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- W1838245412 abstract "The chapter discusses the phenomenological aspects of spreading depression (SD), excitation, propagation, and cellular changes during spreading depression. Spreading depression appears to be a neuronal reaction of the apical dendrites of pyramidal cells that is triggered by a component released from depressed neurons, which in turn excites contiguous neurons. SD is neuronal in nature, and there are many indications that the apical dendrites are preferentially involved. The participation of neuroglia is problematical, and changes in blood vessels appear to be concomitant events. The phenomenon is found in tissues other than neocortex, including the retina; this indicates that no special neural organization is required. According to the contiguity theory of transmission, potassium or a special substance, which may be glutamic acid, is released from depressed cells to excite nearby neurons. Conditions are most favorable for SD excitation and spread where there is a close proximity of neurons, most predominant in the molecular layer where apical dendrites interdigitate. Transmission of SD appears normally to spread preferentially in the uppermost layers. Propagation of SD can also occur in the layers of the upper half of the cortex, where dendrites and their interdigitation are present to a lesser extent." @default.
- W1838245412 created "2016-06-24" @default.
- W1838245412 creator A5061860950 @default.
- W1838245412 date "1962-01-01" @default.
- W1838245412 modified "2023-10-16" @default.
- W1838245412 title "The Nature of Spreading Depression in Neural Networks" @default.
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