BDNF and Stroke: Lasek-Bal showed that patients with BDNF levels in the acute phase below the mean (9.96 ng/mL ± 5.21 ng/mL) functional status (according to the National Institutes of Health Stroke Scale (NIHSS) and mRS) 90 days after the ischemic event had a significantly worse outcome than the group of patients with higher BDNF levels [50].