CONTENTS. ix 



CHAPTER II. 

 The Contractile Tissues. 



PAGE 



§ 39. The movements of the body carried, out by means of various kinds of 



contractile tissues 51 



SECTION I. 



The Phenomena of Muscle and Nekve. 



Muscular and Nervous Irritability. 



§ 40. Irritability ; contractility ; stimuli 53 



§ 41. Independent muscular irritability ; action of urari . . . .54 



§ 42. Simple and tetanic contractions 55 



§ 43. The muscle-nerve preparation 55 



§ 44. Various forms of stimuli. Induction Coil. Key. Magnetic Inter- 



ruptor. Electrodes. Method of graphic record . . . .56 



The Phenomena of a Simple Muscular Contraction. 



§ 45. The muscle-curve. Myographs. Time measurements. Signals . 65 



§ 46. Analysis of a simple muscle- curve 71 



§ 47. Variations of the muscle-curve. The shortening accompanied by 



thickening 74 



§ 48. Simple muscular contractions rare in the living body . . . .75 



Tetanic Contractions. 



§ 49. Tetanic contractions. Analysis of the curve of tetanus . . .75 



§ 50. Various degrees of tetanic contractions 79 



§ 51. Diminution and disappearance of irritability after death . . .80 



SECTION II. 



On the Changes which take place in a Muscle during a 



Contraction. 



The Change in Form. 



§ 52. Gross structure of muscle, arrangement of muscular fibres, blood 



vessels and nerves 82 



§ 53. The wave of contraction ; its length, velocity, and other characters . 83 

 § 54. The visible changes which take place in a muscular fibre during a 



contraction 85 



The Chemistry of Muscle. 



§ 55. Contrast of living and dead muscle ; rigor mortis . . . .86 

 § 56. Chemical bodies present in dead muscle ; myosin, syntonin . . 87 



