Summary
This chapter covers the structural and functional aspects of the nervous system from the cellular level of neurons and glial cells to complex interactions within the central and peripheral nervous systems. Key processes such as the generation and propagation of action potentials, synaptic transmission, and the roles of neurotransmitters are explained in detail. The discussion extends to the protective mechanisms of the brain such as the meninges, cerebrospinal fluid, and blood-brain barrier, and highlights the impact of head injuries like concussions on long-term brain function. Techniques for studying brain function provide insight into how neural circuits underlie human behavior, emotion, and memory.