Archive image from page 528 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana05todd Year: 1859 A, Ganglion-corpuscles from the Gasserian gan- glion of a calf 7 inches long; B, nerve-fibres from the brachial plexus of the same animal; c, from the superior cervical ganglion of the sympathetic; D, nerve-fibres from the main cord of the sympathe- tic in the thorax. her of corpuscles similar to those in earlier embryos. There are also present a number of bodies larger than these, and consisting of a distinct cell-wall inclosing, besides a nucleus, a finely-g
Archive image from page 528 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana05todd Year: 1859 A, Ganglion-corpuscles from the Gasserian gan- glion of a calf 7 inches long; B, nerve-fibres from the brachial plexus of the same animal; c, from the superior cervical ganglion of the sympathetic; D, nerve-fibres from the main cord of the sympathe- tic in the thorax. her of corpuscles similar to those in earlier embryos. There are also present a number of bodies larger than these, and consisting of a distinct cell-wall inclosing, besides a nucleus, a finely-granular fluid. They are commonly round ; some are more or less egg-shaped. The nucleus in the latter is generally situated towards the wider extremity of the eel', while its narrow end is prolonged into a delicate, granular process about the -smooth °f an inch in breadth. The nerves in the gan- glia do not differ much in appearance from those in the Gasserian ganglion of the embryo of H inches in length. The sympathetic cord and branches present the same structure. In the ganglia of the cerebro-spinal nerves, the ganglionic corpuscles are larger and more dis- tinctly formed than in the sympathetic ganglia. Many of the cells have processes similar to those above described; and in several of these, at a short distance from the corpuscle, there is a small oval nucleus such as Kolliker describes in the human embryo of 16 inches. The nerves belonging to the cerebro-spinal system are also much further developed than those in the sympathetic. Those in the bra- chial plexus present the appearance of being composed of a slightly-granular transparent blastema, marked by longitudinal striae, and containing embedded in it oval granular nuclei. The striie are arranged parallel to one ano- ther, and evidently correspond to the margins of the nerve-fibres. The nuclei are arranged at intervals, and occupy the entire breadth of the fibres. There is no trace of the white substance of Schwann.
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