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.
Stimulus energy is first transformed into graded or receptor potentials and the process by which a stimulus is transformed into an electrical response is called stimulus transduction. Each receptor is specific to a certain type of stimulus, which is called its adequate stimulus. Specificity also exists in the range of stimulus energies that the receptor responds to. However, a receptor can be activated by a nonspecific stimulus if its intensity is sufficiently high.