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Dive into the research topics where Gabriela Augusta Mateus Pereira is active.

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Featured researches published by Gabriela Augusta Mateus Pereira.


Brain Research | 2007

Plastic changes induced by neonatal handling in the hypothalamus of female rats.

Elisa C. Winkelmann-Duarte; Anelise Schindler Todeschin; Marilda da Cruz Fernandes; Lisandra C. Bittencourt; Gabriela Augusta Mateus Pereira; Vinícius Samios; Artur Francisco Schumacher Schuh; Matilde Achaval; Léder Leal Xavier; Gilberto Luiz Sanvitto; Carlos Alberto Mandarim-de-Lacerda; Aldo Bolten Lucion

Early-life events can exert profound long-lasting effects on several behaviors such as fear/anxiety, sexual activity, stress responses and reproductive functions. Present study aimed to examine the effects of neonatal handling on the volume and number of cells in the hypothalamic paraventricular nucleus (pPVN, parvocellular and mPVN, magnocellular regions) and the supraoptic nucleus (SON) in female rats at 11 and 90 days of age. Moreover, in the same areas, immunohistochemistry for oxytocin (OT) and glial fibrillary acidic protein (GFAP) were analyzed in the adult animals. Daily handling during the first 10 postnatal days reduced the number of cells in the pPVN and SON at both the 11 and 90 days. Handling decreased the number of OT-positive parvocellular cells in the PVN in adult females. No significant differences were detected on the optical density (OD) of GFAP-positive cells between the handled and nonhandled adult females. The effect of handling on cell loss was observed 24 h after the 10-day handling period and persisted into adulthood, indicating a stable morphological trace. Results suggest that neonatal handling can induce plastic changes in the central nervous system.


International Journal of Morphology | 2011

Nutrient Foramina in the Upper and Lower Limb Long Bones: Morphometric Study in Bones of Southern Brazilian Adults

Gabriela Augusta Mateus Pereira; Paulo Tadeu Campos Lopes; A. M. P. V Santos; F. H. S Silveira

El importante aporte de sangre para los huesos largos se produce a traves de las arterias nutricias, que penetran por los foramenes nutricios. Este suministro es esencial durante el periodo de crecimiento, las primeras fases de osificacion y en los procedimientos como injertos oseos, resecciones tumorales, traumas, pseudoartrosis congenita y en las tecnicas de trasplante en ortopedia. El estudio determina la ubicacion y el numero de foramenes nutricios en las diafisis de 885 huesos largos de los miembros superiores e inferiores pertenecientes a individuos adultos. Fueron estudiados 174 humeros, 157 radios, 146 ulnas, 152 femures, 142 tibias y 114 fibulas. La ubicacion de los foramenes nutricios era predominante en la parte anterior de la diafisis de los huesos largos del miembro superior y en la parte posterior de los huesos largos del miembro inferior. La mayoria de los huesos estudiados tenia un solo foramen nutricio, representando una sola fuente de suministro de sangre. El indice medio foraminal en los huesos del miembro superior fue de 55,2% para el humero, 35,7% para el radio, y 37,9% para el ulna; en los huesos del miembro inferior fue 43,7% para el femur, 32,7% para la tibia y 46,1% para la fibula. Este estudio registro datos relativos a la poblacion del Sur de Brasil, proporcionando antecedentes etnicos que ademas puedan servir de ayuda en los procedimientos quirurgicos y en la interpretacion de imagenes radiologicas.


International Journal of Morphology | 2012

Morphometric Analysis Related to the Transcondylar Approach in Dry Skulls and Computed Tomography

Gabriela Augusta Mateus Pereira; Paulo Tadeu Campos Lopes; A. M. P. V Santos; R. D Duarte; L Piva; Adriane Pozzobon

El acceso transcondilar (AT)ha sido utilizado comoun procedimiento quirurgico para lesiones cercanas al foramen magnum(FM)y se realizadirectamente a traves delcondilooccipital (CO)o por medio delas porciones atlanto-occipitalconjuntay adyacentesde lamisma.El objetivo del presenteestudio fue examinarlas variaciones anatomicas relacionadas con el AT mediantelos parametros morfometricos del FM, CO y el canal delhipogloso (CH) en craneossecos y tomografia computadorizada (CT). En 111 craneos fueron examinadas las caracteristicasdel CH y tomadas medidas relacionadas con el FM, CO y CH. En la CT, las mediciones se obtuvieron de forma bilateral en10 pacientes que se sometieron a examen de la base del craneo en corte axial helicoidal de 1mm de espesor. Las medidas tomadas fueron las distancias: de la mitad exterior del clivus a la apertura del CH; de la parte inferior de las emisiones de CO a la mitad del CH; de la mitad interna del clivus a la apertura intracraneal del CH y hasta el punto medio del CH; de la apertura extracraneal del CH a la parte inferior de las emisiones de CO y hasta la mitad exterior del clivus. Los resultados de las mediciones de CT son consistentes con estudios previos de los cambios morfometricos en relacion con AT, sin diferencia significativa entre las mediciones obtenidas en el lado derecho e izquierdo y ni en relacion con el sexo. Los datos obtenidos a traves de imagenes en tres dimensiones de CT son importantes para evaluarlas variaciones morfometricas de pre-quirurgicos en el AT.


International Journal of Morphology | 2011

Morphometric Analysis of the Greater Palatine Foramen in Dry Southern Brazilian Adult Skulls

Paulo Tadeu Campos Lopes; A. M. P. V Santos; Gabriela Augusta Mateus Pereira; V. C. B. D Oliveira

El foramen palatino mayor (FPM) da paso al nervio palatino mayor, responsable por la inervacion de la region posterior del paladar. El conocimiento morfometrico del FPM es importante en las intervenciones anestesicas requeridas durante los procedimientos quirurgicos maxilofaciales. El objetivo de este estudio fue evaluar la ubicacion y la forma del FPM en craneos de individuos adultos del Sur de Brasil. Se estudiaron 65 craneos de hombres y 29 de mujeres, midiendose la distancia desde el centro del FPM al plano mediano (PM) y al margen posterior del paladar duro (MPPD), utilizandose un caliper digital y una regla milimetrica. La distancia promedio de FPM-PM en los lados derecho e izquierdo de los craneos de hombres fue de 15,6 mm y 15,4 mm, respectivamente, y en los craneos de mujeres, fue de 15,63 mm en el lado derecho y 15,47 mm en el izquierdo. La distancia media de FPM-MPPD en el lado derecho fue de 3,5 mm en craneos de hombres y 3,1 mm en craneos de mujeres y en el lado izquierdo de 3,6 mm y 3,2 mm en craneos de hombres y mujeres, respectivamente. La prueba t de Student no mostro diferencias significativas en los promedios de las dos distancias (FPM-PM y FPM-MPPD), comparando sexos y lados. La forma ovoide del FPM fue predominante, seguida de las formas de hendidura y redonda. Este estudio proporciona comparaciones de datos etnicos, que pueden ayudar a la clinica en anestesia oral y maxilofacial.


Radiologia Brasileira | 2014

Celiac plexus block: an anatomical study and simulation using computed tomography

Gabriela Augusta Mateus Pereira; Paulo Tadeu Campos Lopes; Ana Maria Pujol Vieira dos Santos; Adriane Pozzobon; Rodrigo Dias Duarte; Alexandre da Silveira Cima; Ângela Massignan

Objective To analyze anatomical variations associated with celiac plexus complex by means of computed tomography simulation, assessing the risk for organ injury as the transcrural technique is utilized. Materials and Methods One hundred eight transaxial computed tomography images of abdomen were analyzed. The aortic-vertebral, celiac trunk (CeT)-vertebral, CeT-aortic and celiac-aortic-vertebral topographical relationships were recorded. Two needle insertion pathways were drawn on each of the images, at right and left, 9 cm and 4.5 cm away from the midline. Transfixed vital organs and gender-related associations were recorded. Results Aortic-vertebral - 45.37% at left and 54.62% in the middle; CeT-vertebral - T12, 36.11%; T12-L1, 32.4%; L1, 27.77%; T11-T12, 2.77%; CeT-aortic - 53.7% at left and 46.3% in the middle; celiac-aortic-vertebral - L-l, 22.22%; M-m, 23.15%; L-m, 31.48%; M-l, 23.15%. Neither correspondence on the right side nor significant gender-related associations were observed. Conclusion Considering the wide range of abdominal anatomical variations and the characteristics of needle insertion pathways, celiac plexus block should not be standardized. Imaging should be performed prior to the procedure in order to reduce the risks for injuries or for negative outcomes to patients. Gender-related anatomical variations involved in celiac plexus block should be more deeply investigated, since few studies have addressed the subject.


Behavioral Neuroscience | 2017

Intervention with the mother–infant relationship reduces cell proliferation in the Locus Coeruleus of female rat pups.

Elisa Cristiana Winkelmann Duarte; Márcia Scherem de Azevedo; Gabriela Augusta Mateus Pereira; Marilda da Cruz Fernandes; Aldo Bolten Lucion

The Locus Coeruleus (LC) is a noradrenergic nucleus involved in several neuroendocrine and behavioral functions. During the neonatal period, the LC is critical for olfactory learning. Full development occurs during the early postnatal period. Environmental interventions after birth may affect neurogenesis. In rats, the neonatal handling procedure has been used as a model to analyze the effects of environmental intervention early in life. It has been related to several long-lasting behavioral and neuroendocrine changes. The present study analyzed the effects of handling on the number of neurons, cellular proliferation, and apoptosis in the LC of 11-day-old female rats. Wistar rat pups were submitted to brief maternal separation followed by handling (1 min per day from postnatal day [PND] 1 to 10). On PND 11, the LC was analyzed using immunohistochemistry for NeuN and BrdU, TUNEL staining, and electron microscopy. The intervention reduced the number of neurons in the LC but showed no significant change in the number of apoptotic cells, as measured by the TUNEL technique. However, the number of proliferating cells was significantly lower in the handled rat pups as compared with the nonhandled ones. This study demonstrates that the infant LC is sensitive to changes in maternal behavior. A seemingly mild environmental intervention during the neonatal period may reprogram the development of the LC, altering cell proliferation.


Revista Brasileira de Educação Médica | 2017

O Ensino da Radiologia: uma Análise dos Currículos da Área da Saúde de Instituições de Ensino Superior na Região Sul do Brasil

Gabriela Augusta Mateus Pereira; Ana Maria Pujol Vieira dos Santos; Paulo Tadeu Campos Lopes


XII FÓRUM DE PESQUISA CIENTÍFICA E TECNOLÓGICA (Canoas) | 2012

Avaliação de três métodos de ensino em Anatomia Humana

Paulo Tadeu Campos Lopes; Ana Maria Pujol Vieira dos Santos; Gabriela Augusta Mateus Pereira; Caroline Nugem Teixeira


Archive | 2010

Fisiologia humana : testes

Gabriela Augusta Mateus Pereira; Adriane Pozzobon; Vera Cristina Brandão Diniz de Oliveira; Anapaula Sommer Vinagre; Cléber Fontoura Marcolan


Archive | 2006

Alterações ultraestruturais do Locus coeruleus em ratas manipuladas no período neonatal

Osni Gonçalves; Lídia Uliano Silveira; Maína Pereira Bonetti; Ana Helena Brittes; Gabriela Augusta Mateus Pereira; Elisa Cristiana Winkelmann Duarte; Marilda da Cruz Fernandes

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Paulo Tadeu Campos Lopes

Universidade Luterana do Brasil

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Aldo Bolten Lucion

Universidade Federal do Rio Grande do Sul

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A. M. P. V Santos

Universidade Luterana do Brasil

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Gilberto Luiz Sanvitto

Universidade Federal do Rio Grande do Sul

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Marilda da Cruz Fernandes

Universidade Federal de Ciências da Saúde de Porto Alegre

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Artur Francisco Schumacher Schuh

Universidade Federal do Rio Grande do Sul

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Anderlise Borsoi

Universidade Federal do Rio Grande do Sul

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Anelise Schindler Todeschin

Universidade Federal do Rio Grande do Sul

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