PREVIOUSLY ASKED IN:
PSC Miscellaneous Prelims 2018
Answer
MacNaughten test
Explanation
The M'Naghten rule (or MacNaughten test) is not a medical diagnostic test. It is a legal test applied in common law jurisdictions to determine whether a criminal defendant was legally insane at the time they committed a crime. On the other hand, a Colonoscopy (examining the large intestine), Doppler test (ultrasound for blood flow), and C.T. Scan (computed tomography for internal organs) are all actual medical diagnostic tests used by doctors.
Key Points
- > The M'Naghten test was established by the English House of Lords in 1843.
- > It is the foundational rule for the insanity defense in criminal law.
- > A Colonoscopy is an endoscopic examination of the large bowel and the distal part of the small bowel.
- > A Doppler ultrasound is a test that uses high-frequency sound waves to measure the amount of blood flow.
- > A CT scan combines a series of X-ray images taken from different angles around the body.
- > CT stands for Computed Tomography.
Additional Information
Common Medical Tests and Their Uses
| Test Name | Target Organ/Condition | Modality |
|---|---|---|
| Colonoscopy | Large Intestine (Colon) | Endoscopic Camera |
| Doppler Test | Blood vessels & circulation | Ultrasound waves |
| CT Scan | Brain, bones, internal organs | X-ray and Computer |
| MRI | Soft tissues, brain, ligaments | Magnetic Field & Radio waves |
Memory Tips
- Rule of Law: M'Naghten is a famous legal case regarding Daniel M'Naghten. Thus, it belongs to a courtroom, not a hospital diagnostic room.