Related Experiment Video
Updated: Aug 29, 2025
09:28
Author Spotlight: An Accurate and Quantitative Approach to Study Visual Feature Selectivity of the Optokinetic Reflex in Mice
Published on: June 23, 2023
3.0K
Diversity in spatial frequency, temporal frequency, and speed tuning across mouse visual cortical areas and layers
Helen Wang1,2,3, Oyshi Dey1, Willian N Lagos1
1Systems Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, California, USA.
The Journal of Comparative Neurology
|September 7, 2022
Summary
Deep-layer neurons in the mouse visual cortex show specialized tuning for spatial and temporal frequencies, with distinct differences between visual areas like anterolateral (AL) and primary visual cortex (V1). Extratelencephalic neurons are more direction selective.
Area of Science:
- Neuroscience
- Visual System Research
- Cortical Circuitry
Background:
- The mouse visual system comprises specialized cortical areas (V1, AL, PM) with distinct feature/task processing.
- Previous studies on visual cortical area tuning preferences (spatial/temporal frequency) focused on superficial layers, limiting understanding of deeper layers.
- Deep-layer neurons possess unique connectivity, making their tuning properties crucial for comprehending visual information processing.
Purpose of the Study:
- To investigate and compare the tuning properties of two distinct layer 5 cell classes in V1, AL, and PM.
- To characterize spatial and temporal frequency tuning in deep-layer neurons across different visual cortical areas.
- To determine if extratelencephalically and intratelencephalically projecting layer 5 neurons differ in direction selectivity.
Main Methods:
- Utilized extracellular electrophysiology and two-photon calcium imaging.
- Targeted two distinct layer 5 cell classes within V1, AL, and PM.
- Analyzed tuning preferences for spatial frequency (SF) and temporal frequency (TF), and direction selectivity.
Main Results:
- Deep-layer neurons exhibit specialization for SF and TF, mirroring superficial layers.
- The strongest tuning differences were observed between AL and V1, and AL and PM, but not V1 and PM.
- Deep-layer neuron populations showed a broader range of preferred SFs and TFs than previously reported.
- Extratelencephalically projecting layer 5 neurons demonstrated higher direction selectivity compared to intratelencephalically projecting neurons.
Conclusions:
- Deep-layer neurons in the mouse visual cortex are specialized for visual features, with significant inter-areal differences, particularly involving AL.
- Layer 5 cell classes project differently and exhibit distinct response properties, contributing to specialized visual processing.
- Findings advance the understanding of cortical circuitry and visual information flow in higher visual areas.
Related Concept Videos
01:14Motor and Sensory Areas of the Cortex
4.5K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
4.5K
01:15Depth Perception and Spatial Vision
849
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
849
01:24Vision
55.1K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
55.1K