NRN1 and subarachnoid hemorrhage: Wang et al reported that recombinant human Neuritin stimulated nerve regeneration and restored motor function in a rat model of sciatic nerve injury [31], while Liu et al reported that Neuritin reduced neuronal apoptosis induced by traumatic brain injury [32] and Zhang et al found that Neuritin protected against early brain injury in a subarachnoid hemorrhage model [33].