Open AccessFunctional imaging of neuronal activity of auditory cortex by using Cal-520 in anesthetized and awake mice
Author(s) -
Jingcheng Li,
Jianxiong Zhang,
Meng Wang,
Junxia Pan,
Xiaowei Chen,
Xiang Liao
Publication year - 2017
Publication title -
biomedical optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.8.002599
Subject(s) - auditory cortex , neuroscience , in vivo , functional imaging , functional organization , premovement neuronal activity , cortex (anatomy) , wakefulness , electrophysiology , medicine , psychology , biology , electroencephalography , microbiology and biotechnology
The organization in the primary auditory cortex (Au1) is critical to the basic function of auditory information processing and integration. However, recent mapping experiments using in vivo two-photon imaging with different Ca 2+ indicators have reached controversial conclusions on this topic, possibly because of the different sensitivities and properties of the indicators used. Therefore, it is essential to identify a reliable Ca 2+ indicator for use in in vivo functional imaging of the Au1, to understand its functional organization. Here, we demonstrate that a previously reported indicator, Cal-520, performs well in both anesthetized and awake conditions. Cal-520 shows a sufficient sensitivity for the detection of single action potentials, and a high signal-to-noise ratio. Cal-520 reliably reported on both spontaneous and sound-evoked neuronal activity in anesthetized and awake mice. After testing with pure tones at a range of frequencies, we confirmed the local heterogeneity of the functional organization of the mouse Au1. Therefore, Cal-520 is a reliable and useful Ca 2+ indicator for in vivo functional imaging of the Au1.