Relationships and Patterns of Variation in the Strength of Finger and Wrist Flexor Muscle Groups and the Identification of Simulated Paralysis.

Dong Gao, Zeren Yang, Dong Tian, Qing Xia, Xinyao Li, Wentao Xia

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Article in Journal of musculoskeletal & neuronal interactions, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Dong Gao *Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai, China.

Zeren Yang *Chain Forensic Science of Zhejiang Province, Hangzhou, China.

Dong TianDepartment of Hand Surgery, Huashan Hospital, Fudan University, Shanghai, China.

Qing XiaShanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai, China.

Xinyao LiShanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai, China.

Wentao XiaShanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai, China.

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6 · The paper itself

Abstract

objectiveTo investigate the relationship between muscle strength in various flexor muscle groups of the fingers and wrist and establishes a method for identifying simulated paralysis using the MicroFET2 muscle strength tester.

methodsSubjects were divided into three groups: a young cooperative group (n = 60), an elder cooperative group (n = 17), and a simulated paralysis group (n = 25). The peak force of wrist palmar flexion, thumb palmar abduction, and distal finger flexion was measured in different positions using the MicroFET2.

resultsThe highest muscle strength was observed in wrist joint dorsal extension at 30°, followed by the neutral position at 0°, and then palmar flexion at 30°. For thumb palmar abduction, strength was higher at 30° than at 60°. Regarding overall flexion strength, wrist palmar flexion was the strongest, followed by the thumb, then the index finger, middle finger, ring finger, and finally, the little finger. In contrast, the simulated paralysis group exhibited irregular muscle strength patterns, providing a basis for identifying simulated muscle weakness.

conclusionThe use of MicroFET2 for measuring finger and wrist flexor muscle strength reveals consistent patterns, aiding in the detection of simulated muscle weakness. These findings enhance the objectivity and accuracy of muscle strength testing in forensic clinical practice.

Indexed as

FingersMuscle, SkeletalMuscle StrengthParalysisWristAdultAgedFemaleHumansMaleMiddle AgedYoung AdultClinical Forensic MedicineFinger Grip StrengthQuantitative Muscle Strength TestingSimulated IdentificationWrist Flexor Strength

Identifiers

PMID40452198

PMCPMC12131081

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