Which brain region is associated with sustaining attention?

• A. Orbital frontal cortex
• B. Angular gyrus
• C. Arcuate fasciculus
• D. BA 39, processing written language

Answer: (A)

Sustained attention depends on frontal control networks that keep goal-directed focus and monitor performance. Among the options, the orbital frontal cortex is the prefrontal region most associated with maintaining task engagement through evaluating rewards and guiding ongoing behavior, which supports staying on task. The angular gyrus and BA 39 are mainly linked to language, reading, and higher-level linguistic processing, not the maintenance of attention. The arcuate fasciculus is a white matter pathway connecting language areas, not a region tied to attention control. So, the orbital frontal cortex best fits the role of supporting sustained attention within these choices.