Related Experiment Video
Updated: Jul 23, 2026
09:56
Cochlear Implantation in the Guinea Pig
Published on: June 15, 2018
Implanted cochlear prosthesis analogue in primates
Summary
Researchers studied the biologic effects of electrical stimulation in the auditory system using a new implantable device in monkeys. Findings showed evidence of bone growth (osteogenesis) in the cochlea after implantation.
Area of Science:
- Biomedical Engineering
- Otolaryngology
- Neuroscience
Background:
- Profound deafness is treated with electronic cochlear prostheses.
- The biologic effects of electrical stimulation on the auditory system are not well understood.
Purpose of the Study:
- To investigate the biologic effects of intracochlear electrical stimulation.
- To test a newly designed, miniaturized, totally implantable constant-current device in vivo.
- To assess the feasibility of primate models for cochlear implant research.
Main Methods:
- A totally implantable constant-current electronic device was designed and miniaturized.
- The device was implanted in two Macaca nemestrina monkeys.
- Histopathologic analysis, including scanning electron microscopy, was performed on the implanted cochlea.
Main Results:
- The device's characteristics were documented.
- Primate implantation, behavioral observation, and histopathologic study were feasible.
- Evidence of osteogenesis (bone formation) in the scala tympani was observed in the implanted cochlea.
Conclusions:
- The study successfully demonstrated the feasibility of using a novel implantable device for studying electrical stimulation effects in the auditory system.
- Findings suggest potential biologic responses, such as osteogenesis, to intracochlear electrical stimulation.
