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 NERVE. 

 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- 

 rupter. Electrodes. Method of graphic record . . . .66 



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 86 



The Chemistry of Muscle. 



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

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



