CONTENTS 



PART I. GENERAL DESCRIPTION AND 

 INTERPRETATION 



I. Salamanders and Their Brains JJ 



The salamanders, 3. — The scope of this inquiry, 4. — The plan of 

 this book, 6.— Sources and material, 10.— Development of the brain, 

 11. — The evolution of brains, 13 



II. The Form and Subdivisions of the Brain 18 



Gross structure, 18.— Ventricles, "24.— Meninges, chorioid plexuses, 

 and blood vessels, 'id 



III. Histological Structure '28 



General histology, 38.— The neuropil, '29.— The ventrolateral 

 peduncular neuropil, 3,3 



IV. Regional Analysis 4<> 



The subdivisions, spinal cord to pallium, 41.— The commissures, ;5;5. 

 ^Conclusion, 56 



V. Functional Analysis, Central and Peripheral 57 



The longitudinal zones, 57. — The sensory zone, 58. — The motor 

 zone, 60. — The intermediate zone, 64.— The functional systems, 65 



VI. Physiological Interpretations '^^ 



Apparatus of analysis and synthesis, 70. — The stimulus-response 

 formula, 7^2. — Reflex and inhibition, 73.— Principles of localization 

 of function, 8'2 



Vll. The Origin and Significance of Cerebral Cortex .... 91 

 The problem, 91. — Morphogenesis of the cerebral hemispheres, 

 9*2. — The cortex, 98. — Physiology and psychology, 106 



VIII. General Principles of Morphogenesis 109 



Morphogenic agencies, 109. — Morphological landmarks, 116. — The 

 future of morphology, 120 



PART II. SUR\^Y OF INTERNAL STRUCTURE 



IX, Spinal Cord and Bulbo-spinal Junction 1'25 



The spinal cord and its nerves, 125. — The bulbo-spinal junction, 

 129 



X. Cranial Nerves l-^l 



Development, 131. — Survey of the functional systems, 132 



XI. Medulla Oblongata ^^'^ 



Sensory zone, 153. — Intermediate zone, 156. — Motor zone, 157. — 

 Fiber tracts of the medulla oblongata, 158.— The lemniscus 

 sy.stems, 162 



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