The Journal of nervous and mental disease . interstices. The individual sarcous elements vary slightlyin size and, especially in some of the muscle-fibres whichapparently are not in a state of intense contraction, areseen to be distinctly connected with the adjacent elementsby means of conical threads. These threads also tra-verse the interstices between the groups of the sarcouselements, and this connection is so well marked that in theentire field of a fibre not a single interruption between in- 148 GEORGE W. JACOB Y. dividual sarcous elements and groups of elements isvisible. Muscle-fibres
The Journal of nervous and mental disease . interstices. The individual sarcous elements vary slightlyin size and, especially in some of the muscle-fibres whichapparently are not in a state of intense contraction, areseen to be distinctly connected with the adjacent elementsby means of conical threads. These threads also tra-verse the interstices between the groups of the sarcouselements, and this connection is so well marked that in theentire field of a fibre not a single interruption between in- 148 GEORGE W. JACOB Y. dividual sarcous elements and groups of elements isvisible. Muscle-fibres which are evidently in a state of intensecontraction show the sarcous elements lying close againsteach other, so that even when the short threads cannot bemade out, a direct continuity is seen to be present by theimmediate contact of the sarcous elements between them-selves. Whenever a nucleus is seen at the periphery of afibre, its contour is likewise seen connected with the adja-cent sarcous elements bv means of these delicate Fig. 6.—Segment of a muscle tibre from myotonia congenita. Quadriceps section. X 1200. Furthermore, wherever there are motor plates at the pe-riphery of a fibre, a continuity is also established betweenthem and the neighboring sarcous elements (Fig. 3).Chloride of gold solution stains the sarcous elements andtheir connecting threads a violet color, thus renderingthem more distinctly visible. THOMSEN S DISEA SE. 149 Transverse sections from the muscle affected with my-otonia congenita, when regarded with the same power(1,200), show almost everywhere a lack of continuity be-tween the groups of sarcous elements. This feature ismost conspicuous along the splits and gaps spoken ofabove; secondary smaller splits, which traverse thelarger groups of sarcous elements, show here and thereonly a few connecting threads. The sarcous elements within the smallest fields areclosely packed together, so that a mutual contiguity is es-tabl
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpsychologypathologic
