2013
DOI: 10.1016/j.jhsa.2013.05.006
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The Middle Finger Flexion Test to Locate the Thenar Motor Branch of the Median Nerve

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Cited by 10 publications
(13 citation statements)
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“…Despite the high prevalence of variations of the median nerve in the carpal tunnel reported in the literature, few major anatomical textbooks make reference to such variations [ 2 ]. Of particular surgical importance, is the highly variable course of the TMB, that when damaged, can leave patients with functional deficits of the thumb including thenar weakness and loss of opposition [ 38 ]. Our meta-analysis found that the most common course of the TMB was extraligamentous with a pooled prevalence of 75.2%.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Despite the high prevalence of variations of the median nerve in the carpal tunnel reported in the literature, few major anatomical textbooks make reference to such variations [ 2 ]. Of particular surgical importance, is the highly variable course of the TMB, that when damaged, can leave patients with functional deficits of the thumb including thenar weakness and loss of opposition [ 38 ]. Our meta-analysis found that the most common course of the TMB was extraligamentous with a pooled prevalence of 75.2%.…”
Section: Discussionmentioning
confidence: 99%
“…There are few, if any, clinical or electrophysiological signs that anatomical variations of the median nerve in the carpal tunnel are present in a patient [ 41 ]. While physical examination using the middle finger flexion test may be accurate for predicting the location of the median nerve in the presence of an extraligamentous course, it is not able to accurately do so in the case of a transligamentous course, and thus provides no way of determining what course variant of TMB a patient may have [ 38 ]. We found the pooled prevalence of the transligamentous course of the TMB to be 11.3%.…”
Section: Discussionmentioning
confidence: 99%
“…Therefore, more precise and safer location should be explored. The anatomy of MBMN has been extensively described in the literature [12][13][14][15][16] ; however, to the best of our knowledge, few studies stated the location of the arborization of the terminal MBMN. Our dissection showed that the distal course of the MBMN and its terminal branches were all located in the proximal third of the thenar muscles, where the thenar portal was introduced.…”
Section: Discussionmentioning
confidence: 99%
“…The ulnar margin should not cross the intersection between the Kaplan cardinal line and a line drawn from the radial border of the middle finger, which is a landmark of the thenar motor branch of the median nerve. 3 Another easier method to estimate the location of the thenar motor branch of the median nerve is using the middle finger flexion test, proximal to the tip of the middle finger (MCP and PIP joints at 90 °of flexion) 4 ( Figure 1 ). The distal margin of the flap was proximal to a line drawn along the ulnar border of the thumb.…”
Section: Surgical Techniquesmentioning
confidence: 99%