Summary
This study compared how isoflurane and ketamine/xylazine anesthesia differentially affect spontaneous and visually evoked electrophysiological activity in mouse primary visual cortex, finding distinct impacts on neural oscillations and sensory processing. For lighting researchers using animal models, these findings highlight that choice of anesthetic significantly confounds visual cortex responses, which has implications for interpreting light-stimulation studies conducted under anesthesia.
Key Findings
- Isoflurane enhanced spontaneous ensemble rhythmicity at 10–40 Hz and increased coherence between layer IV and superficial/deep layers, while diminishing visually evoked responses across layers.
- Ketamine preferentially increased local field potential power at 2–4 Hz with largest coherence increases between superficial and deep layers, and enhanced (rather than diminished) visually evoked responses.
- The two anesthetic paradigms produced qualitatively opposite effects on visual stimulus processing, underscoring the importance of anesthetic choice in electrophysiological visual research.
Categories
The Science of Light: Examines how anesthetics alter visual cortex electrophysiology, with direct relevance to understanding visual processing and evoked responses to light stimuli.
Author(s)
A Arena
Publication Year
2014
Related Publications
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice