Brain Plasticity and Behavior in the Functions Mediated by Those Bryan Kolb,1 Robbin Gibb, and Terry E
CURRENT DIRECTIONS IN PSYCHOLOGICAL SCIENCE must be some corresponding change Brain Plasticity and Behavior in the functions mediated by those Bryan Kolb,1 Robbin Gibb, and Terry E. Robinson networks. For the investigator inter- ested in understanding the factors Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, that can change brain circuits, and Alberta, Canada (B.K., RG.), and Department of Psychology, University of Michigan, Ann Arbor, Michigan (T.E.R.) ultimately behavior, a major chal- lenge is to find and to quantify the changes. In principle, plastic changes in neuronal circuits are likely to re- ganisms, such as the tiny worm C. Abstract flect either modifications of exist- elegans, whose nervous system has Although the brain was once ing circuits or the generation of only 302 cells. When the nervous seen as a rather static organ, it is new circuits. But how can research- system changes, there is often a now clear that the organization ers measure changes in neural cir- correlated change in behavior or of brain circuitry is constantly cuitry? Because neural networks psychological function. This behav- changing as a function of expe- are composed of individual neu- ioral change is known by names rience. These changes are re- rons, each of which connects with a such as learning, memory, addiction, ferred to as brain plasticity, subset of other neurons to form in- maturation, and recovery. Thus, for and they are associated with terconnected networks, the logical example, when people learn new functional changes that include place to look for plastic changes is motor skills, such as in playing a phenomena such as memory, at the junctions between neurons, musical instrument, there are plas- addiction, and recovery of that is, at synapses.
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