General Anatomy, Applied to Physiology and Medicine, Vol. 3 (of 3)Bichat, Xavier
Science
General Anatomy, Applied to Physiology and Medicine, Vol. 3 (of 3)
Bichat, Xavier
Human anatomy; Human physiology
What is the nature of this texture, which enters especially into the
composition of the cutaneous chorion? I know not; but I think it has
much analogy with the texture of the fibrous system; the following
considerations support this analogy. 1st. On the heel, where the
dermoid texture has the fibrous form of the irregular ligaments, it
would be almost impossible to distinguish it from it, so uniform is
the external appearance; it has the same resistance and density; the
same sensation is experienced when it is cut with the bistoury. 2d.
The dermoid texture becomes yellow and transparent like the fibrous
by stewing. 3d. It melts gradually like it into gelatine. 4th. Like
it, except the tendons however, it strongly resists maceration. 5th.
Sometimes these two textures are identified; for example, the annular
ligaments of the wrist evidently send elongations to the neighbouring
dermoid texture. 6th. This texture can serve, like the fibrous, for the
insertion of muscles; we see it in the face, where many of the fibres
of the orbicularis of the lips and the eyelids, and almost all those of
the eyebrows, find real tendons in the fibres of the dermoid texture.
There is the same arrangement in the cutaneous palmar muscles.
All these considerations evidently establish many relations between the
dermoid and fibrous textures. Yet they are far from being the same. To
be convinced of this it is sufficient to observe how much their mode
of sensibility differs, and how different also are their diseases; it
seems at first as if there was no analogy between them in this double
relation. Yet the line of demarcation is by no means as great as it
appears to be. In fact the acute sensibility of the skin is not seated
precisely in this white texture, which is interwoven so as to leave
between its meshes the spaces of which we have spoken, and which we
see especially on the surface adhering to this organ. The experiment
mentioned in the article on the mucous system, and in which I irritated
the cutaneous organ from within outwards, evidently proves it. It is
the surface on which the papillæ are found that especially exhibits
this vital property.
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