Abstract:
:Acoustic reflex threshold and magnitude were measured for normal-hearing subjects in four experiments under conditions of: (1) tight and relaxed eyelid closure; (2) eyes open and closed in light, focusing on a spot, reading, and solving a visual maze; (3) tactile stimulation; and (4) performing a mental task. Measurements were susceptance change in millimhos for a 220 Hz probe tone. A 1000 Hz pure-tone and broadband noise presented contralaterally were the stimuli. All factors affected reflex results. Eyelid closure enhanced reflex responses with tight closure involving voluntary muscle tension having a greater effect than relaxed closure. Both passive and active visual tasks suppressed the reflex. The mental task resulted in suppression of both reflex threshold and magnitude. Vibrotactile stimulation also resulted in a suppressed reflex. Changes were more pronounced with broadband noise as the reflex eliciting stimulus. Clinical implications are discussed.
journal_name
Ear Hearjournal_title
Ear and hearingauthors
Robinette MS,Snyder KSdoi
10.1097/00003446-198207000-00007subject
Has Abstractpub_date
1982-07-01 00:00:00pages
220-6issue
4eissn
0196-0202issn
1538-4667journal_volume
3pub_type
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