CONTENTS. ix 



Quality of the Stimulus — Summation of Stimuli — Intensity of the Stimulus— 

 Character of the Muscular Kesponse — Influence of the Locus of the Stimulus — 

 "Local Sign "and Spinal Reflexes — Fatality of Spinal Reflexes — Influence of 

 Condition of the Central Organ itself ; Vascular Condition — Drugs — Influence 

 of Associated Parts of the Central Organ; Inhibition and " Bahnung " — Co- 

 ordinate Character of the Movements — Phasic Variation in Reflex Activity — 

 Autotomy — Spinal "Shock" — Difference between Skeletal and Visceral 

 Musculature in regard to Shock — Spinal Visceral Reflexes — Urinary Bladder — 

 Defalcation — Sexual Spinal Reflexes — Other Visceral Reflexes — Reflexes Affect- 

 ing the Vascular Musculature — Significance of Spinal Reflexes — Spino- 

 Cerebral and Cerebro-Spinal Reactions — Conduction in the Cord— Spinal 

 Traumatic Hyperesthesia — Tonic Functions of the Cord — Automatism — 

 "Knee-Jerk" and Allied Phenomena — Trophic Functions of the Cord — 

 Regeneration of the Spinal Cord page 783 



THE PARTS OF THE BRAIN BELOW CEREBRAL CORTEX, 

 VIZ. MEDULLA OBLONGATA, PONS, CEREBELLUM, COR- 

 PORA QUADRIGEMINA, AND REGION OF THALAMUS. 



By C. S. SHERRINGTON. 



The Myelencephalon or Region of the Medulla Oblongata— The Root Cell 

 Systems — The Bulbo-spinal Frog — The Bulbo-spinal Mammal — -"Centres" 

 in the Bulb — Conduction Paths in the Bulb — The Metencephalon or Region 

 of the Pons Varolii and Cerebellum — Reactions in the Frog — And Rabbit 

 —The Pons — The Root Cell Systems — "Centres"— Conduction Paths - 

 The Cerebellum — Excitation — Lesions — Unilateral Ablation — Ablation 

 of the whole Cerebellum — Destruction of the Middle Lobe — Longitudinal 

 Bisection — Ablation in the Bird — Ablation in Lower Vertebrates — Phen- 

 omena caused by Section of the Cerebellar Peduncles — Section of Anterior 

 Peduncle — Section of Middle Peduncle — Section of Posterior Peduncle — 

 Bilateral Section of the Peduncles — Phenomena of Cerebellar Origin in Human 

 Disease — Inferences drawn from Comparative Anatomy — Functions of the 

 Cerebellum — The Mesencephalon or Region of the Corpora Quadrigemina 

 — The Root Cell Systems — Excitation of the Corpora Quadrigemina — Reac- 

 tions of Animals after Ablation of all the Encephalic Regions in front of the 

 Mesencephalon — Lesions of the Corpora Quadrigemina — Decerebrate Rigidity 

 — Conduction Paths through the Mesencephalon — The Diencephalon or 

 Region of the Optic Thalamus — Visual Connections — Excitation — Destruc- 

 tive Lesions page 884 



CUTANEOUS SENSATIONS. 



By C. S. SHERRINGTON. 



The Sense of Touch — Touch-Spots — The Adequate Stimulus — Weber's Law in 

 respect to Tactual Sensations— The Spatial Quality of Touch— Theory of 

 "Localising" Power of Touch — Projection of Touch — Illusions in Tactual 

 Judgments— Reaction Time for Touch— The Sense of Temperature— "Cold" 

 and "Warmth" as Distinct Species of Sense — Distribution of Apparatus for 

 Thermal Sensations in the Skin, etc.— The Adequate Stimulus— Other Stimuli 

 —Paradoxical Sensation of Cold— Some Characters of "Cold" and " Warmth ' : 

 Sensations— Relation of Thermal Sensation to Pain—Influence of A mil Extent 

 of Stimulus upon Intensity — The Physiological " Zero-temperature " and 

 " Adaptation "—The Degree of Projection of Thermal Sensation— The Thermal 

 Sense in relation to Thermotaxis — The Liminal Difference of Intensity of 

 Stimulus— Reaction Time— Antagonism of Sensations of "Cold"and "Warmth" 

 — Paths of Conduction— Common Sensation Cutaneous Pains considered in 

 relation to Pain in general— Relation of Pain to Intensity of Reaction— Quality 



