Which behavior reflects impairment in executive function?

Choice A reason: Difficulty finding the right words is medically defined as anomia or expressive aphasia. This typically indicates a deficit in the language centers of the brain, specifically Broca area in the left frontal lobe. While it affects communication, it is categorized as a linguistic impairment rather than a primary deficit in the higher-order cognitive processing known as executive function. Choice B reason: Executive function refers to the cognitive processes managed by the prefrontal cortex, including planning, organizing, initiating, and monitoring complex goal-directed behaviors. An inability to plan or complete tasks, even if the physical motor skills are intact, directly reflects a breakdown in these executive processes. This impairment prevents the brain from sequencing the necessary steps required to reach a specific goal. Choice C reason: Getting lost in the hallway is an example of topographical disorientation or impaired visuospatial processing. This behavior is usually associated with dysfunction in the hippocampus or the parietal lobes, which manage spatial mapping and orientation. While it is a significant cognitive symptom often seen in dementia, it is distinct from the organizational and planning deficits defined as executive dysfunction. Choice D reason: Inappropriate social comments represent a failure in behavioral inhibition and social cognition. While frequently seen alongside executive dysfunction in conditions like frontotemporal dementia, social disinhibition is specifically a failure of the orbital-frontal cortex to regulate social conduct. It is often distinguished from the organizational "cold" executive functions like task planning and working memory.