Sentence:  Because of his <WSD>brain</WSD> injury and the extreme damage suffered to his sight , the patient had to train himself for a new line of work , that of a portfolio maker , an occupation requiring a great deal of precision in the making of measurements and a fairly well developed sense of form and contour . 
Meaning of the word marked with <WSD> tags:  that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord