Line graphs showing the effect of darbepoetin treatment on whisking amplitude (a) and velocity (b), following facial nerve crush injury, along with a table of associated P values, (a) Whisking amplitude during recovery was statistically higher in animals receiving darbepoetin (n = 20) compared to control animals (n = 16) on postoperative days 15, 18, and 21 when tested across days 13 to 21. (b) Whisking velocity during recovery was statistically higher in animals receiving darbepoetin compared to control animals on postoperative days 15, 18. and 21.