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Doctoral Thesis
DOI
https://doi.org/10.11606/T.5.2008.tde-29012009-094621
Document
Author
Full name
Andréa Yoon Choi
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2008
Supervisor
Committee
Sameshima, Koichi (President)
Cairasco, Norberto Garcia
Schochat, Eliane
Silva, Maria Thereza de Araujo
Xavier, Gilberto Fernando
Title in Portuguese
Caracterização dos efeitos da estimulação elétrica no núcleo basalis magnocelular no potencial de campo local e na freqüência cardíaca no condicionamento comportamental de ratos Wistar
Keywords in Portuguese
Acetilcolina
Córtex auditivo
Freqüência cardíaca
Núcleo basal de Meynert
Potencial evocado
Ratos Wistar
Abstract in Portuguese
Estudamos os efeitos da estimulação elétrica no nucleus basalis magnocelular (Meynert), núcleo colinégico que projeta aferências para o córtex cerebral e tem sido associado a mecanismos de aprendizagem e memória. Verificamos os efeitos eletrofisiológicos induzidos pela estimulação elétrica do núcleo basalis pareado com apresentação de um tom puro. Caracterizamos a dinâmica da atividade elétrica neural do cortex auditivo primário e de núcleos subcorticais relacionados à circuitaria da aprendizagem e memória, durante o condicionamento auditivo nos momentos de aquisição e de revocação além correlacioná-las a dinâmica de freqüência cardiaca, variável que pode exprimir a relevância de um estímulo
Title in English
Characterization of nucleus basalis magnocelular electrical stimulation effects on local field potential and heart rate in behavioral conditioning Wistar rats
Keywords in English
Acetylcholine
Auditory cortex
Basal nucleus of Meynert
Event-related potentials
Heart rate
Rats Wistar
Abstract in English
Acetilcholine is related to learning and memory and is related to cortical activation. We studied the effects electrically stimulating the basal forebrain - the main cholinergic afferent to the cortex, while presenting paired and unpaired pure tones. Mathematical techniques were used to analyze electrophysiological data. The dynamics from primary auditory cortex and related subcortical nuclei were correlated to the auditory conditioning. We also correlated brain activity to the heart dynamics, considered a reliable measure of learning and conditioning, an interesting approach that uncovers the relevance of stimulus that is not detectable through other behavioral variables
 
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andreatese2_total.pdf (3.34 Mbytes)
Publishing Date
2009-02-13
 
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