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  • 1
    Electronic Resource
    Electronic Resource
    Role of the posterior hypothalamus in activity of the ascending activating system (1975)
    Springer
    Bulletin of experimental biology and medicine 80 (1975), S. 851-854 
    Details
    ISSN: 1573-8221
    Keywords: electroencephalography ; hypothalamus ; brain-stem reticular formation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract In chronic experiments on cats after premesencephalic section of the brain stem electrical stimulation of the posterior hypothalamus evoked desynchronization of neocortical electrical activity. After isolated injury to the posterior hypothalamus, moderate electrical stimulation of the medial part of the mesencephalic reticular formation did not evoke any marked activation of the neocortex. The results point to the important role of the hypothalamus in the activity of the ascending activating system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00789252
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  • 2
    Electronic Resource
    Electronic Resource
    The nature of the paradoxical phase of sleep (1970)
    Springer
    Neuroscience and behavioral physiology 4 (1970), S. 1-7 
    Details
    ISSN: 1573-899X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 1. Paradoxical sleep is a complex phenomenon which can be divided into three stages: 1) the stage of general activation, or desynchronization of slow activity in all areas of the brain, 2) the stage of predominance of the hippocampal δ-rhythm and 3) the stage of predominance of the hippocampal ϕ-rhythm. These stages are considered to have their neurophysiological mechanisms subcortically. The stage of general activation would be determined by excitation of the reticular formation, the stage of hippocampal ϕ-rhythm by excitation of the hippocampal centers of motivation, and the stage of hippocampal δ-rhythm by excitation of the hypothalamic centers causing inhibition of drives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01125579
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  • 3
    Electronic Resource
    Electronic Resource
    Preferential ipsilateral influence of the posterior hypothalamus on the neocortex (1977)
    Springer
    Neuroscience and behavioral physiology 8 (1977), S. 9-14 
    Details
    ISSN: 1573-899X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract On the 10th-20th day after precollicular transection of the brain stem weak low-frequency electrical stimulation of the posterior hypothalamus preferentially activates the ipsilateral neocortex. After unilateral injury to the posterior hypothalamus, synchronous activity predominates in the ipsilateral neocortex. In premesencephalic animals weak single electrical stimulation of the posterior hypothalamus evokes the appearance of spindles in ipsilateral zones of the frontal cortex, whereas stronger single stimulation causes the diffuse generation of spindles in various parts of the neocortex. Besides this preferential unilateral effect, the influence of the posterior hypothalamus is found to be more strongly expressed in the frontal than in the occipital cortex. It is postulated that the posterior hypothalamus exerts its influence on the neocortex through the thalamic nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01153593
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanisms of brain-stem activation of the neocortex and motor reflexes in chronic premesencephalic cats (1976)
    Springer
    Neuroscience and behavioral physiology 7 (1976), S. 150-154 
    Details
    ISSN: 1573-899X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract To study the role of brain-stem structures in activation of the neocortex and motor reflexes chronic experiments were carried out on 18 cats. After premesencephalic section of the brain stem neocortical activation arises both spontaneously and in response to stimulation of the posterior hypothalamus or skin of the forelimb. After bilateral destruction of the posterior hypothalamus of these animals neocortical activation developed neither spontaneously nor in response to stimulation of the skin of the forelimb. Excitation of the mesencephalic reticular formation was accompanied by activation of motor reflexes. It is concluded that the posterior hypothalamus, independently of the mesencephalic reticular formation, can activate the neocortex, and that the mesencephalic reticular formation, independently of structures located rostrally, can activate motor reflexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320749
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  • 5
    Electronic Resource
    Electronic Resource
    Characteristics of neuronal activity in prefrontal cortex during performance of spatial delayed reactions in monkeys (1987)
    Springer
    Neuroscience and behavioral physiology 17 (1987), S. 49-55 
    Details
    ISSN: 1573-899X
    Keywords: cortex near sulcus principalis ; spatial delayed reactions ; neuronal activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Several types of neurons were differentiated on the basis of a study of neuronal activity in various parts of the cortex near the sulcus principalis during the execution of spatial delayed reactions by monkeys. It was established that the different types of neurons are represented in different numbers in. different parts of the cortex near the sulcus principalis. The determination of several factors influencing the activity of these neurons and the comparison of data on their quantitative representation in the anterior, middle, and posterior parts of the cortex near the sulcus principalis with the existing behavioral data obtained after local ablations of identical regions of the brain made it possible to postulate that neurons belonging to the different types are involved in the analysis of different processes and represent different functional units.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186807
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of posterior hypothalamic stimulation on neocortical electrical activity in the chronic premesencephalic cat (1976)
    Springer
    Neuroscience and behavioral physiology 7 (1976), S. 292-298 
    Details
    ISSN: 1573-899X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chronic experiments were carried out on 19 adult cats after preliminary division of the brain stem at the level of the anterior border of the superior colliculus. High-frequency electrical stimulation of the posterior hypothalamus of these animals caused desynchronization of electrical activity in different parts of the neocortex. The influence of the posterior hypothalamus was predominantly on activity in the frontal zones of the neocortex. It is postulated on the basis of these results that the posterior hypothalamus has an activating effect on the neocortex through the thalamic nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181835
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  • 7
    Electronic Resource
    Electronic Resource
    Significance of emotional excitation in the mechanisms of spatial short-term memory in lower apes (1987)
    Springer
    Neuroscience and behavioral physiology 17 (1987), S. 43-49 
    Details
    ISSN: 1573-899X
    Keywords: electrodermal ; response ; heart rate ; dynamics of emotional tension ; spatial delayed response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Correlates of variation, in the level of emotional tension are studied in long-term experiments on. adult monkeys. The simultaneous appearance of the electrodermal response and of a change in the heart rate is shown to reflect more accurately a rise in the level of emotional tension. Continuous recording of autonomic indexes reveals an increase in tension level during the presentation of conditioned signals and the performance of the motor response in the spatial delayed response test program. The emotiogenic structures are thought to influence the specific mechanisms of short-term memory during the presentation of. conditioned signals and the performance of food-procuring instrumental behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186806
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