Artificial organ a stationary power supply or other stationary resources such as filters or chemical processing units. (Periodic rapid recharging of batteries, refilling of chemicals, and/or cleaning/replacing of filters would exclude a device from being called an artificial organ.) Thus, a dialysis machine, while a very successful and critically important life support device that almost completely replaces the duties of a kidney, is not an artificial organ. Constructing and installing artificial organs, an extremely research-intensive and expensive process initially, may entail many years of ongoing maintenance services not needed by a natural organ.: The use of any artificial organ by humans is
Transneuronal degeneration transneuronal degeneration can also occur at a late stage after brain injury because after the period of latency, neuroplastic rearrangement follows deafferentation. This deafferentation creates interruption of complex circuitry, which can lead to transneuronal structural degeneration. Although studies have shown that lesions can lead to transneuronal degeneration, lesions in the somatic motor system might not cause it. There is not much information on how transneuronal degeneration affects the somatic motor system . Anterograde transneuronal degeneration is not likely to happen since motor neurons are often exhibit convergence (receive input from wide variety of afferent systems). Transneuronal degeneration of lower motor