Temporal Sensitivity Under Photopic and Scotopic Conditions Across the Cortical Visual Hierarchy.

ABSTRACT:

Purpose

Behavioral and electrophysiological studies have shown that vision is slower under scotopic conditions (dark, activating only rods) than photopic conditions (light, activating only cones). However, slower scotopic processing cannot be solely explained by findings that rod signals are slower than cone signals, and it is unknown whether temporal processing differences persist in cortex. Flickering stimuli have previously been used in functional MRI (fMRI) studies to probe photopic cortical temporal sensitivity. This fMRI study investigates flicker sensitivity under photopic and scotopic conditions across the cortical visual hierarchy.

Methods

Fourteen participants viewed a stimulus flickering at six frequencies (2-10 Hz) under photopic and scotopic conditions during fM

SUBMITTER: Elul D 

PROVIDER: S-EPMC12416517 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature