Across
- 1. ABR and ECochG are AERs of this origin
- 4. these filters remove lower frequencies from the recording
- 8. these cells in the auditory cortex have large apical (top) dendrites that are oriented perpendicularly to the surface of the brain (but are parallel to eachother)
- 11. this nerve connects to the hair cells at the base and travels through the habenula perforate to the modiolus; cell bodies form the spiral ganglion
- 15. function of the amplifier; key in enhancing the signal; electrical activity that is the same at each is eliminated or rejected
- 17. attaching an electrode to the skin generates this, which adds to the noise from which the EP is extracted
- 18. presence of acoustic stimulus evokes a change in the electrical current flowing through cells
- 21. the time period after presentation of each stimulus during which an AER is collected
- 22. the passive transmission of electric fields through biological issue from an underlying electrical current generator
- 26. these hair cells are about sensory; primarily drive spiral ganglion fibers
- 29. a step-like, direct current voltage that closely follows stimulus in time
- 30. the sampling rate or frequency must be at least 2x the highest frequency within the signal spectrum
- 33. these hair cells are about movement and amplification
- 35. configuration with positive and negative voltage separated by space
- 36. voltages spread through the brain by this kind of conduction
- 37. stimulus designed to compensate for the traveling wave delay
- 38. driven by shearing of stereocilia (primarily OHC and little IHC)
Down
- 2. this type of potential originates from the spiral ganglion cells of the auditory nerve, does not mimic stimulus of follow envelope like CM & SP
- 3. changes in membrane potential of axons that last typically about 1 ms
- 5. diaphragm inward, negative pressure wave, pulls out on the stapes footplate, basilar membrane moves upward
- 6. carries neurons from the PVCN to the contralateral CN and to the SOC
- 7. the rise time+plateau time+fall time
- 9. carries neurons from the AVCN to the ipsilateral and contralateral medial superior olive (MSO) and lateral superior olive (LSO)
- 10. MLR, ALR, and P300 are AERs of this origin
- 12. stimulus with abrupt onset with brief duration
- 13. carries neurons from the DCN to contra IC bypassing the SOC
- 14. these filters remove higher frequencies from the recording
- 16. a measurable activity following an applied stimulus; response versus potential
- 19. fast voltage changes (action potentials or spikes) that travel along the cell's axons (nerve fibers)
- 20. stimulus with 4-5 cycles of pure tone signals
- 23. slow localized membrane voltage changes resulting from communication between nerve cells (postsynaptic potentials)
- 24. carries the PVCN neurons through the LL to terminate in the IC
- 25. these are generators, not nuclei
- 27. changes in EEG that are time-locked to changes in acoustic stimulus
- 28. continuous electrical activity in the brain reflecting its state
- 31. diaphragm outward, positive pressure wave, pushes in on the stapes footplate, deflects BM downward
- 32. changes lasting about 10-15 ms
- 34. changing electrical charge that looks like a sinusoidal wave