Phil tells Sam why his weight is fairly stable, what happens in his brain when he gets hungry and what changes when he has eaten. We talk about the adipostat, leptin, ghrelin and obesity, why we choose particular foods and how dopamine, opioids and (probably) serotonin are involved.

2. Neurobiology of appetite regulation

['A series of human embryology and anatomy podcasts linked to the teaching at the Swansea University College of Medicine, but hopefully helpful to all students with an interest in how we are made.', 'Phil teaches Sam about neuroscience, from action potentials to tracts, parts of the brain and so on. The series is intended to be useful to all medical students and maybe to students in other, related disciplines.']

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Reflex arcs, lower motor neurones, upper motor neurones, the cerebellum, basal ganglia, the frontal cortex and even decussations get a mention.

7. Neurological basis of movement

We cover the neuroanatomy, and a little neuroscience, of how pain is perceived by the brain and how analgesics and the brain itself can modify this.

6. Pain pathways

Phil talks about the neuroscience of addiction and withdrawal.

5. Addiction

Phil and Sam talk about the anatomy of the autonomic nervous system, the neurotransmitters involved and pharmacological targets.

4. Autonomic nervous system

Phil tries to teach Sam about neurotransmitters and how they work. We work through a list of the main neurotransmitters and give an overview of their functions.

2. Neurobiology of appetite regulation

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