The action of nicotin on the ciliary ganglion and on the endings of the third cranial nerve / by J. N. Langley and H. K. Anderson.

  • Langley, J. N. (John Newport), 1852-1925.
Date:
[1892]
Catalogue details

Licence: Public Domain Mark

Credit: The action of nicotin on the ciliary ganglion and on the endings of the third cranial nerve / by J. N. Langley and H. K. Anderson. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    nerve-cells of the ciliary ganglia, so that impulses passing to them down the 3rd nerve are blocked. A large dose of nicotin (100 mgrs.) does not paralyse the endings of the short ciliary nerves in the iris and the ciliary muscle. In the rabbit, the order of ease of paralysis with nicotin of the nerve- cells and nerve-endings which we have investigated is: 1. Nerve-cells of the ciliary ganglion on the course of the nerve- fibres to the sphincter iridis and (probably) ciliary muscle. 2. Nerve-cells of the superior cervical ganglion on the course of the nerve-fibres which cause dilation of the pupil. 3. Nerve-endings of the 3rd, 4th and 6th nerves in the extrinsic muscles of the eye. The nerve-endings of the 3rd nerve in the elevator of the eyelid and the nerve-endings in the muscle causing protrusion of the nictitating membrane are paralysed a little less readily than those in the extrinsic muscles of the eye. 4. Nerve-endings in muscles supplied by the 5th and 7th nerves. About the same time as these, all the nerve-endings in the skeletal muscles of the body are paralysed.