Multisensory integration of cross-modal stimulus combinations yielded responses that were significantly greater than those evoked by the best component stimulus. J Neurophysiol 97: 3193–3205, 2007. doi:10.1152/jn.00018.2007. Multisensory Versus Unisensory Integration: Contrasting Modes in the Superior Colliculus, Juan Carlos Alvarado, J. William Vaughan, Terrence R. Stanford, and Barry E. Stein...

submitted to the Department of Mechanical Engineering in partial fulfillment of the requirements for the degree of Master of Science in Mechanical Engineering at the Massachusetts Institute of Technology February 2001 @2001 Pablo Valdivia y Alvarado. All rights reserved. The author hereby grants to MIT permission to reproduce and to distribute publicly Paper and electronic copies of this thesis...

para -∞ < x < ∞, la cual se denomina función normal estándar. La cuarta derivada de la función normal estándar es continua en cualquier intervalo [a,b] en los números reales. Esto se debe básicamente a que la cuarta derivada L M. en C. Víctor Manuel Silva García, M. en C. Eduardo Vega Alvarado, Profesores del CIDETEC-IPN Ing. Salvador Pérez Cárdenas, Ing. Miguel Ángel Jiménez Cruz. Profesores d...

PURPOSE The aim of this study was to investigate the feasibility of using acoustic radiation force impulse (ARFI) imaging to diagnose acute appendicitis. METHODS Abdominal ultrasonography (US) and ARFI imaging were performed in 53 patients that presented with right lower quadrant pain, and the results were compared with those obtained in 52 healthy subjects. Qualitative evaluation of the pati...

OBJECTIVES To determine whether diagnosis by graded compression ultrasonography improves clinical outcomes for patients with suspected appendicitis. DESIGN A randomised controlled trial comparing clinical diagnosis (control) with a diagnostic protocol incorporating ultrasonography and the Alvarado score (intervention group). SETTING Single tertiary referral centre. PARTICIPANTS 302 patien...

OBJECTIVE The optimal diagnostics and treatment of acute appendicitis continues to be a challenge. A false positive diagnosis of appendicitis may lead to an unnecessary operation, which has been appropriately termed negative appendectomy. The aim of our study was to identify the effectiveness of preoperative investigations in preventing negative appendectomy. METHODS A retrospective study was...