3 Basic principles of instrumentation and signal-processing INTRODUCTION The practising clinician does not need to know exactly how an evoked-potential (EP) system works, but he or she does need to…
5 ECochG in hearing disorders ECochG IN CONDUCTIVE HEARING LOSS Pathophysiology Hearing levels are elevated in patients with conductive hearing loss due to affected sound transmission and reduction of the…
2 Anatomy, physiology, and classification of the generators of auditory evoked potentials ANATOMY OF THE EAR AND THE AUDITORY PATHWAY External auditory meatus and the middle ear The anatomy of…
17 Monitoring auditory evoked potentials during neuro-otologic surgery CLINICAL PROBLEM Intra-operative monitoring of CM and AP can record objectively the results of stapedectomy operations at every step of the procedure….
12 ERA in hearing screening in neonates and infants CLINICAL PROBLEM There is general agreement about the desirability of early detection and management of hearing loss. Even a comparatively mild…
8 Middle-latency responses (MLR) INTRODUCTION Middle-latency responses (MLR) recorded from the scalp have latencies in the range 10–50 ms. Some of the potentials are of myogenic origin, and most respond…
15 ERA in neuro-otologic diagnosis CLINICAL PROBLEM The ERA tests are valuable in differentiating cochlear from retrocochlear hearing loss, confirming lesions, and detecting unsuspected retrocochlear pathology (Robinson & Rudge 1983)….
13 ERA in the ‘difficult-to-test child’ CLINICAL PROBLEM Until the infant is 4 months of age, the quality of the auditory responses is little dependent on mental development, and only…
10 Other long latency responses GENERATORS Of these other responses, the one that is most useful in the auditory field is the vertex positive component P3 or P300 with a…
18 Electrically evoked potentials in cochlear stimulation CLINICAL PROBLEM Population Electrical stimulation of the cochlear nerve with unipolar and bipolar electrode systems has been devised as a cochlear prosthesis in…
