| epaxial | <anatomy> Above, or on the dorsal side of, the axis of the skeleton; episkeletal. Origin: Pref. Ep- + axial. Source: Websters Dictionary (01 Mar 1998) |
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| epaxial |
the region dorsal to the lateral septum in fishes. Although tetrapods lack a lateral septum, this region remains developmentally distinct and gives rise to a special set of muscles, the epaxial musculature, which includes elements ultimately traceable to the dorsal fin musculature of fishes. The lateral septum in fishes extends laterally from the spinal cord. The spine tends to be somewhat centrally located, and the epaxial region is thus quite large. ...
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