Line graphs illustrating time course data for mechanical threshold assessed with either von Frey hairs (A), or an automated machine-mounted probe (MMP, B), a noxious mechanical blunt pin (prick) stimulus (C), or a cold (topical acetone) stimulus (D). When delivered 2 wk after SNI, bilateral microinjection of lidocaine (4%), but not saline, reduced all signs of neuropathic pain at the paw ipsilateral to SNI. Data is expressed as mean ± SEM. n=3-6. ★p < 0.01.