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What is All are actions of superior oblique except: and explain in detail?
Ans: a (Extorsion) Ref:Khorana, 4th ed, p. 315All are actions of superior oblique except extorsion which is the primary action of the inferior obliqueAction of extraocular musclesMusclePrimary actionSecondary actionTertiary actionMRAdduction LRAbduction SRElevationIntorsionAdductionIRDepressionExtorsionAdductionSOIntorsionDepressionAbduction10ExtorsionElevationAbduction Some useful mnemonics:All superiors are intorters. So inferiors are extortersAll recti are adductors. So obliques are abductorsRegarding nerve supply: Remaining all including levator palpabrae superioris by 3rd nerve.