The effects of inanition and The effects of inanition and malnutrition upon growth and structure effectsofinaniti00jack Year: 1925 EFFECTS ON THE SPINAL CORD 197 Donaggio ('06, '07) likewise obtained modifications of the endocellular network of neurofibrillae in the nerve cells of rabbits under the combined influ- ence of cold and inanition, neither factor alone appearing effective. In the anterior horn cells, the fine fibrillar network presents coarser bands, possibly formed by fusion of the neurofibrillae. Riva ('05, '06, '07) also found that inani- tion alone usually produces relatively sl
The effects of inanition and The effects of inanition and malnutrition upon growth and structure effectsofinaniti00jack Year: 1925 EFFECTS ON THE SPINAL CORD 197 Donaggio ('06, '07) likewise obtained modifications of the endocellular network of neurofibrillae in the nerve cells of rabbits under the combined influ- ence of cold and inanition, neither factor alone appearing effective. In the anterior horn cells, the fine fibrillar network presents coarser bands, possibly formed by fusion of the neurofibrillae. Riva ('05, '06, '07) also found that inani- tion alone usually produces relatively slight changes in the neurofibrillae of the brain, spinal cord and spinal ganglia in fasting dogs and rabbits (Fig. 62). The endocellular network may be considerably modified, however, in cases where large vacuoles cause mechanical displacement of the neurofibrillae. The results of Donaggio and Riva were confirmed and extended by Gurewitsch ('08a) in the spinal cord of fasting rabbits and dogs, and by Mattioli ('io) in rabbits. The Fig. 62.—Nerve cells from the ventral horn of the spinal cord in the dog, showing the variable changes in the neurofibrillae by Donaggio's silver method after a loss of about 50 per cent in body weight from total inanition, a, a cell in which the neurofibrillae have retained nearly normal structure; b, cell showing some vacuolation in the perinuclear region; c, cell with disorganized neurofibrillae crowded into bundles between the numerous large cytoplasmic vacuoles. (Riva '06.) literature on these effects of inanition upon the nerve cells in general is fully reviewed by Marinesco ('09). In Necturus maculatiis starved 4 months the spinal cord was found nearly normal by Smallwood and Rogers ('n). After 16 months, however, the spinal cord appears greatly reduced in size, with atrophy especially of the gray sub- stance. Changes found in the spinal ganglia will be mentioned in the next chapter. In the nerve cells of the spinal cord in Triton cristatus
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