distalward

The course of the superficial radial nerve is represented by a continuation of this line downward to the junction of the middle and lower thirds of the radial artery; it then crosses the radius and runs distalward to the dorsum of the base of the first metacarpal bone.

XII. Surface Anatomy and Surface Markings. 12. Surface Markings of the Upper Extremity 1918

The superficial volar arch (Fig. 1237) can be indicated by a line starting from the radial side of the pisiform bone and curving distalward and lateralward as far as the base of the thumb, with its convexity toward the fingers.

XII. Surface Anatomy and Surface Markings. 12. Surface Markings of the Upper Extremity 1918