Enriched and Impoverished Environments: Effects on Brain and by Michael J. Renner

By Michael J. Renner

Enriched and Impoverished Environments: results on mind andBehaviour is the newest overview of the lively sector of neuronal plasticity. The query of the way adventure is recorded is key to psychology; speculations and investigations in regards to the position of the mind during this strategy have entered a very interesting section as of the overdue 1980's. Manipulations of environmental complexity is without doubt one of the earliest equipment used in the examine of neural plasticity. This monograph organizes the facts to this point about the responsiveness of neural and behavioural structures to exterior manipulation of our environment. extra attention is given to the problems of causation of the final results of atmosphere on mind and behaviour.

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1961), is that supported EC and IC by the respond differently to manipulation of level of food deprivation, of Juraska, et threshold al. than EC (1983) that IC rats (under metrazol, show lower convulsion in stroboscopic lighting conditions, but not in dim steady light), and of Van Woerden (1986), is than lems. that the performance of EC that of IC by irrelevant cues Rose, et al. (1986) also rats less disrupted in discrimination probreport that spontaneous barpressing rates (with no barpressing contingency other than the mechanical noises associated with depressing the bar) are reliably lower in EC than IC rats.

Weaning rat pups confounded these Morimoto (1970) at 19 days of in whole the brain norepinephrine Their procedure of age may, however, results by stressing the pups. have Riege and found increased norepinephrine in the cortex of EC rats along with a decrease in the hypothalamus-caudate complex, zero. producing a whole brain net change of approximately Dopamine levels showed a similar pattern of change, while serotonin was slightly (but significantly) reduced in a cortex-only sample. There is transmitter quite good evidence, tissue rapidly however, concentrations postmortem by that are monoamine neuro- substantially altered continued enzymatic activity, raising some doubt as to the trustworthiness of findings Jrom studies employing sacrifice techniques and procedures that that tion of existing transmitters.

Did not find group differen- in taste-aversion learning in rats, showed the although of be Warren (1985) facilitated by enrich- but not changed on several discrimination memory for location of water in an arena, and reversal, spatial discrimina- tion and reversal). While there animals to is a preponderance outperform their interpret variety of this in goal box investigators protocol Woods, to Fiske of EC differences attempts difference Woods and rats have (1959) resulted found performance that in a EC-IC decreased than with eating.

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