1 / 13

Hearing Sensitivity in the Katydid, Amblycorypha rotundifolia

Hearing Sensitivity in the Katydid, Amblycorypha rotundifolia. An Undergraduate Research Project by Dawn Lajoie at UNC-Asheville. Amblycorypha rotundifolia. Lives in shrubs and bushes Capable of short flights Mid frequency song Bout synchrony Unusual pair formation. Electrode Placement.

kalani
Download Presentation

Hearing Sensitivity in the Katydid, Amblycorypha rotundifolia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hearing Sensitivity in the Katydid, Amblycorypha rotundifolia An Undergraduate Research Project by Dawn Lajoie at UNC-Asheville

  2. Amblycorypha rotundifolia • Lives in shrubs and bushes • Capable of short flights • Mid frequency song • Bout synchrony • Unusual pair formation

  3. Electrode Placement en route to the brain Sensory information from the ear Prothoracic Ganglion

  4. Sound stimulus 10 kHz, 55 dB SPL Neural Recording Latency • Hook electrode on neck connective • Sound stimulus of varying intensity & frequency • Thresholds based on 60% positive response criteria

  5. 10kHz 11kHz 12kHz 13kHz 9 8 7 6 Average Number of Spikes 5 4 3 2 1 0 0 10 20 30 40 SPL re Threshold (dB) Average Spikes per Stimulus

  6. 10kHz 11kHz 12kHz 13kHz 24 22 20 Average Latency (ms) 18 16 14 12 0 10 20 30 40 SPL re Threshold (dB) Latency of Neural Response

  7. Average Spikes per Stimulus

  8. Latency of Neural Response

  9. Summary of Current Findings • Hearing sensitivity corresponds to male and female acoustic signal • Male and female hearing sensitivity is closely matched • A. rotundifolia can probably hear bats • The magnitude of A. rotundifolia neural response increases with the intensity of the stimulus

  10. What’s Next? • Analysis of double electrode recordings • Rewrite and submit my paper to a primary journal (i.e. make Dr. Forrest happy) • Medical school???????

  11. Heartfelt Thanks To… • Dr. Forrest • Biology Department • Undergraduate Research Program • My Family

More Related