White Matter Tracts

Question 1

Hemispheric white matter tracts are divided by course, connections into what fibers?

Answer 1

Association, commisural, and projection fibers

Question 2

Short (arcuate or “U” fibers) link adjacent gyri, course parallel to long axis or sulci

Long fibers form fasciculi connecting widely spaced gyri

Answer 2

Association fibers

Question 3

Types of association fibers

Answer 3

1. Cingulum
2. Uncinate fasciculus
3. Superior longitudinal (arcuate) fasciculus
4. Inferior longitudinal fasciculus
5. Superior occipitofrontal fasciculus
6. Inferior occipitofrontal fasciculus

Question 4

Long, curved fasciculus deep to cingulate gyrus; interconnects parts of frontal/parietal/temporal lobes

Answer 4

Cingulum