Naming difficulties may be rank ordered along a continuum. Items are rank ordered in terms of their ability to be named, which is correlated with their frequency. This type of picture-naming test is also useful in the examination of children with learning disabilities and the evaluation of brain-injured adults.
The Jarvik-7 heart was developed by American scientist Robert Jarvik and his mentor, Willem Kolff. In 1982, Seattle dentist Dr. Barney Clark was the first person implanted with the Jarvik-7, the first artificial heart intended to last a lifetime.
Inventor with heart: Wilson Greatbatch, posing in his Newstead workshop in 1997, invented the first implantable pacemaker in 1958. Wilson Greatbatch, who saved countless lives with his invention of the implantable cardiac pacemaker, has died at the age of 92.A family spokesman confirmed that Mr Greatbatch died yesterday at the Oxford Village assisted living centre in Canterbury Woods, a suburb of Buffalo, New York state.ilson Greatbatch, who saved countless lives with his invention of the implantable cardiac pacemaker, has died at the age of 92. A family spokesman confirmed that Mr Greatbatch died yesterday at the Oxford Village assisted living centre in Canterbury Woods, a suburb of Buffalo, New York state.