Table 1

Distribution of ITDMS by the ITD tuning type for apical and basal stimulation in neonatally deafened animals

ITD tuning typePercentage of units (%)
PeakMonotonicTroughUnclassified
Apical unitsITD-sensitive unitsa (n = 52)40.4% (21/52)42.3% (22/52)15.4% (8/52)1.9% (1/52)
|ITDMS| ≤160 μsb (n = 23)38.1% (8/21)45.5% (10/22)62.5% (5/8)N/A
ITDMS (μs)c56 ± 295 (−438 to 688)34 ± 325 (−703 to 736)−58 ± 308 (−676 to 313)N/A
Basal unitsITD-sensitive unitsa (n = 28)25.0% (7/28)67.9% (19/28)3.6% (1/28)3.6% (1/28)
|ITDMS| ≤ 160 μsb (n = 6)28.6% (2/7)21.1% (4/19)0% (0/1)N/A
ITDMS (μs)c27 ± 239 (−222 to 332)78 ± 574 (−801 to 1200)454N/A
  • ITDMS, ITD at the maximum slope.

  • N/A, not available to measure (see “Electrophysiological data analysis” for details).

  • a Only units showing significant STVR (F test, p < 0.01) with pulse rates below 320 pps.

  • b The physiological ITD range of the rat.

  • c Mean ± SD (range).