A course of elementary practical physiology / by M. Foster ; assisted by J.N. Langley.

  • Foster, M. (Michael), Sir, 1836-1907.
Date:
1884
Catalogue details

Licence: Public Domain Mark

Credit: A course of elementary practical physiology / by M. Foster ; assisted by J.N. Langley. Source: Wellcome Collection.

    40/412 (page 28)
    fusiform enlargement, the ganglion of the trunk. 12. Note the hypoglossal^ a large nerve running across the pneumogastric a little centrally of its ganglion. Trace it forwards to the muscles of the tongue. 13. Follow lip the sympathetic nerve, it has, at about the level of the ganglion of the pneumogastric, a considerable enlargement, the superior cervi- cal ganglion^ observe the fibres which run from this along the carotid artery and its branches. 14. In the dog the sympathetic and pneumogastric nerves which run in a common sheath in the neck (cf. C, § 28 (y)) separate from one another a little distance from their respective ganglia. Partly saw through the symphysis menti, then use a lever and force the rami asunder, and in the following dissection cut through or remove any muscles necessary. Trace the lingual backwards. It will be found to join the inferior dental (a large nerve entering into the lower jaw), to constitute, with other branches, the inferior maxillary nerve. Trace this back to the front edge of the tympa- nic bulla. 17. Note in the dog the small nerve, chorda tym- pani, which joins the lingual soon after the latter branches off from the inferior dental; trace the chorda tympani centrally, it will be found to make its exit from the tympanic bulla 15. 16.