| Donald Hebb; Organization of Behavior (1949) | |||||||||||||||||||||||||||
| Book | Page | Topic | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 1 | This book presents a theory of behavior that is based as far as possible on the physiology of the nervous system, and makes a sedulous attempt to find some community of neurological and psychological conceptions. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 59 | The present argument is based at least as much on Gestalt as on learning theory. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 60 | 4. First Stage of Perception -- Growth of the Assembly | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 60 | Assumption: -- A growth process accompanying synaptic activity makes the synapse more readily traversed. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 60 | Let us assume that the persistence or repetition of a reverberatory activity (or "trace") tends to induce lasting cellular changes that add to its stability. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 62 | When an axon of cell A. is near enough to excite a cell B and repeatedly or persistently takes part in firing it, some growth process or metabolic change takes place in one or both cells such that A's efficiency, as one of the cells firing B, is increased. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 62 | The most obvious and I believe much the most probable suggestion concerning the way in which one cell could become more capable of firing another is that synaptic knobs develop and increase the area of contact between the afferent axon and efferent soma. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 63 | When one cell repeatedly assists in firing another, the axon of the first cell develops synaptic knobs (or enlarges them if they already exists) in contact with the soma of the second cell. This seems to me the most likely mechanism of a lasting effect of reverberatory action. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 64 | Relationships between synaptic knobs and the cell body. (Diagram) | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 66 | It is feasible to assume that synaptic knobs develop with neural activity and represent lower synaptic resistance. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 68 | Illustrating convergence of cells in Brodmann's area 17 upon cells in area 18. (diagram) | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 69 | Mode of perceptual integration -- the cell assembly | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 69 | Perception must depend on other structures besides area 17. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 69 | At the level of area 18 and beyond, all topographical organization in the visual process has disappeared. | |||||||||||||||||||||||||
| Hebb; Organization of Behavior | 70 | Any two cells or systems of cells that are repeatedly active at the same time will tend to become "associated," so that activity in one facilitates activity in the other. | |||||||||||||||||||||||||
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