2.1 The Organism as a Machine
2.2 How the Nervous System is Studied
2.3 The Architecture of the Nervous System
2.4 The Cortex
2.5 Do We Really Have Two Brains?
2.6 Brain Functions and Neural Hierarchies
2.7 Building Blocks of the Nervous System: Neurons and Nerve Impulses
2.8 Interaction among Nerve Cells
2.9 Interaction through the Bloodstream
2.10 Recovery from Brain Injury