NT‐3 attracted recovering adult rat corticospinal fibers and induced regeneration.[32] NT‐4 and NT‐5 have also been shown to have positive effects on recovering nerves, preventing cell death, promoting functional reinnervation, and increasing axonal diameter, number, and myelin thickness[68] Following a stroke, pericytes were shown to have increased NT‐3 expression.[136]. This evidence concerns the gene NTF4 and stroke disorder.