Simultaneous measurements of the thermally stimulated luminescence (TSL) and thermally stimulated currents (TSC) were carried out on synthetic electronic-grade quartz crystals excited by x rays. Samples were cut from +X-growth and +Z-growth sections of plates perpendicular to the Y axis of the quartz crystals. The electric field was applied along the Y axis and in some measurements along the optical axis (the Z axis). The TSL peaks at 70, 136, 161, 181, 188, 192, 221, and 250\char21{}270 K measured with the field along the Y axis all exhibited related TSC peaks. These TSL peaks involve the thermal release of electrons from traps into the conduction band, and so the related TSC must be electronic. The TSL peaks at 76, 83, 92, and 109 K did not show any corresponding TSC, which implies that in these cases no electrons are released into the conduction band. It is proposed that they involve the release of trapped holes and are not observable in the TSC because of the very low drift mobility of holes. Two strong TSC peaks at 216 and 300 K were observed with the field along the optical axis. The strong anisotropy of these peaks suggest that they are ionic in character; namely, they involve the migration of ${\mathrm{Li}}^{+}$ ions along the Z-axis channels. They seem to appear when electrons trapped near lithium ions are thermally released when the lithium ions become free to drift with the field along the Z channels.