The insula is a brain region involved in various cognitive, affective, and regulatory functions, including interoception, emotional responses, and empathy. Recent research suggests that the anterior insula plays a critical role in high-level cognitive control and attentional processes, acting as an integral hub in mediating interactions between large-scale brain networks involved in external attention and internal cognition. The insula is sensitive to salient events and marks them for further processing, initiating appropriate control signals. The anterior insula and anterior cingulate cortex form a "salience network" that segregates relevant stimuli to guide behavior. The network model proposes that the insula's core function is to detect salient events, switch between networks to access attention and working memory resources, modulate autonomic reactivity, and strongly couple with the anterior cingulate cortex to facilitate motor system access. This framework provides a parsimonious account of insula function in neurotypical adults and may offer insights into disorders of affective and social cognition. The insula's structural and functional connectivity is complex, with the anterior and posterior insula having distinct roles in physiological reactivity and salience detection. The salience network is crucial for dynamic switching between cognitive networks, enabling attentional control and behavioral responses. Dysfunction in the insula may lead to deficits in cognitive control, attention, and emotional processing, as seen in disorders like autism, anxiety, and schizophrenia. The model highlights the insula's role in integrating internal and external stimuli, modulating autonomic responses, and facilitating attentional and motor processes. Understanding the insula's network functions is essential for elucidating its role in normal and pathological conditions.The insula is a brain region involved in various cognitive, affective, and regulatory functions, including interoception, emotional responses, and empathy. Recent research suggests that the anterior insula plays a critical role in high-level cognitive control and attentional processes, acting as an integral hub in mediating interactions between large-scale brain networks involved in external attention and internal cognition. The insula is sensitive to salient events and marks them for further processing, initiating appropriate control signals. The anterior insula and anterior cingulate cortex form a "salience network" that segregates relevant stimuli to guide behavior. The network model proposes that the insula's core function is to detect salient events, switch between networks to access attention and working memory resources, modulate autonomic reactivity, and strongly couple with the anterior cingulate cortex to facilitate motor system access. This framework provides a parsimonious account of insula function in neurotypical adults and may offer insights into disorders of affective and social cognition. The insula's structural and functional connectivity is complex, with the anterior and posterior insula having distinct roles in physiological reactivity and salience detection. The salience network is crucial for dynamic switching between cognitive networks, enabling attentional control and behavioral responses. Dysfunction in the insula may lead to deficits in cognitive control, attention, and emotional processing, as seen in disorders like autism, anxiety, and schizophrenia. The model highlights the insula's role in integrating internal and external stimuli, modulating autonomic responses, and facilitating attentional and motor processes. Understanding the insula's network functions is essential for elucidating its role in normal and pathological conditions.