Table 2.
Cortical area (mm2) occupied by forelimb movements in experimental (EXP; moderate repetition, negligible force) and control (CONT) rats, and mean thresholds (µA) to evoke movements. Mean±SD is shown.
| Movement | CONT | EXP |
|---|---|---|
| Total map area | 6.74±0.49 | 10.62±2.19b |
| Shoulder | 0.18±0.16 | 0.55±0.47 |
| Elbow | 3.31±1.52 | 4.31±1.39 |
| Wrist | 2.06±0.82 | 2.46±1.23 |
| Digits only | 0.11±0.26 | 0.15±0.12 |
| Elbow–Wrist | 0.60±0.60 | 1.79±0.75a |
| Arm c | 0.87±0.08 | 0.37±0.41 |
| Arm–Digits c | 0.06±0.02 | 0.99±0.81b |
| Multi-joint d | 0.95±1.13 | 3.15±1.53a |
| Overall map threshold | 30.2±10.2 | 28.0±6.0 |
| Shoulder threshold | 26.5±15.4 | 29.4±16.8 |
| Elbow threshold | 30.4±10.4 | 29.5±8.7 |
| Wrist threshold | 32.7±12.2 | 26.7±7.4 |
| Digit threshold | 37.5± 9.1 | 18.0±10.1a |
| Elbow-Wrist threshold | 30.7±12.4 | 26.1±9.4 |
| Arm threshold c | 28.7±17.0 | 29.8±15.9 |
a
Significantly different from controls, p<0.05.
b
Significantly different from controls, p<0.01.
c
Arm = shoulder-elbow-wrist multi-joint movement representation
d
Multi-joint = elbow-wrist + arm-digits