A processing device in which maintenance can be easily carried out and a burden on a worker can be reduced, and a method of maintaining the device are provided. A sliding saddle is slidably mounted at the top of the inclined-hole drilling jig through two axial bars. Each contact defines a tail portion, which is out of the housing and receives through the channel. The decision circuit makes a decision on transmitted symbol from the output signal of the coherent signal combiner. Alternative embodiments of the invention provide a method of inhibiting motor neuron apoptosis and the subsequent muscular degeneration associated with the denervation of muscular tissue resulting from neuron death. Homogenization is accomplished with applied pressure, and pigment recovery, by washing and centrifugation.