Abstract
The implantable electrode assembly consisting of collagen and metalic electrodes has been developed to fill the need for the continuous recording of neural signals from the intact nerve and other bioelectrical signals (EKG and @EMG) in both anesthetized and awake animals. The electrical properties of collagen electrodes were compared with that of conventional metalic electrodes in physiological saline (0.9% NaCl) solution. When the electrodes were implanted on the nerves of cats, the collagen electrodes filled with extracellular fluid operated as a recording electrodes of neural signals. The mechanical noises in the collagen electrodes due to movement of the body or displacement of the electrodes were negligibly small as compared to those in the metalic electrodes. Using this implantable collagen electrode the neural signals were recorded in awake cats 0 to 8 days after imnlantation suroerv.
