This chapter explores how memory is encoded, stored, and retrieved within the brain - not as a static archive, but as a dynamic and evolving biological process.

Memory begins with encoding, where experience is transformed into neural activity. This is followed by consolidation, during which fragile traces are stabilised through synaptic and systems-level changes. Retrieval then reactivates these traces, bringing them back into conscious awareness - but each act of recall subtly reshapes the memory itself.

At a neurobiological level, memory depends on distributed networks. The hippocampus plays a central role in forming new episodic memories, while cortical regions store long-term representations. Emotional memory involves structures such as the amygdala, which modulate the strength and salience of encoding.

A key theme is plasticity. Long-term potentiation and related mechanisms allow synapses to strengthen with repeated activation, forming the cellular basis of learning and memory. Yet this plasticity also means that memory is inherently malleable - vulnerable to distortion, reconsolidation, and forgetting.

Clinically, this has profound implications. Disorders of memory range from amnesia to intrusive recollections, as seen in trauma-related conditions. Memory is not simply lost or preserved - it can be fragmented, amplified, or reshaped.

This chapter reframes memory as an active process - one that continuously integrates past experience with present context.

Key Takeaways

* Memory involves encoding, consolidation, and retrieval.

* The hippocampus is central to forming new episodic memories.

* Long-term memory is stored across distributed cortical networks.

* Synaptic plasticity underpins learning and memory formation.

* Emotional arousal influences memory strength and salience.

* Memory is reconstructive and can be altered with each retrieval.

* Clinical disorders of memory reflect disruptions in these processes.

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