Figure 1
From: Signal quality of simultaneously recorded endovascular, subdural and epidural signals are comparable
Implanted devices, their placement, and example recordings. (a) EV array. (b) ED/SD array (Cortec gmbh, Freiburg, Germany). (c) X-ray image of the ED array (left), EV array (middle, implanted in the superior sagittal sinus), and SD array (right) implanted in a sheep brain. R, rostral. (d) MRI reconstruction of the sheep brain with the major veins shown. The box region shows the implantation site of the arrays, with the superior sagittal sinus marked in green. All scale bars are 5 mm. Averaged electrically evoked potentials were obtained by stimulating the median nerve at different current levels using cathodal monophasic constant current pulse, while simultaneously recording from the (e) SD, (f) EV, and (g) ED arrays. Red * indicates threshold level of stimulation.
