models utilize and synthesize proposed universal computational principles of the brain, such as the modularity of cortical circuit organization, attractor network theory, and Hebbian synaptic plasticity, along with selected biophysical detail from the involved brain areas to implement functional models of known cortical memory systems. READ MORE

  4. 2. Aspects of memory and representation in cortical computation

    Author : Martin Rehn; Anders Lansner; Örjan Ekeberg; Peter Földiák; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cerebral cortex; neural networks; attractor memory; sequence learning; biological vision; generative models; serial order; computational neuroscience; dynamical synapses; Computer science; Datalogi;

    Abstract : Denna avhandling i datalogi föreslår modeller för hur vissa beräkningsmässiga uppgifter kan utföras av hjärnbarken. Utgångspunkten är dels kända fakta om hur en area i hjärnbarken är uppbyggd och fungerar, dels etablerade modellklasser inom beräkningsneurobiologi, såsom attraktorminnen och system för gles kodning. READ MORE

  5. 3. The role of striatal inhibition in the processing of cortical neuronal avalanches

    Author : Andreas Klaus; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The brain is spontaneously active even in the absence of any obvious motor actions or sensory perceptions. This so-called resting activity or ongoing activity reflects the myriads of neuronal interactions necessary for the brain to process past actions, allow for current inputs, and prepare for future decisions and responses. READ MORE

  6. 4. Neocortical layer 2/3 microcircuits

    Author : Carl Holmgren; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Neocortical microcircuit; layer 2 3; pyramidal cell; FSN interneuron; retrograde signaling; VGLUT3; spike-timing dependent plasticity; LTP; LTD.;

    Abstract : Pairs of interconnected neurons form elementary information processing units within neocortical microcircuits. Pyramidal cells within these microcircuits receive synaptic input, both from their connected partners, and from more distant cortical and sub-cortical regions. Consequently, they require a means to identify relevant synaptic signals. READ MORE

  7. 5. Synaptic plasticity in local networks of neocortical layer 2/3

    Author : Misha Zilberter; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Neocortical microcircuit; layer 2 3; pyramidal cell; spike timing- dependent plasticity; LTP; LTD; FSN interneuron; retrograde signalling; SAT2;

    Abstract : The neocortex is a hierarchal organ in which information processing takes on place on many levels, from subcellular signalling all the way to neural networks. Neocortical local neuronal networks (microcircuits), composed of interconnected neurons, form elementary information processing units within the cortex. READ MORE