Browsing by Author "Reyes Ponce, Alvaro"
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- ItemAsociación entre el estado nutricional y la prevalencia de pie plano en niños chilenos de 6 a 10 años de edad(2016) López Fuenzalida, Antonio Eduardo; Rodríguez Canales, Carolina; Reyes Ponce, Alvaro; Contreras Molina, Ángela; Fernández Quezada, Javiera; Aguirre Polanco, Carolina
- ItemEvaluation of the crossed cerebro-cerebellar activation to determine language lateralization in patients with brain tumors(SOC MEDICA SANTIAGO, 2021) Mendez Orellana, Carolina; Arrano Carrasco, Leonardo; Cortes Rivera, Barbara; Sandoval Leon, Karina; Lorenzoni Santos, Jose; Villanueva Garin, Pablo; Rojas Valdivia, Ricardo; Mendez Ortega, Teobaldo; Monsalve Rosales, Jaime; Flores Kruuse, Paulo; Carmona Rammsy, Pablo; Rojas Pinto, David; Reyes Ponce, Alvaro; Mery Munoz, FranciscoBackground: The crossed cerebro-cerebellar (CCC) activation facilitates the diagnosis of cortical language lateralization, but needs to be explored with language tasks suitable for patients with different age ranges, educational attainment and eventual presence of language deficits. Aim: To determine the effect of demographic variables in the performance of three language tasks in healthy volunteers and to determine the CCC activation of these tasks as a functional magnetic resonance imaging (fMRI) paradigm in brain tumor patients. Material and Methods: The behavioral performance (correct responses and reaction time) of three language tasks (verbal fluency, semantic and phonological decision tasks) was first examined in 76 healthy volunteers balanced by age and educational level. Later, these tasks were implemented as fMRI paradigms to explore CCC language activation of 20 patients with potential diagnosis of brain tumors. Results: The performance of the verbal fluency task was affected by age. The CCC language activation was reproducible with the semantic and phonological tasks. The combination of the tasks determined typical and atypical language lateralization in 60% and 40% of our patients, respectively. Conclusions: The verbal fluency task must be implemented with care as a clinical fMRI paradigm. Our results suggest that semantic and phonological tasks can be a good alternative for brain tumor patients with language deficits.
- ItemKnee sensorimotor control following anterior cruciate ligament reconstruction: a comparison between reconstruction techniques(2018) San Martín Mohr, Cristóbal; Cristi-Sanchez, Iver; Pincheira, Patricio A.; Reyes Ponce, Alvaro; Jose Berral, Francisco
- ItemMetabolic demand and muscle damage induced by eccentric cycling of knee extensor and flexor muscles(2017) Reyes Ponce, Alvaro; Penailillo, L.; Guzman, N.; Cangas, J.; Zbinden, H.
- ItemMuscle Activity and Aerodynamic Voice Changes at Different Body Postures: A Pilot Study(Elsevier Inc., 2022) Castillo Allendes, Adrián; Delgado Bravo, Mauricio Antonio; Reyes Ponce, Alvaro; Hunter, Eric J.© 2022 The Voice FoundationObjective: Body posture is a commonly discussed component of voice training and therapy. However, body postures, postural changes, related posturing muscle monitoring, and the potential changes in voice production (eg, glottal aerodynamic changes, acoustic differences) have been inconsistently described in the literature, leaving room for free interpretation and possible misunderstandings. The primary purpose of this pilot study was to compare the magnitude of electromyographical activation of muscles involved in phonation-breathing functions and their changes due to four standardized body postures in experienced singers. Secondly, to identify which body posture produces greater changes in aerodynamic parameters, vocal pitch, and loudness. Methods: Eight healthy adults with experience in singing voice performed a vocal task during different body postures commonly used in both voice training and therapy. A 3D-capture system was used to control and quantify the alignment of each posture. During the performances, surface electromyography (sEMG) was used to measure the muscular activity involved in the breathing/phonation and posture processes. A nonparametric Kruskal-Wallis test was used to compare the sEMG activity of phonatory muscles and aerodynamic voice variables between postures. Results: Our study did not reveal significant differences in sEMG activity, aerodynamic parameters, vocal pitch, and loudness among body postures during vocal task productions. However, the vocal pitch (in semitones) revealed significant differences in the unstable surface when compared to the upright posture, modified upright, and leaning postures. Conclusion: The body postures selected did not generate voice aerodynamic modifications of the voice nor in the levels of activation of muscles involved in the phonation-breathing process in individuals with experience in singing voice. Modifications of body posture as a tool for voice therapy should be further investigated, considering the population with voice problems and no voice training experience.
- ItemStudy of inhaler technique in asthma patients : differences between pediatric and adult patients(2015) Manriquez, Pablo; Acuña, Ana María; Muñoz, Luis; Reyes Ponce, Alvaro
- ItemThe effects of respiratory muscle training on peak cough flow in patients with Parkinson’s disease: a randomized controlled study(2018) Reyes Ponce, Alvaro; Castillo Allendes, Adrián Salvador; Castillo, Javiera; Cornejo, Isabel
- ItemValidity and reliability of evaluating hip abductor strength using different normalization methods in a functional electromechanical device(2018) Cerda Vega, Enrique; Jerez-Mayorga, Daniel; Machado Payer, Ramon; Campos Jara, Christian Alex; Guzman-Guzman, Iris; Reyes Ponce, Alvaro; Javier Chirosa, Luis
- ItemVariaciones en el estado nutricional y su refl ejo en la composición corporal en mujeres chilenas con síndrome metabólico(2016) López Fuenzalida, Antonio Eduardo; Valdés Badilla, Pablo; Herrera Valenzuela, Tomás; Rodríguez Canales, Carolina; Reyes Ponce, Alvaro; Arriaza Ardiles, Enrique; Durán Agüero, Samuel