* CONTENTS. 



II. GENERAL PHYSIOLOGY OP THE NERVE CENTRES 31 



Nerve centres, gray matter, commissural nerves, spinal cord, 

 32. Cerebral substance, 33. Cerebellum, 34. 



III. SPECIAL PHYSIOLOGY OF THE NERVOUS SYSTEM .... 35 



A. Peripheral nerves 35 



1. Cranial nerves: Olfactory and optic, 35; motores oculorum, 



patheticus, and motor oculi externus, 36; trifacial, 37; 

 facial and auditory, 38; glosso-pharyngeal and pneumo- 

 gastric, 39 ; hypoglossal and spinal accessory, 40. 



2. Spinal nerves 40 



Anterior and posterior roots, and recurrent sensibility, 41. 

 Ganglia at roots of spinal nerves, 42. 



B. Spinal cord 42 



Paths of conduction, 43. Neuroglia of the spinal cord, 44. 

 Course of the nerve fibres ; excitability and decussation 

 of fibres in the cord, 45. The cord as a nerve centre, 46. 

 Reflex movements, 47. Centres of deglutition, mastica- 

 tion, &c., 49. Classification of reflex actions, 51. Laws 

 of reflex action, 52. Variations in intensity of reflex ac- 

 tions, 54. 



C. Encephalon 55 



Sensations, general and localized, 56. Associated sensations, 

 memory and volition, 57. 



Special functions of certain cerebral centres, 59. 



Centre of faculty of language, corpora quadrigemina, 59. 

 Cerebellum, 60. Corpora striata, optic thalami, and sen- 

 sorium commune, 61. Corpus callosum, cerebral hemi- 

 spheres, 62. 



D. Great Sympathetic 63 



Rami communicantes, 63 ; ganglia, 64. Vaso-motors, 66. 



THIRD PART. 



CONTRACTILE ELEMENTS, MUSCLES AND THEIR 

 APPENDAGES. 



I. THE MUSCLES IN GENERAL 67 



Origin of the muscular tissue, cellular fibre, smooth fibre, 

 striated fibre, 67. Sarcous elements, 68. 



II. STRIATED MUSCLES 68 



Under form No. 1, 69 : elasticity, 70 ; chemical, 72; tonicity, 

 electro-motor force, 73.' 



Under form No. 2, 74 : elasticity, 74 ; chemical phenomena, 

 77 ; mechanical equivalent of heat, 78 ; electro-motor 

 force, negative variation, 80. 



Office of the muscle in the organism, 81 ; its irritability, 

 etc., 81. Analysis of the muscular contraction, 84. The- 

 ory of Rouget, 88. 



