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DEXTRAL TORSION:
A term denoting the situation in which the boundary between the fourth and fifth postcingular
homologues (IV/V) approaches a middorsal position and thus usually lies
proximal relative to the boundary between the third and fourth precingular homologues (4/5). It is as if the
hyposome has been rotated proximally with regard to the
episome. Such configurations are termed
dextrally contorted. The present use of the term dextral is analogous to its use in structural geology in describing relative movements along faults. See also
sinistral torsion and
neutral torsion. Refer to Text-Figure 83C.
DINOFLAJ (c) 1998