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Peri aural sound evoked potentials in guinea pig

, : Peri aural sound evoked potentials in guinea pig. Acta Physiologica Sinica 34(4): 373-378

Averaged sound-evoked potentials were recorded from the periaural region of waking guinea pig with needle electrode inserted into the subcutaneous tissue or the underlying muscles. A train of 5 clicks with a total duration of 5 ms and a maximum intensity of 110 dB served as the sound stimulus. The typical shape of the potential was a positive-negative diphasic wave lasting 5-10 ms. The latency at high stimulus intensity was 6-7 ms, while the maximum amplitude might reach 500 .mu.V. The response was bilateral on monaural stimulation with a threshold 60-70 dB above the threshold of hearing and capable of following a repetition rate up to 20/s without much decrease in amplitude. The appearance and changes of the periarual potentials were in good correspondency with those of the pinna reflex. Both the pinna reflex and the periaural potential could be completely abolished by either general anesthesia or local paralysis of the periaural muscles. The myogenic origin of such potentials was supported. The latency of the pinna reflex was about 15 ms, consequently a 6-7 ms latency for the potential as the 1st sign of the reflex effector activity was reasonable. The nature of this kind of myogenic potentials and its relation to the postaural sound-evoked potentials recorded in human subjects were discussed.


Other references

Henning, E., 1926: Conditions predisposing to black rust epidemics. After a brief, popular description of the life-history of black rust of wheat, the writer defines the various environmental conditions predisposing to epidemics of the disease. Sharply alternating day and night temperatures during the summer month...

Anderson Eric, 1993: Submarine-fan delta depositional environment of the Pennsylvania Redfork Sandstone. AAPG Bulletin 77(9): 1570

Lindenberg Hans G., 1972: Methods for the Study of Marine Benthos (IBP Handbook No. 16). Sedimentology 19(1-2): 150-151

Lovinger R.D.; Kaplan S.L.; Grumbach M.M., 1975: Congenital hypo pituitarism associated with neo natal hypo glycemia and micro phallus 4 cases secondary to hypothalamic hormone deficiencies. Journal of Pediatrics 87(6 (PART 2)): 1171-1181

Bonandi, L.; Niccoli, L.; Ettori, F.; Leonzi, O.; Visioli, O.; Meli, M.; Brugger, J.P.; Odermatt, R.; Hahn, C., 1986: Evaluation of the volume and ejection fraction of the right ventricle by a theory of measurement applied to thermodilution. Cardiologia 31(8): 571-578

Affleck, 1985: Critical behavior of two-dimensional systems with continuous symmetries. Physical Review Letters 55(13): 1355-1358

Constantinides, G.; Madelain, F.; François, P., 1976: Results of photocoagulation treatment of bullous retinoschisis. Bulletin des Societes D'ophtalmologie de France 76(9-10): 817-819

Martinez, M.L., 2010: Forced prostitution and compensation: a discussion of the "comfort women" in Japan. Periplus 11: 26-42

Boston A.C., 1975: Beef cross breeding systems pre weaning comparisons. Journal of Animal Science 41(1): 246

Doty, C.; Gilliam, J.; Parsons, J., 1986: Stream water level control affects irrigation water supply and quality. American Society of Agricultural Engineers Microfiche collection: (fiche no 86-2581)