RESPONSE LATENCY OF EXTERNAL AND CENTRAL NUCLEI IN THE AWAKE MARMOSET INFERIOR COLLICULUS

Inferior Colliculus;Latency;Biomedical Engineering

Chen, MinminYoung, Eric D. ;

Johns Hopkins University

关键词: Inferior Colliculus;    Latency;    Biomedical Engineering;   

Others  :  https://jscholarship.library.jhu.edu/bitstream/handle/1774.2/38130/CHEN-THESIS-2015.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: JOHNS HOPKINS DSpace Repository

【 摘 要 】

The response latency of neurons has been used to represent properties of acoustic stimuli. However, the latency also indicates the characteristic of neurons themselves. The role of the inferior colliculus (IC) is unclear, especially the external nucleus (ICX). Latency studies may provide a clue as to how neurons process stimuli. Single unit recordings of responses to tones in the central nucleus of the IC (ICC) and ICX were utilized. The dependence of latencies on the units tuning properties, tone frequencies, and attenuations were analyzed. In particular, we computed a weighted average latency across frequencies at a variety of sound levels and the first spike latency at neuron’s best frequency. Results showed that response latencies were shorter at higher sound levels in both the ICC and ICX. ICX neurons tend to have longer latencies than ICC neurons. Moreover, there was no discernable relationship between frequency selectivity and latency in ICX units.