Ghreline is a peptide hormone which is produced particularly by cells of the stomach mucous membrane and has an appetizing effect. Nevertheless, the last studies in the person as well as in the animal model showed that ghreline as well as receptos of ghreline become exprimated also in neurons. Antiapoptic effects of ghreline, an increase of the endogenous neuro genesis and support of the formation of dendritic synapses could be proved. In a study in the animal model (rats), for example, a neuroprotective effect from ghreline could be proved. Besides, ghreline showed neuro-regenerative effects after a stroke. As a possible mechanism an increased neuro genesis is accepted for this. Now the aim of our study is to be examined whether the patients with an ischemic stroke who have a high ghreline concentration have a better functional outcome. No interventions specific for study take place. It concerns with this research project not a clinical attempt, but a pure blood withdrawal plus survey. Besides, no special risks exist for the patient, because it is found in the routine treatment on the stroke station (Stroke Unit) of the canton hospital of Winterthur and no measures specific for study are carried out.