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Journal Neurocomputers №2 for 2013 г.
Article in number:
Neurobiological mechanisms of subjective perception-II
Authors:
A.V. Sergin, V.Ya. Sergin
Abstract:
The article offers a new outlook on the organization of the processes of human perception. It introduces the concept of inclusive sensory characteristic, which is determined in first article. The sequence of inclusive characteristics forms a hierarchy: from features to unified images and scenes. Specific patterns of electric activity, which map inclusive characteristics, are relayed by feedbacks from upper to lower neuronal levels. Top-down excitation selects neurons populations. These populations can map features of the object from past experience, and this excitation puts the neurons sampled populations in a state which is near to discharge threshold. As a result, neuronal populations at the underlying levels, which are involved in a given act of perception, become, for a short time, coincidence detectors. Hierarchically arranged set of neuronal ensembles of coincidence detectors forms a fast sensory pathway, single and unique for each act of perception. Each processing level ignores noise signals as insignificant, and transfer them a sensory path is not stimulated at the top. The sensory system does not filter the perception and does not suppress the noise, it simply ignores them. Associative properties of inclusive characteristic follow from its definition. Inclusivecharacteristics provide inside and inter-modal connections and generate associative brain function. The hierarchy of inclusive characteristics - is a powerful associative apparatus, which has unlimited associative virtually capacity due to its multidimensional and multilevel. An inclusive characteristic of an object is the summit of the hierarchically arranged set of embedded sensory characteristics. The sensory features of an object may change themselves and thus generate change in the set of the embedded sensory characteristics, but this entire hierarchical structure must rise to the same summit, i.e. to the inclusive characteristic of the object. The brain do not recognize a sensory mapping object on the retina of the eye. The brain detects objective meaning, a key diagram of object, its concept, which do not depend on illumination, neither the size nor on its exposure. This is the true nature of perception invariance. Formation of the inclusive characteristics is the main content of operational processes in allsensory, specialized motor and associative cortical areas and at all processing levels. It is the universal algorithm of a cerebral cortex, its Software, which is implemented in a uniform columnar structure of a cerebral cortex, which is its hardware. The brain has no central processing unit, but its Software - is an algorithm that ensures wholeness of a perception, motor response and proactive behavior. Hierarchy of inclusive characteristics is completed of subjective Self, which is multidimensional, multifaceted and wholeness. The highest inclusive characteristic, forming individual Self, provides a holistic worldview and holistic behavior, and these properties of subjective Self do not need a central processing unit of the brain. The concept of inclusive characteristics allows us to understand psychobiological mechanisms of a wide variety of perception phenomena with common positions, without resorting to additional assumptions for each particular case. The theoretical consequences of the model are diverse character and are formulated in a concrete form that makes them accessible to experimental verification in laboratory conditions.
Pages: 17-25
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