- Essay 33: Klinotaxis
- Essay 32: Indirect Seek, Tunicate and Basal Ganglia
- Essay 31: Odor Seek with Striatum Timeout
- Essay 30: Real Time Place Avoidance
- Essay 29: Sleep [part 2] [part 3] [part 4]
- Essay 28: Lateral Line
- Essay 27: Feeding State Transitions [Model] [Issues]
- Essay 26: Olfactory Attention [Issues]
- Essay 25: phototaxis and head direction
- Essay 24: Phototaxis: Apical Locomotion [Issues]
- Essay 23: Feeding and the Peptide Core
- Essay 22: Subthalamic Nucleus for Explore [Issues]
- Essay 21: Action Syllables and Levy Walks
- Essay 20: Olfactory Avoidance
- Essay 19: Nucleus Isthmi
- Essay 18: Proto-Striatum
- Essay 17: Proto-Vertebrate Locomotion
- Essay 16: Learning to Ignore
- Essay 15: Fruit Fly Mushroom Body
- Essay 14: Obstacles and Food
- Essay 13: Zooplankton
