Let $\Sigma$ be a finite-type orientable surface with negative Euler characteristic, and $\mathrm{Mod}(\Sigma)$ denote the mapping class group. What are the finite normal subgroups in $\mathrm{Mod}(\Sigma)$?

For example, when $\Sigma$ is a genus 2 closed surface, then the hyperelliptic involution $\sigma$ lies in the center of $\mathrm{Mod}(\Sigma)$, so it generates a normal subgroup with 2 elements. Are there any other finite normal subgroups, or which one is the maximal one?

For higher genus, does there exist a non-trivial finite normal subgroup?