César G. Castellanos

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Se describe e ilustra una nueva especie del género Orphanodendron (Leguminosae, Papilionoideae), Orphanodendron grandiflorum. Esta nueva especie se descubrió en el municipio de Bolívar, departamento de Santander, en la cordillera oriental de Colombia y constituye la segunda especie conocida del género Orphanodendron. A new species of Orphanodendron(More)
Orphanodendron is a taxonomically and geographically isolated South American genus of two species. When first described by Barneby and Grimes in 1990, the genus was placed in Leguminosae subfamily Caesalpinioideae, but that placement was doubted and the name Orphanodendron (Gr. orphanos, orphan + dendron, tree) was chosen to reflect the uncertain(More)
Deep brain stimulation (DBS) is the most suitable surgical procedure for patients with Parkinson disease whose symptoms are not well controlled by drug treatment, or who cannot tolerate the side-effects of medication. The success of this surgery procedure, depends on the correct location of the neurostimulator device over the basal ganglia area (i.e.(More)
In this research article a dynamic estimation of neuronal activity and brain dynamics from electroencephalographic (EEG) signals is presented using a dual Kalman filter. The dynamic model for brain behavior is evaluated using physiological-based linear models. Filter performance is analyzed for simulated and clinical EEG data, over several noise conditions.(More)
e analysis of the architecture of Buxus vahlii Baill. (Buxaceae) in western Puerto Rico is presented. Two populations growing in diff erent environmental conditions were studied: one is a coastal forest in the municipality of Rincón and the other is a mountain forest with karstic formations in the municipality of Isabela. e growth pattern in Buxus vahlii(More)
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