Biology › Section N · Nervous and sensory systems › Topic N.3
The central nervous system
The brain and spinal cord form the body's command centre — a folded cortex, a relay of deep structures, and a two-way cord, all wrapped in three membranes and floating in fluid.
In this topic
- The CNS and its wrappings
- The cerebral cortex
- The four lobes
- Basal ganglia and thalamus
- Hypothalamus and limbic system
- Cerebellum and brainstem
- The spinal cord
- Reflexes: the cord's fast lane
- Worked example: reasoning through a split-brain test
- Worked example: localising three lesions
- Common mistakes to avoid
- Key takeaways
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