## 2 Results
### Changes in NMDA Receptors Subunits and NOS Activities Related to FL (Experiment I)
\begin{table}
\begin{tabular}{l l l l l} \hline \hline
**Groups** & \begin{tabular}{l} **Index of Laterality for** \\ **nNOS** \\ \end{tabular} & \
\begin{tabular}{l} **Index of Laterality for** \\ **eNOS** \\ \end{tabular} &
\begin{tabular}{l} **Index of Laterality for** \\ **iNOS** \\ \end{tabular} \\ \hline
**Experiment I** & & & & \\ \hline young adult controls (\(n=8\)) & \(-0.034\pm 0.033\) & \(+0.188\pm 0.077\) & \(+0.196\pm 0.235\) \\ young adult exposed to FL (\(n=10\)) & \(-0.072\pm 0.082\) & \(+0.020\pm 0.094\) & \(-0.128\pm 0.232\) \\ old controls (\(n=8\)) & \(+0.067\pm 0.065\) & \(+0.156\pm 0.064\) & \(-0.239\pm 0.226\) \\ old exposed to FL (\(n=9\)) & \(-0.007\pm 0.040\) & \(-0.029\pm 0.102\) & \(+0.084\pm 0.306\) \\ ANOVA: & \(p=0.448\) & \(p=0.266\) & \(p=0.637\) \\ \hline
**Experiment II** & & & & \\ \hline young adult controls (\(n=12\)) & \(-0.064\pm 0.033\) & \(+0.035\pm 0.088\) & \(-0.163\pm 0.270\) \\ young adult exposed to acute SD (\(n=12\)) & \(-0.113\pm 0.055\) & \(+0.093\pm 0.098\) & \(-0.282\pm 0.249\) \\ old controls (\(n=12\)) & \(-0.136\pm 0.058\) & \(-0.054\pm 0.061\) & \(-0.385\pm 0.137\) \\ old exposed to acute SD (\(n=12\)) & \(-0.077\pm 0.092\) & \(-0.007\pm 0.161\) & \(-0.396\pm 0.184\) \\ ANOVA: & \(p=0.846\) & \(p=0.800\) & \(p=0.860\) \\ \hline
**Experiment III** & & & \\ \hline young adult controls (\(n=12\)) & \(-0.113\pm 0.046\) & \(+0.005\pm 0.052\) & \(-0.180\pm 0.229\) \\ young adult exposed to chronic SD (\(n=12\)) & \(-0.128\pm 0.038\) & \(-0.011\pm 0.072\) & \(-0.263\pm 0.229\) \\ old controls (\(n=12\)) & \(+0.007\pm 0.034\) & \(+0.044\pm 0.074\) & \(-0.131\pm 0.179\) \\ old exposed to chronic SD (\(n=12\)) & \(-0.073\pm 0.046\) & \(+0.057\pm 0.071\) & \(-0.137\pm 0.231\) \\ ANOVA: & \(p=0.109\) & \(p=0.879\) & \(p=0.971\) \\ \hline \multicolumn{4}{l}{Results are presented as means \(\pm\) SEM. Indexes of laterality were calculated from data of Figures 2, 4 and 6. Experiment I experiments on young adult animals were performed in January, those on old animals in November. Experiment II: experiments on young adult animals were performed in April and May, those on old animals in December. Experiment III: experiments on young adult animals were performed in June, those on old animals in February.} \\ \end{tabular}
\end{table} 
Table 1: Indexes of laterality of activities of NOS isoforms in the R and L parietal cortex. Figure 3: Activities of nitric oxide (NO) synthases in the right and left parietal cortex of young adult and old rats exposed in response to forced locomotion. Activities of various NOS isoforms (**A**–**C**) are expressed as nmoles/30 min/mg of proteins. Results are presented as means \(\pm\) SEM. Statistical significance (Student’s \(t\)-test) was calculated with respect to young adult controls (* \(p<0.05\), **_p_\(<0.01\)). RH—right hemisphere, LH—left hemisphere, nNOS—neuronal NOS, eNOS—endothelial NOS, iNOS—inducible NOS, FL—forced locomotion, YCTRL—young adult controls (\(n=8\)), YFL—young adult rats exposed to FL (\(n=10\)), OCTRL—old controls (\(n=8\)), OFL—old rats exposed to FL (\(n=9\)).