CUTANEOUS SENSATIONS. 

 By C. S. Shekkington. 



Contents : — The Sense op Touch, p. 921— Touch-Spots, p. 921— The Adequate 

 Stimulus, p. 924 — Weber's Law in respect to Tactual Sensations, p. 928 — The 

 Spatial Quality of Touch, p. 934— Theory of " Localising " Power of Touch, 

 p. 938 — Projection of Touch, p. 941 — Illusions in Tactual Judgments, p. 943 — 

 Reaction Time for Touch, p. 945— The Sense op Temperature, p. 945 — 

 "Cold" and "Warmth" as Distinct Species of Sense, p. 945— Distribution 

 of Apparatus for Thermal Sensations in the Skin, etc., p. 946 — The Adequate 

 Stimulus, p. 950 — Other Stimuli, p. 954 — Paradoxical Sensation of Cold, p. 

 954— Some Characters of "Cold" and "Warmth" Sensations, p. 955— Rela- 

 tion of Thermal Sensation to Pain, p. 955 — Influence of Areal Extent of 

 Stimulus upon Intensity, p. 956 — The Physiological " Zero-temperature " and 

 "Adaptation," p. 957— The Degree of Projection of Thermal Sensation, 

 p. 958 — The Thermal Sense in relation to Thermotaxis, p. 959 — The 

 Liminal Difference of Intensity of Stimulus, p. 959 — Reaction Time, p. 962 

 —Antagonism of Sensations of "Cold" and "Warmth," p. 965 — Paths of 

 Conduction, p. 965 — Common Sensation, p. 965 — Cutaneous Pains considered 

 in relation to Pain in general, p. 966 — Relation of Pain to Intensity of 

 Reaction, p. 966 — Quality of Cutaneous Pain, p. 967 — Scope of the term 

 " Common Sensation," p. 969— The Viscera and Common Sensation, p. 970 — 

 The Musculo-articular Apparatus and Common Sensation, p. 972 — Nature of 

 "Physical Pain," p. 973 — Action of Painful Stimuli, p. 974— Character of the 

 Motor Reactions provoked, p. 974— The Central Neural Mechanism for 

 Cutaneous Pain, p. 976 — Tickling, p. 976 — Dolorous Reflexes compared with 

 Tactual, p. 977— The Spinal Path of Pain, p. 977 — Associated (Referred) Pains, 

 p. 981 — Interference of Pain with other Sensations, p. 984 — The Peripheral 

 Path of Pain, p. 984—" Pain-Spots " in the Skin, p. 984— Pain and Nerves of 

 Muscular Sense, p. 989 — Pain and Visceral Nerves, p. 990 — Hunger as a type 

 of Visceral Sensation, p. 991— Evolution of Visceral Pain, p. 993 — Cutaneous 

 Pain and Adequate Stimuli, p. 994 — Specific End-organs or Undifferentiated 

 Endings, p. 995— The Forms of "Excess" of Stimulus, p. 997— Summation 

 in Production of Pain, p. 998— " Inertia" of the Neural Apparatus of Pain, 

 p. 998— The Brain and Physical Pain, p. 1000. 



Sense spots. — The surface of the skin is found to be a mosaic of tiny 

 sensorial areas. The elements of this mosaic are set not actually edge 

 against edge as in the retina ; between each element and its neighbours of 

 like function extends a relatively wide interval, insentient when examined 

 by stimuli of little above liminal intensity (Blix). 1 The more locally 

 limited and the nearer to minimal the stimuli, the smaller appears 

 each individual sensifacient field; ultimately, by carrying the tests to 



1 Ztschr.f. Biol, 1885, Bd. xxi. S. 152. Also Goldscheider, Monatsh. f. prakt. Dcrmat., 

 Hamburg u. Leipzig, 1884, Nos. 7-10; Arch. f. Physiol., Leipzig, 1885, Suppl. ; Arch, 

 f. Psychial, Berlin, 1887. Bd. xviii. S. 659; and Eulenburg's " Real-Encyclop. d. ges. 

 Heilkunde," 3te Aufl., art. " Empfindung." 



