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Age‐related wave‐form changes OF VIIIth nerve action potentials in rats
Author(s) -
Crowley David E.,
Schramm Victor L.,
Swain Ronie E.,
Swanson Sylvia N.
Publication year - 1973
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-197302000-00009
Subject(s) - latency (audio) , age groups , audiology , medicine , demography , telecommunications , sociology , computer science
Examination of click‐evoked VIIIth nerve actio potentials (AP) recorded from the round windw of anesthetized rats at ages of one, six, 12, 18 and 24 months reveals that: 1. Visual detectio levels for AP increase by 17.5 db from six to 24 months of age; 2. N 1 voltage increases to a maximum at six or 12 months, depending on click level, and then declines to 24 months; 3. N 2 voltage increases from one to six months but does not show a regular decline thereafter: 4. The voltage of the positive peak separating N 1 from N 2 shows irregular age changes; 5. N 1 latency does not change significantly with advancing age; and 6. N 1 ‐N 2 latency is reduced between one and 12 months but remains relatively stable thereafter.