Bilateral Congenital Absence of the Opponens Pollicis Muscle: A Case Report

Taş, Süleyman; Top, Hüsamettin

doi:10.1007/s11552-013-9577-7

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…The most significant factor contributor to the hand’s function is opposition [ 6 , 7 ]. Opposition movement plays a key role in hand motions such as pulp pinch, grip, and grasp [ 2 , 8 – 10 ]. Thumb opposition movement includes two elements, namely, pronation and palmar abduction [ 1 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope

et al. 2018

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BackgroundThumb opposition is vital for hand function and involves pronation and palmar abduction. The improvement of pronation is often used as one of the evaluation items of the opponensplasty method for severe carpal tunnel syndrome. However, most of the studies used substitution evaluation methods for measurement of the pronation angle. Thus, there is still no appropriate method for measuring thumb pronation angle accurately in carpal tunnel syndrome patients.In recent reports, a wearable gyroscope was used to evaluate upper extremity motions and it can be possibly used for accurate measurement of the thumb pronation angle along the three-dimensionally moving bone axis.Thus, we investigated the reliability of measuring thumb pronation using a gyroscope and evaluated whether this method can be used to detect opposition impairment.MethodsThe participants were volunteers with unaffected upper limbs (32 hands) and patients with carpal tunnel syndrome (27 hands). The pronation and palmar abduction angles during opposition movements were measured using a three-axis gyroscope that included a three-axis accelerometer. The gyroscope was fixed onto the first metacarpal bone and the thumb phalanx.ResultsThe pronation and palmar abduction angles of the metacarpal bone and the palmar abduction angles of the phalanx significantly decreased in the carpal tunnel syndrome group. The pronation angle of the metacarpal bone during opposition movement peaked later than the palmar abduction angle in all hands.ConclusionsWe were able to measure the thumb pronation and palmar abduction angles using the three-axis gyroscope, and this tool was able to detect impairments of thumb opposition due to carpal tunnel syndrome. This could be a tool for measuring thumb and finger angles and for detecting impairments caused by various diseases.

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Section: Introductionmentioning

confidence: 99%

A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope

et al. 2018

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“…CTH being rare, can be mistaken for thenar atrophy resulting from severe median nerve entrapment at the carpal tunnel; this may lead to unnecessary surgical intervention ( Sonel et al, 2002 , Parsa et al, 2018 , Taş and Top, 2015 ). On the other hand, patients with CTH may develop carpal tunnel syndrome (CTS) later in life from various causes and it is important to identify and initiate appropriate treatment in those patients.…”

Section: Discussionmentioning

confidence: 99%

Ultrasonography in patients with congenital thenar hypoplasia (Cavanagh syndrome) and co-morbid carpal tunnel syndrome

Iyer¹

2021

Clinical Neurophysiology Practice

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Highlights Distinguishing congenital thenar hypoplasia (CTH) from severe carpal tunnel syndrome (CTS) is challenging. Electrodiagnostic studies may be non-localizing in severe median nerve entrapment. Ultrasound can reliably diagnose co-morbid CTS in CTH. Ultrasound provides insight into the pattern of thenar muscle hypoplasia.

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“…Three of these articles did not report detailed findings. Two reported only that the median nerve was intact [11,12], and 1 reported only that stimulation of the median nerve did not cause thumb movement.…”

Section: Literature Reviewmentioning

confidence: 99%

Diagnosing Carpal Tunnel Syndrome in Cavanagh Syndrome: A Literature Review and Proposed Electro Physiologic Protocol

Kumbhare¹,

Mian²,

Singh³

et al. 2017

Pain Manage Med

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Objective: To summarize the literature on the electrophysiology of Cavanagh Syndrome (CS), to present a clinical application and to propose an updated electrophysiologic protocol. Methods:A systematic literature search for CS was carried out and a clinical application is presented.Results: CS is characterized by congenital thenar hypoplasia and can be associated with other regional muscular and vascular anomalies. The main electrophysiologic abnormality in patients with CS is a reduced amplitude median compound muscle action potential (CMAP) to the thenar eminence, which is also seen in CTS. Radiographic, and electrodiagnostic findings of a patient with co-morbid CS and CTS is presented. Evaluating the median CMAP to the first lumbrical may assist with the diagnosis of CTS in patients with CS. Conclusions:As CTS and CS can present with thenar atrophy and low amplitude CMAPs, electromyographers should be aware of the clinical and radiographic characteristics of CS and consider electrophysiologic evaluation of the first lumbrical.

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Bilateral Congenital Absence of the Opponens Pollicis Muscle: A Case Report

Cited by 3 publications

References 12 publications

A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope

A new method of measuring the thumb pronation and palmar abduction angles during opposition movement using a three-axis gyroscope

Ultrasonography in patients with congenital thenar hypoplasia (Cavanagh syndrome) and co-morbid carpal tunnel syndrome

Diagnosing Carpal Tunnel Syndrome in Cavanagh Syndrome: A Literature Review and Proposed Electro Physiologic Protocol

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