1. A method of treating a neurological condition in a subject comprising: administering to a subject in need thereof a composition comprising a cardiac glycoside in an effective amount to treat the neurological condition where cardiac glycoside oleandrin is included in the extract obtained by supercritical fluid extraction from the oleander plant mass, and the extract further comprises one or more other therapeutically effective agents obtained together with a cardiac glycoside if ekstraktsii.2. A method according to claim 1, comprising: determining whether or not a neurological condition in an individual with Alzheimers disease, Huntingtons disease, stroke or other neurological condition indication for the introduction of cardiac glycoside administering an initial dose of cardiac glycoside subject for the prescribed initial dosing schedule for. period of time, periodically determining the adequacy of a clinical response and / or therapeutic treatment of an individuals response to cardiac glycoside iesli clinical response and / or the individual therapeutic response is adequate, then continue to cardiac glycoside treatment as necessary to achieve the desired clinical endpoint iliesli clinical response and / or the individual therapeutic response is inadequate at an initial dose of the initial dosing schedule and then increase or decrease the dose to achieve the desired clinical response and / or therapeutic individuuma.3 response. A method according to Claim. 1, wherein the neurological condition is a neurological disease or disorder with an etiology svya1. Способ лечения неврологического состояния у индивидуума, включающий: введение нуждающемуся в этом индивидууму композиции, содержащей сердечный гликозид в эффективном количестве, для лечения указанного неврологического состояния, где сердечный гликозид является олеандрином, включенным в экстракт, получаемый сверхкритической флюидной экстракцией из растительной массы олеандра, и экстракт дополнительно содержит одно
