A frog's eye view: Foundational revelations and future promises

Area of Science:

• Neuroscience
• Vision Science
• Amphibian Biology

Background:

• Frogs and toads were historically significant models in visual neuroscience from the mid-19th century to the 1980s.
• Despite their complex visual systems, anurans have been largely overlooked in recent decades.
• Anurans possess highly developed vision, a standard vertebrate retinal plan, accessible brains, and useful behavioral repertoires.

Purpose of the Study:

• To advocate for the renewed use of anurans as research models in visual neuroscience.
• To highlight the potential for gaining novel insights by applying contemporary methods to classical questions in anuran vision.
• To identify key areas for future research, including molecular evolution of visual pigments and the relationship between retinal signals, brain processing, and behavioral decisions.

Main Methods:

• Review of historical research and current potential of anuran models.
• Conceptual framework for applying state-of-the-art techniques to anuran visual systems.
• Focus on molecular evolution of visual pigments and photoreceptors.
• Analysis of the link between retinal signals, neural processing, and behavioral output.

Main Results:

• Anurans offer a rich diversity of species and life histories within a constrained evolutionary and physiological context.
• Their visual systems present opportunities for studying fundamental questions in neuroscience.
• Potential exists for significant discoveries at both the input (molecular evolution) and output (behavioral decision-making) of the visual system.

Conclusions:

• Revisiting anuran models with modern techniques can yield significant advancements in visual neuroscience.
• Future research should focus on the molecular basis of vision and the neural mechanisms underlying visual behavior in anurans.
• Anurans represent a valuable, yet underutilized, resource for understanding visual processing and evolution.