Spasmophilia - the special form of frustration of an exchange of a calcium and phosphorus at children of early age sick of a rachitis, described the raised nervously-reflex excitability with predilection to tonic cramps owing to a hypocalcemia.

Etiology and pathogenesis. The maintenance of a calcium in Serum of a blood at a rachitis decreases in an initial phase, at an exacerbation and as a result therapies. In connection with falling of a level of the ionized and general calcium excitability of nervous system, down to a convulsive syndrome considerably raises. Decrease of ionization of a calcium is promoted by a hyperphosphatemia. At an insufficient or superfluous medical dose of vitamin D or at the raised insolation in spring months in a bone acts more calcium, than it is soaked up in an intestine due to mobilization of a calcium from a blood. The absorption of a calcium is broken at digestive disturbances and intestinal infections.