xxii TABLE OF CONTENTS 



PAGE 



4. The Mesencephalon, or Midbrain . . . .613 



A. The Corpora Quadrigemina . . . 613 



B. The Crura Cerebri 614 



5. The Diencephalon, or 'Tweenbrain 617 



6. Functions of the Brain-stem as a Whole 618 



CHAPTER XXIV. Physiology of the Cerebrum .629 



First Section: The Motor and Sensory Areas of the Cortex 632 



1. The Motor Areas 632 



A. General Survey 632 



B. Stimulation of the Motor Cortical Areas in Different Mammals . . 633 



C. Direct and Crossed Effects of Stimulation of the Motor Cortical Areas 640 



D. The Commissures between the' Cortical Areas of the Two Hemispheres 641 



E. Cortical Epilepsy 641 



F Suppression of the Motor Cortical Areas 643 



G. The Course of the Conducting Pathways from the Motor Cortical Areas 



to the Nuclei of the Motor Nerves 647 



H. Development of the Motor Areas of the Cortex 648 



2. Influence of the Cerebral Cortex on the Vegetative Processes of the Body 649 

 3. The Sensory Cortical Areas 650 



A. Area of General Sensation and Touch .651 



B. The Cortical Areas of Taste and Smell 653 



C. The Auditory Area . . 654 



D. The Visual Area 655 



E. Recapitulation 658 



Second Section: Psycho-physical Functions of the Cerebrum ..... 658 



1. The Significance of the Motor and Sensory Cortical Areas .... 659 



2. The Language Faculties 661 



3. The Association Centers of Flechsig 665 



A. Anatomical 666 



B. The Anterior Association Center 668 



C. The Posterior Association Center . . . . . . . .669 



D. Final Survey ... 670 



4. The Time Consumed by Psycho-physical Processes 673 



Appendix: Nourishment of the Brain 676 



CHAPTER XXV. Physiology of Special Nerves 680 



1. Cranial Nerves 680 



2. Spinal Nerves 682 



A. Sensory Nerves 682 



B. Motor Nerves 682 



3. The Sympathetic Nerves 685 



A. Relations of the Sympathetic Nerves to the Central Nervous System . 685 



B. Course of the Sympathetic Fibers 687 



C. Regeneration in the Sympathetic System 689 



D. Afferent Nerves in the Sympathetic System 689 



CHAPTER XXVI. Reproduction and Growth 691 



First Section: Reproduction 691 



1. The Male Sexual Organs 691 



A. TheTestes . 692 



B. The Accessory Sexual Glands . 692 



C. Erection and Ejaculation . . . 693 



