Induction of a physiological memory in the cerebral cortex by stimulation of the nucleus basalis.
AUTOR(ES)
Bakin, J S
RESUMO
Auditory cortical receptive field plasticity produced during behavioral learning may be considered to constitute "physiological memory" because it has major characteristics of behavioral memory: associativity, specificity, rapid acquisition, and long-term retention. To investigate basal forebrain mechanisms in receptive field plasticity, we paired a tone with stimulation of the nucleus basalis, the main subcortical source of cortical acetylcholine, in the adult guinea pig. Nucleus basalis stimulation produced electroencephalogram desynchronization that was blocked by systemic and cortical atropine. Paired tone/nucleus basalis stimulation, but not unpaired stimulation, induced receptive field plasticity similar to that produced by behavioral learning. Thus paired activation of the nucleus basalis is sufficient to induce receptive field plasticity, possibly via cholinergic actions in the cortex.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=38311Documentos Relacionados
- Induction of behavioral associative memory by stimulation of the nucleus basalis
- Regulation of the intracellular free calcium concentration in acutely dissociated neurones from rat nucleus basalis.
- A synaptic basis for memory storage in the cerebral cortex
- Lesions of the nucleus basalis magnocellularis induced by 192 IgG-saporin block memory enhancement with posttraining norepinephrine in the basolateral amygdala
- Conditioned Reflexes. An Investigation of the Physiological Activity of the Cerebral Cortex