148 INNEEVATION. [CHAP. XXI. 



viscera of the body, the heart and the intestinal canal especially ; 

 it is also a sensitive nerve to these parts ; and it presides over the 

 actions of the blood-vessels of these as well as of other parts where 

 it is distributed, as of the head and neck, and likewise of all the 

 principal glands of the body. 



On the Sympathetic Nerve, consult Cruveilhier, Anat. Descr. ; Valentin 

 in Soemmerring, Anat. ; Longet, Syst. Nerveux ; Lobstein, de Nervi Sympath. 

 fabrica, etc. ; Valentin de Function. Nerv. Cerebr. et Sympath. ; Mr. Beck, 

 paper in the Phil. Trans, for 1846 ; Miiller's Physiology ; Bidder und Volk- 

 mann, die Selbstandigkeit des syrnpathischen Nervensystems, Leipzig, 1842 ; 

 Kolliker, die Selbstandigkeit und Abhangigkeit des sympathischen Nerven- 

 systems, Zurich, 1844 ; Purkinje, in Miiller's Archiv. for 1845, and translated 

 in the Lond. Med. Gazette, vol. xxxvi., has described nervous ramifications 

 which he considers to belong to the sympathetic, in the pia mater, dura 

 mater, serous membranes, and other parts. Mr. Kainey also describes (Med. 

 Chir. Trans, vol. xxix.) the arachnoid and subarachnoid tissue as consisting 

 almost entirely of such nerves, a view which it is impossible for us to adopt. 

 Much yet remains to be cleared up as regards the anatomical history of the 

 sympathetic nerve in particular parts. Monographs upon the nerves of the 

 heart, of the stomach, the intestines, etc., are great desiderata, founded on 

 careful and minute dissections, by experienced anatomists, with the aid of the 

 microscope. Further researches are likewise required on its distribution in 

 the extremities. 



