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R_Chance |
![Ezren](http://cdn.paizo.com/image/avatar/05-Consumed_By_Beetle1.jpg)
Frodo pretty much said it. I think helpless pretty much precludes anything that takes Somatic or Material components. Verbal... varies.
Helpless (PFRPG Core Rulebook, pg. 567):
"Helpless: A helpless character is paralyzed, held, bound,sleeping, unconscious, or otherwise completely at an opponent’s mercy."
Depends on the spell requirements and which of those you are...
Paralyzed: Nothing that requires Verbal, Somatic or Material components (assuming your vocal chords are included).
Held: Nothing requiring Somatic or Material components, nothing Verbal if they've gagged you.
Bound: Nothing Somatic or Material, nothing Verbal if gagged.
Sleeping or Unconscious: Nothing allowed.
Otherwise: Who knows?
Metamagic (silent spell) would allow Verbal only spells if you memorized the spell with that in mind. And you weren't Sleeping or Unconscious :)
My take of course, others may agree / disagree.