The characteristics of the electro-olfactogram (EOG): its loss and recovery following olfactory nerve section in rainbow trout (Salmo gairdneri).

摘要: Electro-olfactograms (EOGs) were recorded from both sensory and non-sensory epithelia on the olfactory lamellae other areas within rosette of rainbow trout (Salmo gairdneri). The EOG induced by amino acids was a monophasic negative voltage composed phasic component which declined to steady level (tonic component) that maintained throughout stimulus duration. time period (2 min) for complete recovery obtained applying two identical stimuli (10(-5) mol/liter L-serine 5 s) successively at increasing intervals. response increased nearly exponentially with concentration no saturation reached. Gradual deterioration receptor cells occurred 14 days after nerve section (axotomy) as indicated phospholipid staining. Regeneration started 56 postaxotomy, reached approximately normal density elongate form mature neurons 84 days. In axotomized fish magnitude decreased relative controls 7 minimal sensitivity between 28 postaxotomy. EOGs not evoked nor L-leucine in most 17-22 Restoration coincided morphological repopulation only 50% control values 230 responses HCl indistinguishable each other, indicating are likely be their primary origin.