Sökning: "Neuronal Network"

Visar resultat 21 - 25 av 139 avhandlingar innehållade orden Neuronal Network.

  1. 21. Aminergic regulation of neuronal synchrony in the hippocampus

    Författare :Richard Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: Gamma oscillations (25-80 Hz) are physiological electric activity patterns, prevalent in the brain, which are associated with attention, working memory, sensory perception, long-term memory encoding and recall. Importantly, in mental illnesses featuring cognitive disturbances (such as Schizophrenia or Alzheimer’s disease) there are concomitant disturbances of gamma oscillations. LÄS MER

  3. 22. Experimental Studies of BMP Signalling in Neuronal Cells

    Författare :Susanna Althini; Ted Ebendal; Carl-Henrik Heldin; Ingrid Strömberg; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurosciences; Bone Morphogenetic Protein BMP ; Growth Differentiation Factor 10 GDF10 ; Aktivne-receptor Like Kinase 2 ALK2 ; Tyrosine Hydroxylase TH ; Neurotrophic Factor; Neurite Outgrowth; Hippocampus; Catecholamine; PC12; Sympathetic Ganglia; Substantia Nigra SN ; Gene Targeting; Neurovetenskap; Neurology; Neurologi; Developmental Neurosciences; Medicinsk utvecklings- och neurobiologi;

    Sammanfattning : The developing nervous system depends largely on extracellular cues to shape its complex network of neurons. Classically, neurotrophins are known to be important mediators in this process. LÄS MER

  4. 23. Conductance-based principles of neuronal firing and excitability

    Författare :Hugo Zeberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The brain is an electrical organ whose activity is determined by the flow of ions across cell membranes. As such, the conductances that control the ion flux is a key to our understanding of the nervous system. Neurons process information by their ability to rapidly depolarize and fire action potentials. LÄS MER

  5. 24. Mechanisms of rhythm generation in the lamprey locomotor network

    Författare :Lorenzo Cangiano; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Animals propel themselves through space, swimming, walking or flying, by rhythmic oscillatory movements of their body and limbs. In vertebrates these movements are mainly generated by specialized neuronal circuits in the spinal cord, called central pattern generators (CPGs) for locomotion. LÄS MER

  7. 25. Spike-Based Bayesian-Hebbian Learning in Cortical and Subcortical Microcircuits

    Författare :Philip Tully; Anders Lansner; Matthias Hennig; Gordon Pipa; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bayes rule; synaptic plasticity and memory modeling; intrinsic excitability; naïve Bayes classifier; spiking neural networks; Hebbian learning; neuromorphic engineering; reinforcement learning; temporal sequence learning; attractor network; Computer Science; Datalogi;

    Sammanfattning : Cortical and subcortical microcircuits are continuously modified throughout life. Despite ongoing changes these networks stubbornly maintain their functions, which persist although destabilizing synaptic and nonsynaptic mechanisms should ostensibly propel them towards runaway excitation or quiescence. LÄS MER