The promise of advanced neuroprosthetic systems to improve
the quality of life for the deaf, blind, paralyzed, or other handicapped
individuals hinges on the development of a safe and effective neural interface
for the central nervous system. Existing devices are typically made from
photolithographed or micromachined silicon which tend to be stiff, bulky; and
the recording quality substantially diminishes over relatively short periods of
time. Accordingly, there is a tremendous need for a reliable, flexible, and
long-term neural interface which can be implanted and maintained with relative
ease.
Researchers from Arizona State University have developed a
new multichannel implantable electrode device. Termed the Octopus electrode, the
device is fabricated on a flexible polymeric material with an array of dendrites
protruding from a single ribbon like tail. Each dendrite can accommodate 4-6
recording/stimulating sites and the device can accommodate 6-8 dendrites for a
total of 24 to 48 channels of recording capability. The tip of each dendrite is
bendable and can be stiffened either temporarily or permanently for precise
positioning. This technology is an important development that will help move the
neuroprosthetic systems industry forward. The device may also have non-cranial
implantable device applications.
Potential Applications
This technology can be used for a variety of applications
involving neuroscience and neuroprosthetics.
- Basic neuroscience research – neuron function analysis /
signal injection
- Brain/Machine interface research - Used to develop
neuroprosthetic solutions to treat difficult central nervous system problems.
- Long-term cerebral cortex monitoring and/or stimulation
Benefits and Advantages
- Versatility – Can accommodate both vertical and
horizontal motion of the brain tissue relative to the skull which is not
allowed with stiff structured electrodes.
- Adaptability – The position and depth of each leg can be
determined at time of insertion giving clinicians more control.
- Improved surgical handling and reliability– Superior
design allows multiple legs to share a single connection ribbon which provides
both a surgical anchor and a reliable connection to external
devices.M
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research, please see
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