1. Editorial

   • Stewart G. Wolf

   EditorialNotes Pages: 211 - 212

2. Psychophysiological and behavioral differences as a function of age and Parkinson’s disease

   • Wolfram Boucsein
   • Annette Valentin
   • John J. Furedy

   Papers Pages: 213 - 225

3. Cortical control of sinus arrhythmia in man studied by spectral analysis

   • Radu M. Negoescu
   • Irma Eva Csiki
   • Stewart Wolf

   Papers Pages: 226 - 238

4. The problem of switching in conditional behavior

   • Wanda Wyrwicka

   Papers Pages: 239 - 257

5. Two-component arterial blood pressure conditional response in rat

   • David C. Randall
   • David R. Brown
   • Karen R. Powell

   Papers Pages: 258 - 269

6. Psychotraumatology: A two-factor formulation of posttraumatic stress

   • George S. Everly

   Papers Pages: 270 - 278

7. Coronary blood flow in dogs: Effect of person

   • Joseph E. O. Newton
   • Walter Ehrlich

   Historical Section Pages: 280 - 286

8. Book reviews

   • Louis Jolyon West
   • Stewart Wolf
   • James E. Skinner

   BookReview Pages: 287 - 294

9. Abstracts from the annual meeting of the pavlovian society

   Abstracts Pages: 295 - 310