Does first dorsal interosseous muscle contraction result in radiographic reduction of healthy thumb carpometacarpal joint?
Contraction of the FDI appears to radiographically reduce subluxation of the healthy thumb CMC joint. Further exploration on the FDI's reducibility and its carry-over effects in arthritic thumbs is needed.
The association of this C4A null allele with SLE supports a role for C4A deficiency independent of other MHC associations in the etiopathogenesis of SLE.