Late acoustic evoked potentials
Late acoustic evoked potentials (SAEP) are a subgroup of acoustic evoked potentials and have their source in the cerebral cortex, hence also called cortical evoked response audiometry, CERA . The shaft designations are P1, N1, P2, N2 (running time 50 ms - 300 ms).
Areas of application
They are used clinically to examine the function of the entire auditory pathway from the ear to the cerebral cortex . Since they can also be measured in a frequency-specific manner, a kind of audiogram could be created without the active participation of the test person , which, however, takes a long time due to the long term of the potentials and the repetitions of measurements for averaging. In contrast to the FAEP , the SAEP cannot be derived under sedation or anesthesia . The test subjects must have good vigilance , but not too much brain activity that changes the EEG . For controlled maintenance of vigilance z. It is used, for example, to read simple literature or watch simply structured videos.
The SAEP waves cannot be assigned to a specific place of origin.
See also
literature
Konrad Maurer, Nicolas Lang, Joachim Eckert: Practice of evoked potentials. Steinkopff-Verlag, 32005. ISBN 3-7985-1500-X