Selected monographs on dermatology / P.G. Unna [and others].

Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Selected monographs on dermatology / P.G. Unna [and others]. Source: Wellcome Collection.

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    Diagram of Arterial Nerve Apparatus. Sensory Muscle Nerve (Constrictor) The tube in the diagram represents a piece of muscular cutaneous artery, just where it is about to enter the cutis vera. The lines represent nerves, the circles with dots in their centre, ganglia, and the points, nerve terminations. Two terminals are within the muscular wall of the artery, a motor at a and a sensory at sm. On the internal surface of the tube is a sensory endothelial nerve, se. The vascular ganglion g gives off two nerves to the motor terminal a, the fine filament g a taking origin from it, and a thicker so-called vaso-motor, m a, which only passes through it. This gan- glion also receives h g, a centripetal sensory nerve from the skin, and a centrifugal branch of communication, m g, from the higher centre m, or a so-called dilator. The vaso-motors and dilators generally run together in the case of the skin, e. g. the sciatic carries those for the leg. The centre m re- presents a series of vaso-motor ganglia distributed along the medulla and cord. In addition to the nerves already men- tioned, branches are received by this centre m from the cerebrum (p—m), from the heart (c—m), from the skin (h—m), and from the endothelial coat of the vessel (se—m), each of which conveys a psychical or sensory stimulus from the organ in question. If we wish to ascend from the favoured