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Imaging the Dynamics of Mammalian Neocortical Population Activity In-Vivo
Amiram Grinvald1, David Omer, Shmuel Naaman
1Department of Neurobiology, Weizmann Institute of Science, 26, Rehovot, 76100, Israel, Amiram.grinvald@weizmann.ac.il.
Advances in Experimental Medicine and Biology
|August 5, 2015
Summary
Voltage-sensitive dye imaging (VSDI) reveals neural population dynamics across local and large brain areas with high spatial and temporal resolution. This technique visualizes subthreshold synaptic potentials, aiding studies in sensory perception and motor control.
Area of Science:
- Neuroscience
- Systems Neuroscience
Background:
- Neural computations involve neuronal populations across various scales.
- Limited techniques exist for exploring local and large-range neural population dynamics.
Purpose of the Study:
- To review the application and findings of in-vivo Voltage-Sensitive Dye Imaging (VSDI).
- To highlight VSDI's utility in studying neural population activity, particularly in the visual system.
Main Methods:
- Voltage-Sensitive Dye Imaging (VSDI) provides sub-millisecond temporal and ~50 μm spatial resolution.
- VSDI visualizes neural population activity across areas from tens of microns to ~10 cm apart.
- The technique emphasizes subthreshold synaptic potentials.
Main Results:
- VSDI has been applied across various species (mouse, rat, cat, monkey) and cortical areas.
- It has been used to study sensory activation patterns (visual, auditory, somatosensory, olfactory), motor preparation, and spontaneous activity.
- Results primarily focus on the visual system, exploring retinotopic activation and dynamic spatiotemporal patterns.
Conclusions:
- VSDI is a powerful tool for investigating neural population dynamics in-vivo.
- It offers unique insights into the spatiotemporal patterns of neural activity underlying perception, cognition, and motor control.
