Question:
Lucid interval may be seen in?
Lucid interval may be seen in?
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Besides extradural bleed, which listed mental state has a sane gap between two abnormal phases?
Updated On: Jun 24, 2026
- Intracerebral hemorrhage
- Alcohol intake
- Insanity
- Subdural hemorrhage
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The Correct Option is C
Solution and Explanation
Step 1: A lucid interval is a period of apparent normal consciousness or normal behaviour that lies between two episodes of abnormality. The term is used in two distinct settings in forensic medicine and psychiatry.
Step 2: In head injury, the classic lucid interval is seen in extradural (epidural) haemorrhage. The patient is briefly conscious after the impact, then deteriorates as the arterial bleed expands. In psychiatry, a lucid interval is a period of sanity between two phases of insanity.
Step 3: Among the given options, the only valid answer is insanity. During this lucid interval a person can make a valid will, give valid evidence, and is held legally responsible for civil and criminal acts.
Step 4: The distractors do not apply. Intracerebral and subdural haemorrhage typically cause progressive symptoms without the classic lucid interval seen in extradural bleeds, and simple alcohol intake does not produce a true lucid interval. Hence option (c) Insanity is correct.
Step 2: In head injury, the classic lucid interval is seen in extradural (epidural) haemorrhage. The patient is briefly conscious after the impact, then deteriorates as the arterial bleed expands. In psychiatry, a lucid interval is a period of sanity between two phases of insanity.
Step 3: Among the given options, the only valid answer is insanity. During this lucid interval a person can make a valid will, give valid evidence, and is held legally responsible for civil and criminal acts.
Step 4: The distractors do not apply. Intracerebral and subdural haemorrhage typically cause progressive symptoms without the classic lucid interval seen in extradural bleeds, and simple alcohol intake does not produce a true lucid interval. Hence option (c) Insanity is correct.
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