The effects of low- and high-frequency suppressors on psychophysical estimates of basilar-membrane compression and gain

2007 ◽  
Vol 121 (5) ◽  
pp. 2832-2841 ◽  
Author(s):  
Ifat Yasin ◽  
Christopher J. Plack
Keyword(s):  
High Frequency ◽  
Basilar Membrane ◽  
Basilar Membrane Compression

Tinnitus: some thoughts about its origin

1984 ◽  
Vol 98 (S9) ◽  
pp. 31-37 ◽  
Author(s):  
J. J. Eggermont
Keyword(s):  
Hair Cells ◽  
High Frequency ◽  
Basilar Membrane ◽  
Stimulus Frequency ◽  
Low Frequency ◽  
Nerve Fibers ◽  
Ear Ossicles ◽  
Stimulus Transduction ◽  
Low Levels ◽  
Inner Ear Fluids

An auditory sensation follows generally as the result of the sequence stimulus, transduction, coding, transformation and sensation. This is then optionally followed by perception and a reaction. The stimulus is usually airborne sound causing movements of the tympanic membrane, the middle ear ossicles, the inner ear fluids and the basilar membrane. The movements of the basilar membrane are dependent on stimulus frequency: high frequency tones excite only the basal part of the cochlea, regardless of the stimulus intensity; low frequency tones at low levels only excite the so-called place specific region at the apical end but at high levels (above 60–70 dB SPL) cause appreciable movement of the entire basilar membrane. Basilar membrane tuning is as sharp as that of inner hair cells or auditory nerve fibers (Sellick et al., 1982) at least in the basal turn of animals that have a cochlea in physiologically impeccable condition.

Late Waves in the Response Recorded from the Intracranial Portion of the Auditory Nerve in Humans

1993 ◽  
Vol 102 (12) ◽  
pp. 945-953 ◽  
Author(s):  
Aage R. Møller
Keyword(s):  
Auditory Nerve ◽  
High Frequency ◽  
Basilar Membrane ◽  
Opposite Polarity ◽  
Surgical Trauma ◽  
Moderate Degree ◽  
Speech Discrimination ◽  
Eighth Nerve ◽  
Pure Tone Threshold ◽  
Click Polarity

We showed in previous studies that the click-evoked responses from the exposed eighth nerve in some patients contain quasiperiodic components that appear in the interval between 4 and 16 milliseconds after the click stimulus, and that the phase of these oscillatory components reverses when the click polarity is reversed. When the responses to clicks of opposite polarity are subtracted from each other, these late waves appear as a prolonged quasiperiodic oscillation with a frequency around 700 Hz. These late components appear more frequently in patients with high-frequency hearing losses than in patients with normal hearing. We have attributed these components to prolonged and in-phase oscillations of a large portion of the basilar membrane, possibly caused by the generation of standing waves on the basilar membrane. The results of the present study show that these oscillations correspond closely in both frequency and phase to the late oscillations that are seen in the cross-correlograms of the responses from the exposed eighth nerve to pseudorandom noise. The finding that similar quasiperiodic components can be retrieved from the responses from the exposed eighth nerve to both transient and continuous sounds is taken as an indication that the neural activity that these components represent reflects some general property of the cochlear frequency analyzer. We also found that the speech discrimination is not noticeably different in patients with such waves compared with what it is in patients with similar hearing loss who do not have such waves. This is taken as an indication that spectral analysis in the cochlea is less important in speech discrimination than previously assumed. The importance of timing of auditory nerve activity for speech perception is indicated by the finding that surgical trauma of the intracranial portion of the auditory nerve that only causes a moderate degree of deterioration of the pure tone threshold reduces speech discrimination scores to zero.

Sensory transduction and frequency selectivity in the basal turn of the guinea-pig cochlea

1992 ◽  
Vol 336 (1278) ◽  
pp. 317-324 ◽  
Keyword(s):  
Guinea Pig ◽  
Hair Cells ◽  
High Frequency ◽  
Basilar Membrane ◽  
Receptor Potential ◽  
Outer Hair Cells ◽  
Sensory Transduction ◽  
Voltage Response ◽  
Operating Range ◽  
Dc Component

Receptor potentials recorded from outer hair cells (ohc ) and inner hair cells (ihc) in the basal highfrequency turn were com pared. The dc component of the ihc receptor potential is maximized to ensure that ihcs can signal a voltage response to high-frequency tones. The ohc dc component is minimized so that ohcs transduce in the most sensitive region of their operating range. The phase and magnitude of ohc receptor potentials were recorded as an indicator of the magnitude and phase of the energy which is fed back to the basilar membrane to provide the basis for the sharp tuning and fine sensitivity of the cochlea to tones. IHC receptor potentials were recorded to assess the net effect of the feedback on the mechanics of the cochlea. It was concluded that ohcs generate feedback which enhances the ihc responses only at the best frequency. At frequencies below cf, ihc dc responses are elicited only when the ohc ac responses begin to saturate.

In vivomeasurement of basilar membrane vibration in the unopened chinchilla cochlea using high frequency ultrasound

2017 ◽  
Vol 141 (6) ◽  
pp. 4610-4621 ◽  
Author(s):  
Thomas G. Landry ◽  
Manohar L. Bance ◽  
Jeffrey Leadbetter ◽  
Robert B. Adamson ◽  
Jeremy A. Brown
Keyword(s):  
High Frequency ◽  
Basilar Membrane ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound ◽  
Membrane Vibration

Relationship between basilar membrane compression estimates and masking release.

2011 ◽  
Vol 129 (4) ◽  
pp. 2589-2589
Author(s):  
Melanie J. Gregan ◽  
Andrew J. Oxenham ◽  
Peggy B. Nelson
Keyword(s):  
Basilar Membrane ◽  
Masking Release ◽  
Basilar Membrane Compression
Sign in / Sign up

Export Citation Format

Share Document