The average M1-M2 angle was 38° with functional opening of the first commissure. |
The lateral part of the anterior commissure traverses the inferior part of the brain. |
The corpus callosum is not formed till after the anterior commissure and fornix. |
The column of the fornix has been divided a short distance above the anterior commissure. |
These commissures are the anterior commissure, the fornix, and the corpus callosum, the two latter being peculiar to Mammalia. |
The latter intersects various projection and commissural fibers, including those crossing to the opposite hemisphere in the anterior commissure. |