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.
One form of excitable dendritic response is the backpropagating action potential. Following its initiation in the axon, the action potential propagates into the dendrites of the pyramidal neuron, though with some decrement in amplitude as it propagates (Stuart et al., 1997).Another form of dendritic excitability is the dendritically initiated action potential, or dendritic spike.oth the basal and apical dendrites of pyramidal neurons are studded with dendritic spines. These structures serve as the postsynaptic structure at most excitatory synaptic inputs received by the dendritic tree. Some excitatory inputs, however, contact the dendritic shaft in between dendritic spines.