MODERN ASPECTS OF THE RECRUITMENT PHENOMENON

TABLE OF CONTENTS

• Introduction

• Recruitment and hearing aids

• Recruitment and neural lesions

• Partial Recruitment

  1. In severe lesions

  2. In conductive lesions

     1. The normal impedance function

     2. The pathological impedance function

     3. The dynamogram

     4. Loudness in bone conduction

     5. The 2,000 bone conduction dip in otosclerosis

  3. In mixed types of deafness

• Recruitment in cases of herpes oticus

• Recruitment in multiple sclerosis

• Testing technique

  1. Older techniques

  2. Hood's perstimulatory test

  3. Lüscher's test

• Comment

  1. General considerations

  2. Acoustic trauma

  3. Ménière's disease

  4. Fatigue

  5. Eighth-nerve lesion

• Conclusions

• Summary

I. INTRODUCTION  FEW ITEMS in modern audiological research have attracted so much interest as the recruitment phenomenon. The story of its still young history reveals many remarkable features. It will be the purport of this paper to discuss the fallacies of recruitment testing, a routine which has