Provided herein are novel bicyclic nucleosides, oligomeric compounds that include such bicyclic nucleosides and methods of using the oligomeric compounds. More particularly, the novel bicyclic nucleosides comprise a furanose ring system having a bridge comprising a 4′-methylene group attached to a 2′-sulfoxide or sulfone group and optionally including one or more substituent groups attached to the 4′-methylene and or the 5′-position. In certain embodiments, the oligomeric compounds provided herein are expected to hybridize to a portion of a target RNA resulting in loss of normal function of the target RNA.
