Focal muscular atrophy (FMA) has various causes and, hence, various signs and symptoms. 1  Muscle wasting is probably the presenting symptom when the onset is insidious (see images below). Weakness may not be a primary symptom in these patients. 2  Muscle weakness occurs when the onset is more abrupt.
Mexico) The Central America Volcanic Arc is a chain of volcanoes which extends parallel to the Pacific coast line of the Central American Isthmus, from Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, and down to northern Panama.ince Central America is a major subduction zone, Nicaragua hosts most of the Central American Volcanic Arc. Seismograms are available on the Ineter webseite; for volcanoes check Volcano monitoring stations and Broadband stations. - For lots of interesting info and photos go to Xolo ! Nicaragua: MASAYA O-Web 5 min.
Map of the volcanic arcs in the Andes, and subducted structures affecting volcanism. The Andean Volcanic Belt is a major volcanic belt along the Andean cordillera in Colombia, Bolivia, Peru, Ecuador, Chile and Argentina.It formed as a result of subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate.The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products and morphology.t is one of the four volcanic zones of the Andes. The Central Volcanic Zone extends from Peru to Chile and forms the western boundary of the Altiplano plateau. The volcanic arc has formed due to subduction of the Nazca Plate under western South America along the PeruâChile Trench.