Fig. 7.

Intravascular neural recording.

(A) Experimental setup. (i) The intravascular nanowire electrode is inserted into the frog spinal anterior vessel through the microcatheter to record neural activities. Action potentials were elicited by bipolar electrode and conducted through the spinal cord. A surface electrode also recorded the activities for reference. (ii) Anterior side of spinal cord was exposed. A surface electrode is placed adjacent to the intravascular electrode. (B) Neural signals. Intravascular neural recording (i) and surface recording (ii) obtained comparable neural signals consisting of stimulus artifact and biphasic fast spikes.