Abstract:
:The incidence and severity of audiogenic seizures in kanamycin (KM)-treated rat pups, from a Wistar strain which is inherently seizure-resistant, was analyzed as a function of (a) postnatal age at the time of KM injection (i.p.) and (b) KM dosage. The vigor of the pinna reflex response on postnatal day (PND) 28 was correlated with (a) age at the time of injection, (b) dosage and (c) individual audiogenic seizure severity scores on PND 28 or PND 32. The data indicate that PNDs 9-12 are the developmental period when the rat has its greatest sensitivity to induction of susceptibility to audiogenic seizures by KM. The pinna reflex data suggest that cochlear vulnerability to KM intoxication is also greatest during this period. The optimum dosage for the induction of susceptibility was 100 mg/kg X 4 days. Use of higher doses resulted in a reduction of both incidence and severity of audiogenic seizures. The pinna reflex generally exhibited a supranormal vigor in animals having the most severe seizures. The behavioral attributes of induced audiogenic seizures at postnatal ages of 28 and 32 days are described and discussed.
journal_name
Hear Resjournal_title
Hearing researchauthors
Pierson MG,Swann JWdoi
10.1016/0378-5955(88)90142-6subject
Has Abstractpub_date
1988-01-01 00:00:00pages
1-10issue
1eissn
0378-5955issn
1878-5891pii
0378-5955(88)90142-6journal_volume
32pub_type
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