Flexible neural electrode structure and preparation method thereof

Abstract

The invention relates to the technical field of neuroscience, and discloses a flexible neural electrode structure and a preparation method thereof. The flexible neural electrode structure comprises a probe structure, wherein the probe structure comprises a main structure and a branch structure; an end of the branch structure is connected with the side surface of the main structure; a preset included angle a is formed in the position where the main structure and the branch structure are connected to each other; a is greater than 0 degree and is smaller than 180 degrees; and recording electrodes are arranged on the main structure and the branch structure, and are used for collecting brain neural signals, so that the detection range of the probe structure is expanded.

Description

technical field [0001] The invention relates to the technical field of neuroscience, in particular to a flexible nerve electrode structure and a preparation method thereof. Background technique [0002] Implantable flexible electrodes are one of the core hardware of brain-computer interface technology, and are widely used in neuroscience-related research; in the same detection area, neurons at different positions transmit a variety of neural signals, flexible neural electrodes manufactured by MEMS technology, The electrode sites of a single device are usually distributed longitudinally, resulting in the electrode can only detect neuron signals on the plane, which limits the ability of a single device to record different neural signals in space; in order to solve the above problems, it is necessary to form an array of several electrodes, And implanted at the same time, in order to achieve a wide range of neural signal acquisition. However, implanting multiple nerve electrode...

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Problems solved by technology

[0002] Implantable flexible electrodes are one of the core hardware of brain-computer interface technology, and are widely used in neuroscience-related research; in the same detection area, neurons at different positions transmit a variety of neural signals, flexible neural electrodes manufactured by MEMS technology, The electrode sites of a single device are usually distributed longitudinally, resulting in the electrode can only detect neuron signals on the plane, which limits the ability of a single device to record different neural signals in space; in order to solve the above problems, it is necessary to form an array of several electrodes, And implanted at the same time to achieve a wide range of neural signal acquisition

However, implanting multiple nerve electrodes at the same time is likely to cause brain tissue damage, and it is not convenient to lead out the signal pathway at the back end of the electrodes. Therefore, it is necessary to design a new nerve electrode structure to meet the needs of signal detection in a single device in a large space.

[0003] Generally, the common implantable flexible nerve electrode structure design is as follows: figure 1 As shown, in order to limit the size of the probe, the electrodes are mainly distributed along the longitudinal direction of the probe, and the lateral spacing is extremely small, which can only detect neuron signals in a limited space and cannot collect nerve signals from other locations in the same area, which limits the application of a single device

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