10:50AM BST 09 Jun 2014. â¢ DONALD DUCK was created by Walt Disney when he heard Clarence Nash doing his duck voice while reciting Mary Had a Little Lamb. Disney wanted a character that was more negative than Mickey Mouse, so the bad-tempered Duck was born.
Auditory brainstem response (ABR) audiometry is a neurologic test of auditory brainstem function in response to auditory (click) stimuli. First described by Jewett and Williston in 1971, ABR audiometry is the most common application of auditory evoked responses. Test administration and interpretation is typically performed by an audiologist. This article provides an overview of the test and its most common applications.
Unconditioned Response Conditioned and unconditioned responses are behaviors that result from specific stimuli. An unconditioned response is behavior that occurs naturally due to a given stimulus. However, a stimulus prompts a conditioned response only when someone has come to associate that stimulus with another. For example, when a person yelps upon being bitten by an insect, the yelp is an unconditioned response.