j Contents 



5. Electrical Potentials of the Brain 88 



/. Electroencephalography, 88; 2. The Central Nervous System, 

 89 ; 3. Feedback Loops and the Nervous System, 92 ; 4. The Electro- 

 encephalographic Patterns, 96; 5. Abnormal Electroencephalo- 

 graphs Patterns, 100 ; 6. Summary, 1 02 



6. Neural Mechanisms of Hearing 104 



/. Place and Telephone Theories, 104; 2. Cochlear Mechanism 

 of Neural Excitation, 108; 3. Arm Analogs and Neural Sharpen- 

 ing, 111; 4. Cortical Representation, 113; 5. Summary of 

 Hearing, 1 1 7 



7. Neural Aspects of Vision 119 



A Color Discrimination, 119; 2. Cellular Mechanisms, 124; 

 3. Direct Neural Measurements, 129; 4. Neural Sharpening and 

 Analyses, 131; 5. Cortical Representation, 133; 6. Summary 

 of Vision, 135 



8. Muscles 137 



1. Introduction, 137; 2. Anatomy, 138; 3. Physical Changes 

 During Muscular Contraction, 141; 4. Muscle Chemistry, 147; 

 5. Electron-Microscope Studies of Muscles, 151; 6. Summary, 154 



9. Mechanical and Electrical Character of the Heart Beat 157 



1. Role of the Vertebrate Circulatory System, 157; 2. Blood 

 Pressures and Velocities, 1 58 ; 3. The Vertebrate Heart, 161; 



4. The Heart Sequence, 1 63 ; 5. Electrocardiography, 168 ; 5. 

 Physics of Dipoles, 171; 7. F^c/or Electrocardiography, 1 75 ; 



5. Summary, 177 



C. Physical Microbiology 



10. Cellular Events Produced by Ionizing Radiations 185 



/. Ionizing Radiation as a Biological Tool, 1 85 ; 2. Dosage, 

 187; 3. Mitosis and Meiosis, 189; 4. Visible Cellular Effects, 

 191; 5. Genetic Effects, 1 96 ; 6. Evolution, Mutation and 

 Fall-out, 200 ; 7. Summary, 20 1 



