Tests for Functional Assessment of Encephalopathy

Functional (psychometric and clinical) assessment of hepatic/metabolic encephalopathy relies on a battery of bedside neurological signs and neuropsychometric tests that grade the severity of cognitive and motor impairment. All three tests listed are standard components of this assessment.

Analysis of Each Test

• 1. Flapping tremors (Asterixis): A negative myoclonus elicited by asking the patient to hold the arms outstretched with wrists dorsiflexed. It is a classic bedside sign used to grade the severity of metabolic (especially hepatic) encephalopathy and is a core part of functional/clinical staging.
• 2. Number Connection Test (NCT): A paper-and-pencil psychometric test in which the patient connects numbered circles in sequence. It assesses attention, psychomotor speed, and visuo-spatial working memory, and is one of the most widely used tools to detect and grade both overt and minimal/covert hepatic encephalopathy.
• 3. Constructional apraxia: Assessed by asking the patient to copy simple figures (e.g., a star or interlocking shapes). Difficulty in construction reflects impaired visuo-spatial and fine motor coordination and is a recognized component of the psychometric hepatic encephalopathy score (PHES) battery used for functional grading of encephalopathy.

Conclusion

Since flapping tremors, the Number Connection Test, and constructional apraxia are all established, complementary tools used together for the functional (clinical plus psychometric) assessment and grading of encephalopathy, all three tests (1, 2 and 3) are correct.

The correct answer is 1, 2 and 3.

Why the Other Options Are Wrong

• 2 and 3 only: Incorrectly excludes flapping tremors (asterixis), which is a standard and widely used sign for grading encephalopathy severity.
• 1 and 3 only: Incorrectly excludes the Number Connection Test, a key psychometric tool for detecting even minimal/subclinical encephalopathy.
• 1 and 2 only: Incorrectly excludes constructional apraxia, which is a recognized element of the psychometric assessment battery (e.g., figure-copying tasks in PHES) and should not be omitted.