Patient | Sex, age | Symptomatic ear | Duration (y) | Sound threshold frequency (dB (kHz)) | p13/n23 @ 75 dB | p13/n23 threshold (dB) |
---|---|---|---|---|---|---|
1 | M, 44 | L | 8 | 110 (0.5 ) | 1.17 | 65 |
2 | F, 28 | L | 11 | 105 (1, 2) | 0.86 | <70 |
3 | F, 22 | R1-150 | 5 | 100 (1) | 1.04 | <60 |
4 | M, 48 | R | 8 | 105 (0.5 ) | 1.12 | <60 |
5 | M, 63 | L | 12 | 1-151 | 0.97 | <751-152 |
6 | M, 57 | R | 18 | 1101-153 | >1.131-154 | <60 |
L1-150 | 18 | 1101-153 | 0.271-154 | <80 | ||
7 | F, 56 | L1-150 | 10 | 110 (0.5, 1) | 1-160 | 77 |
↵1-150 Surgical exploration of the middle ear, which in all three cases was normal.
↵1-151 patient developed oscillopsia with 90 dB stimuli.
↵1-152 Not tested with clicks of <75 dB intensity.
↵1-153 Frequency not recorded.
↵1-154 Tested at 70 dB NHL, following attempted stapediopexy on the left.
↵1-160 Responded in one of two runs to clicks of 73 dB intensity.
Sound threshold=intensities and frequencies required to produce eye movements; p13-n23 @ 75 dB=the peak to peak amplitude of the p13-n23 potential expressed as a ratio of the mean background rectified EMG level; p13-n23 threshold=threshold for evoking these potentials in the ipsilateral sternocleidomastoid muscle.