Implant, cochlear
A device that is surgically placed (implanted) within the inner ear to help a person with a certain form of deafness to hear. Cochlear implants rarely cure severe or profound deafness, but they can help some hearing-impaired people to distinguish the sounds of language clearly enough to participate in a verbal environment. For children who are congenitally deaf (born deaf), a cochlear implant can markedly increase a preschool child’s chances of being able to function effectively in mainstream school classes.
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- Implantable cardiac defibrillator
A device that is designed to be put in the body to recognize certain types of abnormal heart rhythms (arrhythmias) and correct them by delivering precisely calibrated and timed electrical shocks to restore a normal heartbeat. Defibrillators continuously monitor the heart rhythm in order to detect overly rapid life-threatening arrhythmias, such as ventricular tachycardia (rapid […]
- Implantable pacemaker
The implantable pacemaker was invented by Wilson Greatbatch in 1958. While building an oscillator to record heart sounds, he installed a resistor with the wrong resistance in the unit. It began to give off a steady electrical pulse. Greatbatch realized that the device could be used to regulate the heart and hand-crafted the world’s first […]
- Implantation
The act of setting in firmly. In embryology, implantation refers specifically to the attachment of the fertilized egg to the uterine lining, which occurs approximately 6 or 7 days after conception (fertilization). Many medical devices or materials may be implanted (embedded). There are breast implants, cochlear implants, defibrillator implants, pacemaker implants, etc.
- Implantation, seed
Radiation treatment given by placing radioactive material contained within a small cylindrical shell directly in or near the target, often a tumor.
- Implicit memory
Memory characterized by a lack of conscious awareness in the act of recollection. By contrast, explicit memory requires conscious recollection of previous experience. Implicit memory may survive largely unimpaired at the same time as a person’s powers of explicit memory decline with age or are devastated in Alzheimer disease.