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Purpose: This study assesses the postural stability and the effect of balance training using a force platform visual biofeedback among outpatients with postural disturbances following stroke. Method: A tilting multiaxial force platform was used to assess bilateral postural stability in 38 outpatients (mean age 69.50 ± 8.57 years) with hemiplegia and/or ataxia after stroke. Stability indexes were obtained. Afterwards, a subgroup of 12 patients with the poorest overall stability index (OASI) started a balance training programme in the force platform.Postural control training consisted of a 30 minute training session once a week for a 15 week period. The test was then repeated. Results: In the 38 outpatients sample the mean OASI was 4.7 ± 2.0 and 42.1% of the patients used their hands for support. In the 12 outpatients group, the initial OASI was 5.8 ± 2.3 and half of the patients used their hands for support. The final OASI was 3.3 ± 1.0 (p=0.005) and only 2 of the patients used their hands for support (p=0.046). Conclusion: Our results suggest that a training program using force platform visual biofeedback improves objective measures of bilateral postural stability in patients with hemiplegia and/or ataxia after stroke.

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Inés Cortés CamposCentro Peninsular en Humanidades y Ciencias Sociales, UNAMResumen: Aunque en últimos años la industria turística ha sido una fuerza decisiva en la organización del sur y el oriente de la Península de Yucatán, antes de su irrupción se desarrollaron varias actividades centradas en la obtención de materias primas, las cuales tuvieron un gran impacto en la conformación moderna de dicho espacio social. Con miras a contribuir al estudio de la historia reciente del sureste de la península yucateca, este artículo presenta la historia social de dos poblaciones dedicadas a la producción industrial de sal marina y de maderas preciosas, actividades que durante buena parte del siglo xx constituyeron vectores importantes en la explotación del área mencionada. El propósito principal es problematizar los procesos modernos de construcción y transformación regional del oriente de la Península de Yucatán a la luz del surgimiento y devenires de las dos poblaciones.Palabras clave: región, pueblo-empresa, sal, empresa forestal, Yucatán. Abstract:Although the tourism industry has been a major force in organizing the South and East of the Yucatan Peninsula in recent years, before its irruption several activities focused in obtaining raw materials were developed. These activities had a great impact on the formation of this modern social space. In order to contribute to the study of the recent history of the Southeast of the Yucatan Peninsula, this paper presents the social history of two populations engaged in industrial production of sea salt and precious woods, activities which for most of the twentieth century constituted important vectors in the exploitation of the mentioned area. The main purpose is to discuss modern construction processes and regional transformation of the Eastern Yucatan Peninsula in light of the rise and changes of the two populations.