- Essay 48: Optic Tectum Decision-Making
- Essay 47: Striatum as Mosaic of Broken Mirrors
- Essay 46: Ventral Pallidum for Seek, Timeout, and Avoid
- Essay 45: Subcortical Basal Ganglia Consensus Loops
- Essay 44: Breadcrumb Self-Trail Avoidance
- Essay 43: Filter Feeding, Roaming, and Opioids
- Essay 42: Optic Tectum and Striatum Decision
- Essay 41: Thigmotaxis
- Essay 40: Lateral Line Obstacle Avoidance
- Essay 39: Hindbrain
- Essay 38: Food Zone
- Essay 37: Odor Neighborhoods
- Essay 36: Parabrachial Nucleus as Tunicate Adult Brain
- Essay 35: Avoidance Sequences
- Essay 34: Looming and Dimming
- 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
