Information flow in the rat thalamo-cortical system: spontaneous vs. stimulus-evoked activities
| Autor: | Hirokazu Takahashi, Tomoyo Isoguchi Shiramatsu, Kotaro Ishizu, Naotsugu Tsuchiya, Masafumi Oizumi, Rie Hitsuyu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Auditory Pathways Entropy Science Thalamus Population Biology Stimulus (physiology) Auditory cortex Article Cortex (anatomy) medicine Auditory system Animals Sensory cortex education Auditory Cortex Neurons education.field_of_study Multidisciplinary Geniculate Bodies Medial geniculate body Rats medicine.anatomical_structure Acoustic Stimulation Computational neuroscience Evoked Potentials Auditory Medicine Sensory processing Neuroscience Microelectrodes |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | The interaction between the thalamus and sensory cortex plays critical roles in sensory processing. Previous studies have revealed pathway-specific synaptic properties of thalamo-cortical connections. However, few studies to date have investigated how each pathway routes moment-to-moment information. Here, we simultaneously recorded neural activity in the auditory thalamus (or ventral division of the medial geniculate body; MGv) and primary auditory cortex (A1) with a laminar resolution in anesthetized rats. Transfer entropy (TE) was used as an information theoretic measure to operationalize “information flow”. Our analyses confirmed that communication between the thalamus and cortex was strengthened during presentation of auditory stimuli. In the resting state, thalamo-cortical communications almost disappeared, whereas intracortical communications were strengthened. The predominant source of information was the MGv at the onset of stimulus presentation and layer 5 during spontaneous activity. In turn, MGv was the major recipient of information from layer 6. TE suggested that a small but significant population of MGv-to-A1 pairs was “information-bearing,” whereas A1-to-MGv pairs typically exhibiting small effects played modulatory roles. These results highlight the capability of TE analyses to unlock novel avenues for bridging the gap between well-established anatomical knowledge of canonical microcircuits and physiological correlates via the concept of dynamic information flow. |
| Databáze: | OpenAIRE |
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