Literary Notices. cLx 



Influence of the Cerebral Hemispheres upon the Circulatory Apparatus. 



Tsherevhoff' conducted experiments on dogs to determine the 

 nature of this influence and states that: i. The maximum effect (in- 

 crease of blood-pressure and modification in the heart's action) was 

 obtained by stinndation of the gyrus sigmoideus and sulcus cruciatus 

 region were of three kinds, (a) increase of blood pressure without ac- 

 celeration of the heart's action, (b) inci ease of pressure and accelera- 

 tion of cardiac action, lasting, however, but a short time, (c) consid- 

 erably accelerated action and increase of pressure. All changes in 

 the action of the heart and vessels are obtained in animals through 

 the spasm induced by the current. He showed that the spasmogenic 

 portion of the cortex may be removed in case of epilepsy. 



Innervation of the Ciliary Body. 



Dr. Agababou, working under the direction of Professor Arnstein 

 of Kasan, has studied the nerves of the ciliary body of the eye in the 

 rabbit, cat and man. 



An albino cat is killed with chloroform and a three percent solu- 

 tion of methyl blue is injected into the carotid, after quarter or half an 

 hour the blued eye ball is excised and, removing the retina and teas- 

 ing away the tapetum from the tractus uvealis, the ciliary body may 

 be studied with a low power. 



The circular course of the nerve stems of the orbiculus gangliosus 

 is easily seen. These stems divide and form a nerve mat with scat- 

 tered ganglion cells chiefly of nonmedullated fibres and form the vaso- 

 motor tracts for the vessels of the ciliary body. The medullated 

 bundles form free "end-brushes" of a peculiar form. The terminal 

 fibres are varicose and relatively thick and end with a knob. 



The fibres lie at various depths. There is also a superficial 

 "nerve lattice" of anastomosing fibres. This lies upon the serous 

 surface of the ciliary body. It could not be determined whether this 

 reticulum is in continuity with that described by Meyer on the 

 front of the ins or not. On the bundles of the ciliary 

 muscles fine varicose fibres appear with the usual arrangement of 

 nerves of involuntary muscles. 



Thus four kinds of nerves are represented: i. vaso-motor 2. 

 motor end organs of the ciliary muscle, 3. a diffuse lattice on the 

 scleral surface of the ciliary body, 4. terminal tufts in the intermuscu- 

 lar connective tissue. 



'^Inaug. Dis. Harkoff. 1892, 



