Table 3. Experimental conditions on rat grimace scale.

Species	Strain	Sex	Age (weeks)	Verification method	Results	Reference No.
				(Type of pain elicited)	(Positive or Negative)
Rat	Wistar	Both	6–8	Intraplantar complete Freund’s adjuvant, intraarticular kaolin-carrageenan, and laparotomy	P	12
Rat	SD	Both	6	Dextran sulfate sodium colitis	P	37
Rat	SD	Both	- (B.W. 224–435 g)	Intraplantar carrageenan	P	38
Rat	SD	Male	- (B.W. 200–250 g)	Fibromyalgia	P	39
Rat	SD	Male	- (B.W. 275–349 g)	Neuropathic pain	P	40
Rat	Wistar	Male	8	Intraplantar carrageenan, intraplantar complete Freund’s adjuvant, plantar incision	P	41
Rat	SD	Male	- (B.W. 275–349 g)	Spinal cord injury	P	42
Rat	Wistar and SD	Female	6	Laparotomy	P	43
Rat	SD	Female	- (B.W. 284–420 g)	Implantation of a telemetric radio-transmitter device	P	44
Rat	SD	Female	- (B.W. 225–250 g)	Olfactory exposure to males, including men	P	60
Rat	SD	Male	10–13	Trigeminal neuropathic pain	P	62
Rat	Wistar	Male	96–100	Laparotomy	P	72
Rat	SD	Male	8	Hind-paw surgery	P	73
Rat	Wistar	Female	9–12	Laminectomy on spinal cord contusion	P	74
Rat	Wistar	Male	- (B.W. 340–492 g)	Sepsis	P	75
Rat	Wistar	Male	- (B.W. 275–325 g)	Liver biopsy by laparotomy and laparoscopy	P	76
Rat	SD	Male	- (B.W. 300–380 g)	Intracerebral hemorrhage	P	77
Rat	Wistar	Both	- (B.W. 250–300 g)	Hot-plate test and laparotomy	N	78
Rat	Wistar	Male	5–6	Endotoxin-induced exacerbated post-incisional pain	P	79
Rat	SD	-	- (B.W. 225–250 g)	Sciatic nerve resection	P	80