Final answer:
The salient network is most active when focused attention on external stimuli is required. When it is not functioning properly, individuals may have difficulty paying attention and recognizing visual images.
Step-by-step explanation:
The salient network, also known as the ventral attention network, is most active when an individual is engaged in tasks that require focusing attention on external stimuli, such as when recognizing and interpreting visual images. It helps in detecting and responding to salient or important information in the environment.
When the salient network is not functioning properly, individuals may have difficulty in paying attention to relevant stimuli and may be easily distracted. They may also struggle with visual perception tasks and have difficulty in recognizing and interpreting visual images.
It is important to note that the salient network is just one of the many networks in the brain that contribute to our ability to perceive and respond to the world around us.