However , studies in zebrafish have revealed that these growth cones followed a pretract morphologically different from its surroundings and extending out in front of regular pioneer neurons .
Retinal growth cones were thought to be related to follower neurons .
Studies in zebrafish have revealed that these growth cones followed a pretract morphologically different from its surroundings and extending out in front of regular pioneer neurons .
Retinal growth cones were thought to be related to follower neurons .