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[A study on cervical reflex induced by click stimuli in cats]
Y Masaki1, K Ogasawara, K Atumi
1Department of Otorhinolaryngology, Juntendo Izu-Nagaoka Hospital, Shizuoka.
Nihon Jibiinkoka Gakkai Kaiho
|November 17, 2001
Summary
This study investigated how click stimuli affect the feline cervical cord, finding responses primarily at C3, likely via the spinal accessory nerve. These findings suggest a non-auditory pathway is involved in processing click stimuli.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Spinal Cord Research
Context:
- While the effects of click stimuli on cervical muscles are known, their impact on the cervical cord remains unstudied.
- This research addresses the knowledge gap regarding cervical cord responses to auditory stimuli.
Purpose:
- To determine the specific response of the feline cervical cord to click stimuli.
- To identify the location and characteristics of these responses within the cervical cord.
Summary:
- Auditory brainstem response (ABR) thresholds were measured in ten artificially ventilated cats.
- Click stimuli (1-20 Hz) were applied to exposed cervical cords (C3-C6), with electrodes placed to target the spinal nucleus of the accessory nerve.
- Responses were observed at C3, peaking at 4.89-5.10 ms with 105 dBSPL (1 Hz) clicks, showing latency changes with sound pressure and disappearing at higher frequencies (≥20 Hz).
Impact:
- Identifies the spinal nucleus of the accessory nerve at C3-C5 as responsive to click stimuli.
- Suggests a non-auditory pathway mediates these responses, particularly involving the sternocleidomastoid muscle.
- Provides foundational data for understanding auditory-evoked responses in the cervical spinal cord.