Does experience provide a permissive or instructive influence on the development of direction selectivity in visual...

Area of Science:

• Neuroscience
• Computational Neuroscience
• Visual System Development

Background:

• Sensory receptive field development in the cortex can be experience-dependent or experience-independent.
• Understanding the interplay between innate mechanisms and sensory experience is crucial for deciphering neural circuit development.

Purpose of the Study:

• To investigate the role of experience in the development of direction selectivity in the carnivore visual cortex.
• To determine the extent to which individual animal experience influences the parameters of emergent direction tuning.

Main Methods:

• Review of recent experimental findings on visual cortex development.
• Analysis of studies examining the influence of early visual experience and optogenetic stimulation on neuronal properties.

Main Results:

• Direction selectivity in carnivore visual cortex requires experience, but its parameters are largely predetermined.
• Initial biases in the naive cortex predict direction angle preference.
• Speed tuning properties are innate and not significantly altered by experience.
• Rapid emergence of direction selectivity via optogenetic activation suggests pre-existing information in the cortical circuit.

Conclusions:

• Experience plays a permissive role in the development of direction selectivity.
• The development of direction selectivity is primarily guided by evolutionarily acquired, experience-independent mechanisms.
• Cortical circuits possess innate biases that shape the emergence of sensory processing capabilities.