Intraoperative neurophysiological monitoring for motor function preservation during AVMs resection: Indication or redundancy? Beyond the doctrine of "all-or-nothing".

The univariate analysis comparing ruptured and unruptured AVMs, showed that the two groups were similar for demographics, AVM side and size; moreover, the difference in terms of nidus topography with higher and lower motor risk was not statistically significant between the two groups and, as a consequence, pre- and post-operative mRS was significantly higher in the ruptured AVM due to the persistence of motor deficit after bleeding that in fact showed a trend (Table 2 ).

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