Table 2.

A comparison of apparent mean stiffness (‘K’, measured in N/m) for different size caudal direction perturbations, in normal and operate rats. Rats appear less stiff for larger perturbations (e.g. 300 vs 900). The two mean values in each row are compared with one another using a t-test constructed with the raw measurements , where n is the number of trials across across animals in the group. The significance of the differences calculated in this way is given on the right. 8 normal rats or 6 operate rats data were pooled to obtain these trials (6-8 trials per rat) . Statistical comparisons between the perturbations and groups using only the mean values obtained from each rat in each of the tested conditions were also all significant (p<0.05). Operate rats show lower apparent stiffness for all similar perturbations. This is consistent with predominant forelimb responses in operates.

Trials	P Value
Normal Rats Caudal 300, n=57 K 1.32	1.9E-11
Normal Rats Caudal 900, n=54 K 0.71
Operate Rats Caudal 300, n=51 K 0.97	1.52E-7
Operate Rats Caudal 900, n=45 K 0.39
Normals Caudal 300, n=57  K 1.32	0.002
Operates Caudal 300, n=51  K 0.97
Normals Caudal 600, n=60  K 0.895	0.0003
Operates Caudal 600, n=51  K 0.6
Normals Caudal 900, n=54  K 0.71 1.39E-6
Operates Caudal 900, n=45  K 0.394