CONTENTS OF PART III 



SECTION VI 



THE NERVOUS SYSTEM 



ORIGINALLY WRITTEN BT H. ST. JOHN BROOKS, M.D. 

 REVISED AND LARGELY REWRITTEN FOR THE FOURTH EDITION BY IRVING HARDESTY, A.B., PH.D. 



A. General Considerations 



Development of Nervous System . . 



B. Central Nervous System 



I. 



II. 



Spinal Cord . 



External Morphology 



Internal Structure 



Brain or Encephalon 



General Topography 



Rhombencephulon 



1. Medulla Oblongata 



2. Pons Varolii 



3. Cerebellum 



Cerebrum . 



III. 



Mesencephalon (Mid-brain) 

 . Proseneephalon (Fore- 

 brain) 



a. Diencephalon (Inter- 

 brain) 



6. Telencephalon (End- 

 brain) 



General Summary of Principal 

 Conduction Paths of Nervous 



System 



IV. Meninges 



C. The Peripheral Nervous System 



Cerebro-spinal Nerves 



I. Spinal Nerves 



Nerve-trunks 



a. Posterior Primary Di- 

 visions 



1. Cervical Nerves 



2. Thoracic Nerves 



3. Lumbar Nerves 



4. Sacral Nerves 



6. Anterior Primary Di- 

 visions 



1. Cervical Nerves 



Cervical Plexus 



Braeliial Plexus 



2. Thoracic Nerves 



3. Lumbar Nerves 



Lumbar Plexus 



Lumbo-saoral Plexus . . 

 Lumbo-sacral Trunk.. 



4. Sacral .Nerves 



Sacral Plexus 



Pudenda! Plexus 



Coccygeal Plexus 



PAGE 

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 814 



823 

 823 

 826 



869 

 882 

 899 

 901 

 901 

 902 



907 

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910 

 911 

 911 

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 935 

 BSfi 

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 957 



PAGE 



II. Cranial Nerves 957 



First Pair^-Olfactpry Nerves . 959 



Second Pair-^-Optic Nerves . . . 959 

 Third Pair Oculo-motor 



Nerves 961 



Fourth Pair Trochlear 



Nerves 962 



Fifth Pair Trigeminal Nerves 963 



Branches 964 



Ganglia 972 



Sixth Pair Abducens Nerves 974 



Seventh Pair Facial Nerves. 975 



Eighth PairAuditory Nerves 979 

 Ninth Pair Glosso-pharyn- 



geal Nerves 980 



Tenth Pair Pneumogastric 



Nerves 982 



Eleventh Pair Spinal Acces- 986 



sory Nerves 986 



Twelfth Pair Hypoglossal 



Nerves 987 



III. Distribution of the Cutaneous 



Branches of the Sensory and 



Mixed Cranial and Spinal 



Nerves 989 



Cutaneous Areas of Scalp .... 989 



Cutaneous Areas of Face 989 



Cutaneous Areas of Pinna ... 991 



Cutaneous Areas of Neck 991 



Cutaneous Areas of Trunk .. . 991 

 Cutaneous Nerve-supply of 



Limbs 993 



The Sympathetic System 998 



Sympathetic Trunks Id03 



Cephalic and Cervical Portions of the 



Sympathetic Trunk 1003 



1. Superior Cervical Ganglion .... 1005 



2. Middle Cervical Ganglion 1005 



3. Inferior Cervical Ganglion 1005 



Thoracic Portion of Sympathetic 



Trunk '. . . 1008 



Lumbar Portion of Sympathetic 



Trunk 1010 



Sacral Portion of Sympathetic Trunk 1010 



Great Prevertebral Pl< AII-I- 1011 



Cardiac Plexus 1013 



Coeliac Plexus 1013 



Hypogastric Plexus 1016 



