Desenvolvimento pós-natal do EEG em cães normais: avaliação visual qualitativa e quantitativa até 45 dias de vida
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Data
2004
Autores
Paula, Luciana Felício de [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O desenvolvimento eletrocortical após o nascimento tem sido investigado em várias espécies, principalmente na humana. Muitos elementos do eletroencefalograma (EEG) que ocorrem no desenvolvimento neonatal ainda não foram determinados em cães. O presente trabalho analisou o desenvolvimento eletrocortical de cães normais no período compreendido do primeiro aos 45 dias de idade. Foram estudados 182 traçados do EEG de 26 cães sem raça definida, com intervalos semanais (sete momentos), obtidos em sono espontâneo para análise visual quantitativa e qualitativa, feitas por dois examinadores independentes sem prévio conhecimento do período registrado. Utilizou-se um eletroencefalógrafo convencional de oito canais com montagens mono e bipolar. Os registros nas 24 horas e no sétimo dia de idade mostraram um padrão de traçado descontínuo, com trechos com surtos de 4,3 a 8,3s caracterizados por aparecimento de atividade cortical (3 a 15Hz e 28 a 35mV) e intervalos intersurtos de 2 a 5s caracterizados por atenuação total ou parcial da atividade cortical. Observaram-se trechos com surtos de atividade alfa-beta fuso-like (12-15Hz) registrados principalmente durante o sono ativo. O sono quieto foi registrado com pouca ou nenhuma interferência de movimentos fásicos repentinos generalizados e de movimento lento dos olhos. O desenvolvimento eletrocortical de cães neonatos ocorre de forma gradual e as primeiras mudanças significativas ocorrem com 14 dias de vida com caracterização do sono NREM através dos grafoelementos e aumento de ondas lentas. Após 28 dias há aumento progressivo das ondas lentas e aparecimento do último tipo de sono NREM, sono IV, e aumento crescente dos trechos em vigília. Finalmente com 45 dias de vida, as ondas lentas do sono NREM de alta voltagem, a apresentação de grande quantidade de microdespertar e traçados caracterizando... .
The eletrocortical developmental after birth in various species have been done mainly in human. Many elements of the electroencephalogram (EEG) still were not determined. This work analysed the electrocortical developmental from normal young dogs from first to 45 days of age. Were studied 182 EEG from 26 mongrel dogs, at weekly intervals (seven moments), obtained in espontneous sleep to quantity and quality visual analyses, dones by two independents researchers with no previous known from the registred period. A 8-channel conventional electroncephalography was used with mono and bipolar placement. The registrations in the 24 hours and in the 7o day after birth showed a pattern of traced interrupted with parts of outbreak of 4,3 a 8,3s caracterizing the appearence of cortical activity (3 a 15Hz and 28 a 35mV) and intervals between outbreaks of 2 to 5s caracterized for parcial or total atenuation from cortical actvity. In this period was observed parts with outbreaks of activity alfa-beta fuso-like (12-15Hz) registrated principaly during the active sleep. The quiet sleep was registrated with a electrograph pattern of actvity with few or neither interference of generality abrupt fasics movements and the slow movement of eyes. The electrocortical developmental in dogs occurs in a gradual form and the changes significantly occur with 14 days after birth caracterizing sleep NREM trough grafoelements and increase in slow waves. After 28 days with progressive increase of slow waves and appearence of the latest type of sleep NREM, sleep IV, and constant increase of vigils segments. Finaly with 45 days after birth slow, large waves of sleep NREM, presentation of a great quantity of micro awakes; caracterized traces of instability in the maintenance of the sleep and registred of more time in vigil that caracterized a greatest maturity compared with the... (Complete abstract, click electronic address below).
The eletrocortical developmental after birth in various species have been done mainly in human. Many elements of the electroencephalogram (EEG) still were not determined. This work analysed the electrocortical developmental from normal young dogs from first to 45 days of age. Were studied 182 EEG from 26 mongrel dogs, at weekly intervals (seven moments), obtained in espontneous sleep to quantity and quality visual analyses, dones by two independents researchers with no previous known from the registred period. A 8-channel conventional electroncephalography was used with mono and bipolar placement. The registrations in the 24 hours and in the 7o day after birth showed a pattern of traced interrupted with parts of outbreak of 4,3 a 8,3s caracterizing the appearence of cortical activity (3 a 15Hz and 28 a 35mV) and intervals between outbreaks of 2 to 5s caracterized for parcial or total atenuation from cortical actvity. In this period was observed parts with outbreaks of activity alfa-beta fuso-like (12-15Hz) registrated principaly during the active sleep. The quiet sleep was registrated with a electrograph pattern of actvity with few or neither interference of generality abrupt fasics movements and the slow movement of eyes. The electrocortical developmental in dogs occurs in a gradual form and the changes significantly occur with 14 days after birth caracterizing sleep NREM trough grafoelements and increase in slow waves. After 28 days with progressive increase of slow waves and appearence of the latest type of sleep NREM, sleep IV, and constant increase of vigils segments. Finaly with 45 days after birth slow, large waves of sleep NREM, presentation of a great quantity of micro awakes; caracterized traces of instability in the maintenance of the sleep and registred of more time in vigil that caracterized a greatest maturity compared with the... (Complete abstract, click electronic address below).
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Neonatologia veterinária, Cão
Como citar
PAULA, Luciana Felício de. Desenvolvimento pós-natal do EEG em cães normais: avaliação visual qualitativa e quantitativa até 45 dias de vida. 2004. 144 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, 2004.