Which association fiber connects the parietal, temporal, occipital and frontal lobes?

• A. Superior Longitudinal Fasciculus
• B. Arcuate Fasciculus
• C. Uncinate Fasciculus
• D. Corona Radiata

Answer: (A)

Long-range association fibers that interconnect different cortical regions within one hemisphere enable integration of information across lobes. The superior longitudinal fasciculus is the major dorsal association pathway that runs along the lateral white matter and links the frontal lobe with parietal, temporal, and extending toward occipital regions. This connectivity allows communication among these lobes for tasks like attention, language, and visuospatial processing, which is why it best fits connecting all four lobes.

The arcuate fasciculus, by contrast, primarily connects frontal and temporal language areas, not spanning the occipital or parietal lobes in the same broad way. The uncinate fasciculus links the frontal lobe with the anterior temporal lobe, not across all four lobes. The corona radiata consists of projection fibers to and from the cortex rather than a long intrahemispheric association tract connecting multiple lobes.