Psych CASC / OSCE · Foundations — neuroimaging in psychiatry
Explain neuroimaging purpose and limits to parents after first-episode psychosis — CASC communication station
MRCPsych/FRANZCP-style CASC: plain-language neuroimaging counselling in early psychosis.
On this page & tools
Target exams
Station brief
Format. Communication station, approximately 7–10 minutes after reading. You are the psychiatry registrar in an early-psychosis service. [1]
Candidate instructions. Build rapport. Explain why we sometimes use structural MRI (to look for medical problems), what it cannot do (prove or disprove a primary psychiatric diagnosis), and why research fMRI/PET colour maps are not personal diagnostic tests. Address the "chemical imbalance photo" myth using accurate but simple dopamine-pathway language. Invite questions; safety-net for new neurological symptoms. [1][2][3][4]
Candidate scenario
Parents are internet-informed and anxious. Expected prompts: "We want an fMRI today," "Does normal MRI mean it is not biological?," "Can you measure dopamine in blood or with PET now?," "Will the brain stay damaged forever?" Respond with honesty, hope, and clear limits. [2][3]
Marking domains
- Empathy and collaborative stance
- Correct clinical vs research imaging distinction [2][3]
- Organic red-flag explanation without unnecessary alarm [1]
- Accurate limits of BOLD/fMRI and PET occupancy [3][4]
- Normal MRI does not mean "not real" [2]
- Incidental findings mentioned at appropriate depth
- Recovery framing and next steps
- No invented legal section numbers
Reveal assessor key
Open. Check understanding and fears. [1]
Core. Diagnosis is by history and mental state. MRI (when used) looks for medical problems we must not miss. Research scans show group patterns and blood-flow related signals — they do not print a personal diagnosis. [2][3]
Biology without cartoons. Brain systems that assign importance and organise thinking can be disrupted; evidence supports dopamine signalling changes in key pathways in many people with schizophrenia-spectrum illness — one part of a broader story. Medicines can help those pathways; psychosocial care is essential. [4]
Normal MRI. Does not mean imaginary illness or absence of biology. [2]
Close. Summarise; when to re-seek care (seizure, severe headache, weakness, confusion); outline early-intervention package. [1]
References
- [1]Freudenreich O, Schulz SC, Goff DC Initial medical work-up of first-episode psychosis: a conceptual review Early Interv Psychiatry, 2009.PMID 21352170
- [2]First MB, Drevets WC, Carter C, et al. Clinical Applications of Neuroimaging in Psychiatric Disorders Am J Psychiatry, 2018.PMID 30173550
- [3]Logothetis NK What we can do and what we cannot do with fMRI Nature, 2008.PMID 18548064
- [4]Howes OD, Kapur S The dopamine hypothesis of schizophrenia: version III--the final common pathway Schizophr Bull, 2009.PMID 19325164