A simple apparatus for the mechanical stimulation of nerve / by E.A. Schäfer.
- Edward Albert Sharpey-Schäfer
- Date:
- [1901]
Licence: In copyright
Credit: A simple apparatus for the mechanical stimulation of nerve / by E.A. Schäfer. Source: Wellcome Collection.
Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.
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![[From the Proceedings of the Physiological Society, Jan. 26, 19U1.] A simple apparatus for the mechanical stimulation of nerve. By E. A. Schafek. An apparatus which I have found of great value for the mechanical stimulation of nerve is one which allows mercury to fall drop by drop upon the part of the nerve which it is desired to stimulate. The latter may if desired be protected from actual contact with the metal by placing over it a thin film of gutta-percha tissue. In order to avoid any splash of the mercury and also to furnish a grooved position from which the nerve is not readily displaced, it is passed into a short glass tube with a hole blown into it through which the mercury is allowed to drop either di- rectly on to the nerve or against its side. The glass tube containing the nerve is inclined in such a way that the drops of mercury are conducted away from the preparation and are received into a bottle below. The jar of the drop is an efficient mechanical stimulus for the nerve. The mercury is contained in a reservoir which may take the form of a short thistle funnel; this is connected by an indiarubber tube to a short piece of glass tubing drawn out to a point the size of which is so adjusted as to deliver drops of mercury weighing each about 01 gramme. The rate of dropping is adjusted by means of a clamp, which is rigidly attached to a brass frame in which the tube of the thistle funnel and the delivery tube are also held, and the clamp, actuated by a finely](https://iiif.wellcomecollection.org/image/b21455788_0004.jp2/full/800%2C/0/default.jpg)
