Conservación preventiva de elementos decorativos y recubrimientos arquitectónicos en sitios arqueológicos en el sur de México

Decorative elements and architectural finishes can be divided in four groups according to their component materials, the time period, the culture in which they were created, and their function. These groups are based in their general characteristics such as: stucco finished (floors and plasters); stucco modeled elements; stone reliefs with or without plasters; and exempt elements, like sculptures, stelas, altars, etc. These elements can be found inside and outside structures and, in some cases, they have a structural function in the building. For its conservation both support material and meanings represented by them should be considered. Conservation activities can be divided into: emerging conservation, monitoring, preventive conservation and direct conservation. Through this activities, archaeological meanings are preserved

Synchronized activation of striatal direct and indirect pathways underlies the behavior in unilateral dopamine‐depleted mice

For more than three decades it has been known, that striatal neurons become hyperactive after the loss of dopamine input, but the involvement of dopamine (DA) D1‐ or D2‐receptor‐expressing neurons has only been demonstrated indirectly. By recording neuronal activity using fluorescent calcium indicators in D1 or D2 eGFP‐expressing mice, we showed that following dopamine depletion, both types of striatal output neurons are involved in the large increase in neuronal activity generating a characteristic cell assembly of particular neurons that dominate the pattern. When we expressed channelrhodopsin in all the output neurons, light activation in freely moving animals, caused turning like that following dopamine loss. However, if the light stimulation was patterned in pulses the animals circled in the other direction. To explore the neuronal participation during this stimulation we infected normal mice with channelrhodopsin and calcium indicator in striatal output neurons. In slices made from these animals, continuous light stimulation for 15 s induced many cells to be active together and a particular dominant group of neurons, whereas light in patterned pulses activated fewer cells in more variable groups. These results suggest that the simultaneous activity of a large dominant group of striatal output neurons is intimately associated with parkinsonian symptoms

Convergencias en el campo de la subjetividad

La problemática analizada en los artículos de la presente publicación ha sido estudiada considerablemente desde la filosofía y, en los dos últimos siglos, las ciencias sociales, incluyendo entre otras disciplinas la antropología, la sociología, la historia, la lingüística, las líneas culturalistas de las ciencias sociales, estudios de la religión y la mitología, y en forma destacada desde el psicoanálisis. La subjetividad y sus construcciones sociales en sus infinitas manifestaciones, como la eterna constructora del mundo humano, ha hecho especular tanto a sabios de todos los tiempos como al hombre cotidiano. Todos aquellos pensadores que han intentado explorar al ser humano en sus manifestaciones y construcciones subjetivas, en su inserción dentro de una cultura y en la clásica y equívoca oposición individuo-sociedad, han tenido que ver en algún momento con el estudio de la subjetividad

Cuando los muros hablan: observaciones y desafíos en Río Bec en torno a la decoración arquitectónica.

International audienc

Digitalización tridimensional para la documentación, análisis y conservación de bienes culturales: los relieves decorativos en piedra de la zona arqueológica de Tula, Hidalgo, México

In recent years, three-dimensional recording and analysis techniques have considerably developed, to the extent of becoming a key supporting tool for the preservation of cultural heritage. This research presents the Laboratorio de Documentación y Análisis Tridimensional (Lab3D, Three-dimensional Documentation and Analysis Laboratory) Coordinación Nacional del Conservación del Patrimonio Cultural (cncpc, National Coordination for the Conservation of Cultural Heritage) Instituto Nacional de Antropología e Historia (inah, National Institute for Anthropology and History), Mexico. It also explores the case study of the three-dimensional recording of a series of decorative stone reliefs from the archeological site of Tula, Hidalgo, Mexico, which will be of use in the monitoring and the decision-making processes for the conservation of this important cultural heritage.Las técnicas de registro y análisis tridimensional se han desarrollado de manera importante en los últimos años, al grado de constituirse en poderosas herramientas de apoyo para la preservación del patrimonio cultural. Esta investigación presenta el Laboratorio de Documentación y Análisis Tridimensional (Lab3D) de la Coordinación Nacional del Conservación del Patrimonio Cultural (CNCPC), Instituto Nacional de Antropología e Historia (INAH), mediante el estudio de caso del registro tridimensional del conjunto de relieves decorativos en piedra de la zona arqueológica de Tula, Hidalgo, México, el cual servirá para el monitoreo y la toma de decisiones en materia de conservación de este importante legado patrimonial