Auditory steady-state evoked potentials vs. compound action potentials for the measurement of suppression tuning curves in the sedated dog puppy.
Auditory steady-state evoked potential (ASSEP) tuning curves were compared to compound action potential (CAP) tuning curves, both measured at 2 Hz, using sedated beagle puppies. The effect of two types of masker (narrowband noise and sinusoidal) on the tuning curve parameters was assessed. Whatever the masker type, CAP tuning curve parameters were qualitatively and quantitatively similar to the ASSEP ones, with a similar inter-subject variability, but with a greater incidence of upward tip displacement. Whatever the procedure, sinusoidal maskers produced sharper tuning curves than narrow-band maskers. Although these differences are not likely to have significant implications for clinical work, from a fundamental point of view, their origin requires further investigations. The same amount of time was needed to record a CAP and an ASSEP 13-point tuning curve. The data further validate the ASSEP technique, which has the advantages of having a smaller tendency to produce upward tip shifts than the CAP technique. Moreover, being non invasive, ASSEP tuning curves can be easily repeated over time in the same subject for clinical and research purposes.
Markessis
Emily
E
Faculté de Médecine, Université Libre de Bruxelles, Brussels, Belgium. emarkess@ulb.ac.be
Poncelet
Luc
L
Colin
Cécile
C
Hoonhorst
Ingrid
I
Collet
Grégory
G
Deltenre
Paul
P
Moore
Brian C J
BC
D000161:Acoustic Stimulation; D000200:Action Potentials / Q000502:physiology*; D000367:Age Factors; D000465:Algorithms; D000818:Animals; D001309:Auditory Threshold / Q000502:physiology*; D003056:Cochlear Nerve / Q000502:physiology*; D004285:Dogs; D004569:Electroencephalography; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D008297:Male; D010470:Perceptual Masking / Q000502:physiology*; D010898:Pitch Perception / Q000502:physiology*; D011571:Psychoacoustics; D012815:Signal Processing, Computer-Assisted; D012984:Software; D013018:Sound Spectrography; D013045:Species Specificity