Introduction and summary of the chapters. Page 5

Chapter one Page 11

Membrane currents in the electroreceptor cells of the glass catfish

Kryptopterus bicirrhis.

Chapter two Page 27

Simultaneous measurements of calcium mobilization and afferent

nerve activity in electroreceptor organs of anesthetized Kryptopterus

bicirrhis

Chapter three Page 37

Spontaneous nerve activity and sensitivity in catfish ampullary

electroreceptor organs after tetanus toxin application

Chapter four Page 45

The dendritic tree of an ampullary electroreceptor organ;

morphology and functional modeling.

General discussion Page 57

References Page 60

Samenvatting in het Nederlands Page 65

Dankwoord Page 69

Curriculum Vitae Page 73

List of publications Page 74