Homing performances of inexperienced and directionally trained pigeons subjected to olfactory nerve section

1973 ◽  
Vol 83 (1) ◽  
pp. 81-92 ◽  
Author(s):  
S. Benvenuti ◽  
V. Fiaschi ◽  
L. Fiore ◽  
F. Papi
Keyword(s):  
Olfactory Nerve ◽  
Nerve Section

Neurogenesis in olfactory epithelium: loss and recovery of transepithelial voltage transients following olfactory nerve section

1981 ◽  
Vol 45 (3) ◽  
pp. 516-528 ◽  
Author(s):  
P. A. Simmons ◽  
T. V. Getchell
Keyword(s):  
Olfactory Bulb ◽  
Olfactory Epithelium ◽  
Olfactory Receptor ◽  
Time Course ◽  
Olfactory Nerve ◽  
Nerve Section ◽  
Retrograde Degeneration ◽  
Transepithelial Voltage ◽  
Receptor Neurons ◽  
Voltage Transients

1. Unilateral olfactory nerve section was performed on the salamander, Ambystoma tigrinum. Physiological recordings and macroscopic observations were made to investigate the physiological correlates of functional recovery in the olfactory epithelium. 2. Slow transepithelial voltage transients, Veog, evoked by several odorous stimuli systematically decreased in amplitude during the initial 7 days and were not recorded at 10 days following nerve section, suggesting retrograde degeneration of receptor neurons. This was true for negative Veog(-), and positive, Veog(+), response components. Responses obtained from the untreated contralateral side of each animal remained similar to nonaxotomized controls. 3. Progressive recovery of the voltage transients was studied at 24, 45, 80, and 100 days following nerve section. At all stages of recovery, the wave form and time course of the responses were characteristic for each stimulus. This suggested that the response properties of the newly differentiated neuronal population were similar to those of the mature population. 4. At 100 days, response amplitudes evoked by all stimuli were similar to control values at all recording sites on the epithelial surface. The simultaneous loss and recovery of positive and negative components of the Veog indicated that the sources of both are dependent on the presence of functionally mature olfactory receptor neurons. 5. Visual inspection indicated that the olfactory nerve was reconstituted and reconnected to the olfactory bulb between 30-60 days following transection. The fact that physiological activity was recorded in the epithelium prior to this event suggests that molecular recognition and sensory transduction are not dependent on connectivity with the olfactory bulb. 6. It is concluded that physiological recovery of the olfactory receptor cell population occurs following axotomy. The time course of recovery was consistent with morphological evidence (see Ref. 57), indicating that newly differentiated receptor neurons are derived from cells in the basal region of the epithelium and replace the population lost through retrograde degeneration.

Post-traumatic parosmia treated by olfactory nerve section

1990 ◽  
Vol 4 (4) ◽  
pp. 358-358 ◽  
Author(s):  
Partha Sarangi ◽  
Tipu Z. Aziz
Keyword(s):  
Olfactory Nerve ◽  
Nerve Section ◽  
Post Traumatic

Two-way avoidance learning in pigeons after olfactory nerve section

1974 ◽  
Vol 13 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Robert S. Hutton ◽  
Bernice M. Wenzel ◽  
Theodore Baker ◽  
Martha Homuth
Keyword(s):  
Avoidance Learning ◽  
Olfactory Nerve ◽  
Nerve Section

scholarly journals Electrical Activity and Histological Change in the Degenerating Olfactory Epithelium

1965 ◽  
Vol 48 (4) ◽  
pp. 559-569 ◽  
Author(s):  
Sadayuki F. Takagi ◽  
Toshi Yajima
Keyword(s):  
Electrical Activity ◽  
Olfactory Epithelium ◽  
Histological Change ◽  
Supporting Cell ◽  
Olfactory Nerve ◽  
Supporting Cells ◽  
Nerve Section ◽  
Histological Changes ◽  
Olfactory Cells ◽  
Electrical Responses

Electrical activity and histological changes were studied in the degenerating olfactory epithelium of the bullfrog after the olfactory nerve had been sectioned. After nerve section, the electrical responses to odors disappeared in the olfactory epithelium in 8 days in the summer, in 11 days in the early autumn, and in 16 days in the early winter. In the degenerating olfactory epithelium a striking decrease in the number of olfactory cells was found, but not of supporting cells. The ratio of the number of olfactory cells to that of supporting cells was found to decrease from 5 or 6 to below 2 after the nerve section. At a ratio below 2, the electrical responses to odor disappeared. The histological changes in the bullfrog are compared with those in the mouse and rabbit. The localization of the olfactory pigment and the electrical activity of the supporting cell are discussed. It was concluded that all three types of responses to odors originate from the activity of the olfactory cell.

Motion-induced aversions during and after recovery from olfactory nerve section in mice

1993 ◽  
Vol 53 (4) ◽  
pp. 631-633 ◽  
Author(s):  
Norman E. Kinney ◽  
John W. Wright ◽  
Joseph W. Harding
Keyword(s):  
Olfactory Nerve ◽  
Nerve Section
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