An oligomeric compound comprising a modified oligonucleotide consisting of 10 to 30 linked nucleosides, wherein the modified oligonucleotide has a modification motif comprising: a 5'-region consisting of 2-8 linked 5'-region nucleosides, each independently selected from among a modified nucleoside and an unmodified deoxynucleoside, provided that at least one 5'-region nucleoside is a modified nucleoside and wherein the 3'-most 5'-region nucleoside is a modified nucleoside; a 3'-region consisting of 2-8 linked 3'-region nucleosides, each independently selected from among a modified nucleoside and an unmodified deoxynucleoside, provided that at least one 3'-region nucleoside is a modified nucleoside and wherein the 5'-most 3'-region nucleoside is a modified nucleoside; and a central region between the 5'-region and the 3'-region consisting of 6-12 linked central region nucleosides, each independently selected from among: a modified nucleoside and an unmodified deoxynucleoside, wherein the 5'-most central region nucleoside is an unmodified deoxynucleoside and the 3'-most central region nucleoside is an unmodified deoxynucleoside; wherein the modified oligonucleotide has a nucleobase sequence complementary to the nucleobase sequence of a target region of a target nucleic acid; wherein the nucleobase sequence of the target region of the target nucleic acid differs from the nucleobase sequence of at least one non-target nucleic acid by 1-3 differentiating nucleobases; wherein at least one central region nucleoside is a modified nucleoside; and wherein (a) said oligomeric compound comprises at least one modified 5'-region nucleoside comprising a bicyclic sugar moiety and at least one modified 5'-region nucleoside comprising a 2'-substituted sugar moiety, and/or (b) said oligomeric compound comprises at least one modified 3'-region nucleoside comprising a bicyclic sugar moiety and at least one modified 3'-region nucleoside comprising a 2'-substituted sugar moiety. a 5'-region consisting of 2-8 linked 5'-region nucleosides, each independently selected from among a modified nucleoside and an unmodified deoxynucleoside, provided that at least one 5'-region nucleoside is a modified nucleoside and wherein the 3'-most 5'-region nucleoside is a modified nucleoside; a 3'-region consisting of 2-8 linked 3'-region nucleosides, each independently selected from among a modified nucleoside and an unmodified deoxynucleoside, provided that at least one 3'-region nucleoside is a modified nucleoside and wherein the 5'-most 3'-region nucleoside is a modified nucleoside; and a central region between the 5'-region and the 3'-region consisting of 6-12 linked central region nucleosides, each independently selected from among: a modified nucleoside and an unmodified deoxynucleoside, wherein the 5'-most central region nucleoside is an unmodified deoxynucleoside and the 3'-most central region nucleoside is an unmodified deoxynucleoside; (a) said oligomeric compound comprises at least one modified 5'-region nucleoside comprising a bicyclic sugar moiety and at least one modified 5'-region nucleoside comprising a 2'-substituted sugar moiety, and/or (b) said oligomeric compound comprises at least one modified 3'-region nucleoside comprising a bicyclic sugar moiety and at least one modified 3'-region nucleoside comprising a 2'-substituted sugar moiety.