Using the far-field averaging method, observations were made on the early, middle, and late components of auditory evoked responses (AER) in rat pups. These AERs, as well as a myogenic response, all appeared at nearly the same age—the 12th to 14th postnatal day. Latency decreased and amplitude increased rapidly during the two-week period following the first appearance of responses. Early in the development of these responses a new wave appeared that had a shorter latency than wave I.
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References
1.
PictonTWHillyardSAKrauszHI: Human auditory evoked potentials: I. Evaluation of components. Electroencephalogr Clin Neurophysiol1974; 36: 179–190.
2.
JewettDLRomanoMN: Neonatal development of auditory system potentials averaged from the scalp of rat and cat. Brain Res1971; 36: 101–115.
3.
BuresJ, cited by HassmannováJMyslivecěkJ: Maturation of the primary cortical response to stimulation of medial geniculate body. Electroencephalogr Clin Neurophysiol1967; 22: 547–555.
4.
MairIWSElverlandHHLaukliE: Development of early auditory-evoked responses in the cat. Audiology1978; 17: 469–488.
5.
HassmannováJMyslivecěkJ: Maturation of the primary cortical response to stimulation of medial geniculate body. Electroencephalogr Clin Neurophysiol1967; 22: 547–555.
6.
OrnitzEMRitvoERCarrEM: The variability of the auditory averaged evoked response during sleep and dreaming in children and adults. Electroencephalogr Clin Neurophysiol1967; 22: 514–524.
7.
BickfordRGJacobsonJLCodyTR: Nature of average evoked potentials to sound and other stimuli in man. Ann NY Acad Sci1964; 112: 204–218.
8.
HoffmanHSSearleJL: Acoustic and temporal factors in the evocation of startle. J Acoust Soc Am1968; 43: 269–282.
9.
AghajanianGKBloomFE: The formation of synaptic junctions in developing rat brain: A quantitative electron microscopic study. Brain Res1967; 6: 716–727.
10.
ShahSNBhargavaVKJohnsonRC: Latency changes in brain stem auditory evoked potentials associated with impaired brain myelination. Exp Neurol1978; 58: 111–118.
11.
EayrsJTGoodheadB: Postnatal development of the cerebral cortex in the rat. J Anat1959; 93: 385–401.
12.
CrainSM: Development of electrical activity in the cerebral cortex of the albino rat. Proc Soc Exp Biol Med1952; 81: 49–51.
13.
PujolRHildingD: Anatomy and physiology of the onset of auditory function. Acta Otolaryngol1973; 76: 1–10.
14.
CrowleyDEHepp-ReymondM-C: Development of cochlear function in the ear of the infant rat. J Comp Physiol Psychol1966; 62: 427–432.
15.
PujolR: Development of tone-burst responses along the auditory pathway in the cat. Acta Otolaryngol1972; 74: 383–391.
