Partial tripolar cochlear implant stimulation: Spread of excitation and forward masking in the inferior colliculus

Identifying Impaired Cochlear Implant Channels by Using the Partial- Tripolar Configuration: Implications for Cochlear Implant Fittings

Cochlear-implant spatial selectivity with monopolar, bipolar and tripolar stimulation.

Sharp spatial selectivity is critical to auditory performance, particularly in pitch-related tasks. Most contemporary cochlear implants have employed monopolar stimulation that produces broad electric fields, which presumably contribute to poor pitch and pitch-related performance by implant users. Bipolar or tripolar stimulation can generate focused electric fields but requires higher current t...

Facial Nerve Stimulation in Cochlear Implant Patients

Recovery from forward masking in elderly cochlear implant users.

OBJECTIVE To compare temporal aspects of peripheral neural responses and central auditory perception between groups of younger adult and elderly cochlear implant users. STUDY DESIGN Cohort study. SETTING Academic hospital and cochlear implant center. PATIENTS Adult cochlear implant users aged 28 to 57 years in the younger group (n = 5) and 61 to 89 years (n = 9) in the elderly group. All ...

ON and OFF inhibition as mechanisms for forward masking in the inferior colliculus: a modeling study.

Masking effects of a preceding stimulus on the detection or perception of a signal have been found in several sensory systems in mammals, including humans and rodents. In the auditory system, it has been hypothesized that a central "OFF-inhibitory" mechanism, which is generated by neurons that respond after a sound is terminated, may contribute to the observed psychophysics. The present study c...