scholarly journals Distal pronator teres motor branch transfer for wrist extension restoration in radial nerve paralysis

2020 ◽  
pp. 1-7
Author(s):  
Jayme Augusto Bertelli ◽  
Sushil Nehete ◽  
Elisa Cristiana Winkelmann Duarte ◽  
Neehar Patel ◽  
Marcos Flávio Ghizoni
Keyword(s):  
Median Nerve ◽  
Radial Nerve ◽  
Full Range ◽  
Medial Epicondyle ◽  
Wrist Extension ◽  
Motor Branch ◽  
Nerve Paralysis ◽  
Pronator Teres ◽  
Flexion Extension ◽  
Anterior Side

OBJECTIVEThe authors describe the anatomy of the motor branches of the pronator teres (PT) as it relates to transferring the nerve of the extensor carpi radialis brevis (ECRB) to restore wrist extension in patients with radial nerve paralysis. They describe their anatomical cadaveric findings and report the results of their nerve transfer technique in several patients followed for at least 24 months postoperatively.METHODSThe authors dissected both upper limbs of 16 fresh cadavers. In 6 patients undergoing nerve surgery on the elbow, they dissected the branches of the median nerve and confirmed their identity by electrical stimulation. Of these 6 patients, 5 had had a radial nerve injury lasting 7–12 months, underwent transfer of the distal PT motor branch to the ECRB, and were followed for at least 24 months.RESULTSThe PT was innervated by two branches: a proximal branch, arising at a distance between 0 and 40 mm distal to the medial epicondyle, responsible for PT superficial head innervation, and a distal motor branch, emerging from the anterior side of the median nerve at a distance between 25 and 60 mm distal to the medial epicondyle. The distal motor branch of the PT traveled approximately 30 mm along the anterior side of the median nerve; just before the median nerve passed between the PT heads, it bifurcated to innervate the deep head and distal part of the superficial head of the PT. In 30% of the cadaver limbs, the proximal and distal PT branches converged into a single trunk distal to the medial epicondyle, while they converged into a single branch proximal to it in 70% of the limbs. The proximal and distal motor branches of the PT and the nerve to the ECRB had an average of 646, 599, and 457 myelinated fibers, respectively.All patients recovered full range of wrist flexion-extension, grade M4 strength on the British Medical Research Council scale. Grasp strength recovery achieved almost 50% of the strength of the contralateral side. All patients could maintain their wrist in extension while performing grasp measurements.CONCLUSIONSThe distal PT motor branch is suitable for reinnervation of the ECRB in radial nerve paralysis, for as long as 7–12 months postinjury.

scholarly journals Internal Trauma, Humeral Fracture, and Radial Nerve Paralysis: How Could it Occur in the Sport Setting? A Case Report and Review of the Literature

2020 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Elghoul Naoufal ◽  
Elantri Ismail ◽  
Bouya Ayoub ◽  
Bennis Azzelarab ◽  
Zaddoug Omar ◽  
...  
Keyword(s):  
Radial Nerve ◽  
Full Range ◽  
Humeral Fracture ◽  
Imaging Findings ◽  
Review Of The Literature ◽  
Significant Morbidity ◽  
Nerve Paralysis ◽  
Pathologic Fractures ◽  
Type Of Fracture

Thrower’s fractures are Spiral fractures of the humerus in the ball. They represent very uncommon clinical entities that can simulate pathologic fractures. Moreover, the concomitant neurologic deficient is rare. Herein we report a 27 years old muscular man presented a spiral fracture of the humerus following a forceful throw of the ball during an amateur throwing challenge. Clinical and imaging findings showed a displaced Thrower fracture with radial nerve neurapraxia (known as Holstein Lewis fracture) prompting the patient to undergo surgery. The intraoperative aspect found that the nerve was near to the beveled distal humeral fragment with no incarceration. We performed an internal fixation using the Leicester plate and the nerve was kept away from the plate by the interposition of a soft tissue sheet. At the last follow up, the fracture united and radial nerve neurapraxia resolved and the patient regained the full range of motion of his right upper limb with no pain. In conclusion, although this type of fracture is rare, given their significant morbidity, we emphasize that the reactional throwers should undergo appropriate preseason training before practicing a throwing challenge or generally a throwing sport.

Diagnostic Biopsy of the Pronator Teres and a Motor Branch of the Median Nerve: Indications and Technique

2012 ◽  
Vol 37 (12) ◽  
pp. 2570-2575 ◽  
Author(s):  
Christopher J. Dy ◽  
Dale J. Lange ◽  
Kristofer J. Jones ◽  
Rohit Garg ◽  
Edward F. DiCarlo ◽  
...  
Keyword(s):  
Median Nerve ◽  
Motor Branch ◽  
Pronator Teres ◽  
Diagnostic Biopsy

Functional restoration after early tendon transfer in high radial nerve paralysis

2010 ◽  
Vol 36 (2) ◽  
pp. 135-140 ◽  
Author(s):  
V. Dabas ◽  
T. Suri ◽  
P. K. Surapuraju ◽  
S. Sural ◽  
A. Dhal
Keyword(s):  
Radial Nerve ◽  
Tendon Transfer ◽  
Hand Function ◽  
Precision Grip ◽  
Functional Restoration ◽  
Nerve Paralysis ◽  
Power Grip ◽  
Pronator Teres ◽  
Junction Site ◽  
Extensor Carpi Radialis

We assessed the effect of an early transfer of pronator teres to extensor carpi radialis brevis on hand function in patients with high radial nerve paralysis. Power grip and precision grip were measured preoperatively and postoperatively using a dynamometer. Fifteen patients were operated on, of which ten could be assessed at the end of 6 months. At 6 months after surgery, there was a median increase of 48% in power grip, 162% in tip pinch, 90% in key pinch and 98% in palmar pinch. Decreased palmar flexion was seen in four patients. Fraying of the periosteal extension and rupture of sutures at the junction site were each seen in one patient, leading to unsatisfactory results. Early tendon transfer quickly restored efficient grip while awaiting reinnervation of wrist extensors, avoiding the need for prolonged external splintage.

scholarly journals Topographical, anatomical and neurosurgical aspects of "end-to-side" nerve repair

2021 ◽  
Vol 23 (1) ◽  
pp. 121-128
Author(s):  
A. Y. Nisht ◽  
Nikolay F. Fomin ◽  
Vladimir P. Orlov
Keyword(s):  
Median Nerve ◽  
Ulnar Nerve ◽  
Lateral Surface ◽  
Peripheral Nerves ◽  
Radial Nerve ◽  
Surgical Techniques ◽  
Nerve Fibers ◽  
Individual Variability ◽  
Motor Branch ◽  
Deep Branch

The article presents the results of a comprehensive anatomical and experimental study of individual variability in the structure and topography of motor branches of peripheral nerves in relation to the justification of methods for selective reinnervation of tissues by the "end-to-side" neurorrhaphy. It was found that relatively longer branches of peripheral nerves with a small number of connecting inter-arm collaterals characteristic of narrow and long limbs create conditions for less traumatic mobilization of motor branches. In cases with relatively wide and short extremities mobilization of peripheral nerves is complicated by the presence of a large number of collateral branches and intra-trunk connections, which are often damaged when separate bundles that make up the mobilized branches of the donor or recipient nerve are isolated from the main nerve trunk. It has been shown that potential recipient nerves should be motor branches of peripheral nerves, the preservation of which is of fundamental importance for the function of the corresponding segment of the limb. To create conditions conducive to selective reinnervation of functionally significant muscle groups of the upper limb, we have developed, justified from anatomical positions, and tested in an experiment on anatomical material methods for connecting the distal motor branches of peripheral nerves by the "end-to-side" neurorrhaphy. The main idea of accelerated recovery of the thumb opposition in injuries of the median nerve is to reinnervate the muscles of the elevation of the I finger due to nerve fibers that are part of the deep branch of the ulnar nerve. For this purpose, surgical techniques have been developed for connecting the recurrent motor branch of the damaged median nerve mobilized at the level of the wrist with the edges of a surgically formed perineurium defect on the lateral surface of the bundles that make up the deep branch of the ulnar nerve. In another clinical situation, in patients with radial nerve injuries, for the muscle reinnervation, а method is proposed for neurotisation of the deep motor branch of the radial nerve by the end-to-side suture to the lateral surface of the median nerve. We assume that performing the "end-to-side" nerve suture at the level of the base of the hand in the cases of proximal damage to the median nerve will reduce the time of reinnervation of the muscles of the thumb elevation by 400450 days. Transposition of the deep branch of the damaged at the proximal level radial nerve with "end-to-side" neurorrhaphy to the median nerve by 250300 days (based on the total length of the shoulder and forearm, which is about 50 cm and the rate of regeneration of nerve fibers 1 mm per day). Accordingly, with higher injuries (brachial plexus), the gain in the time of reinnervation of the distal segments will be even greater. In our opinion, the results can be used as a basis for further clinical research on the development of methods for selective tissue reinnervation in cases with isolated injuries of the peripheral nerves.

Median nerve branches to the pronator teres: cadaveric study with potential use in neurotization procedures to the radial nerve at the elbow

2011 ◽  
Vol 114 (1) ◽  
pp. 253-255 ◽  
Author(s):  
R. Shane Tubbs ◽  
Joshua M. Beckman ◽  
Marios Loukas ◽  
Mohammadali M. Shoja ◽  
Aaron A. Cohen-Gadol
Keyword(s):  
Median Nerve ◽  
Radial Nerve ◽  
Biceps Brachii ◽  
Cadaveric Study ◽  
Nerve Branch ◽  
Neural Connections ◽  
Pronator Teres ◽  
Cubital Fossa ◽  
The Mean ◽  
Potential Use

Object Various donor nerves have been used for brachial plexus neurotization procedures. To the authors' knowledge, neurotization of median nerve branches to the pronator teres to the radial nerve at the elbow have not been explored. Methods In an attempt to identify an additional nerve donor candidate for neurotization procedures of the upper limb, 20 cadaveric upper limbs underwent dissection of the cubital fossa and identification of branches of the median nerve to the pronator teres. Measurements were made of such branches, and distal transection was then performed to determine the appropriate length so that the structure could be brought to the laterally positioned radial nerve via tunneling deep to the biceps brachii muscle. Results All specimens were found to have a median nerve branch to the pronator teres that was long enough to reach the radial nerve in the cubital fossa. Neural connections remained tension free with full pronation and supination. The mean length of these branches to the pronator teres was 3.6 cm. The overall mean diameter of these nerves was 1.5 mm. The mean proximal, midpoint, and distal diameters were 2.0, 1.8, and 1.5 mm, respectively. The mean distance between the origin of these branches to the pronator teres and the medial epicondyle of the humerus was 4.1 cm. Conclusions Based on the results of our cadaveric study, the use of the branch of the median nerve to the pronator teres muscle may be considered for neurotization of the radial nerve in the cubital fossa.

Origination of the Muscular Branches of the Median Nerve

Neurosurgery ◽  
2014 ◽  
Vol 76 (2) ◽  
pp. 196-200 ◽  
Author(s):  
Bin Xu ◽  
Zhen Dong ◽  
Cheng-Gang Zhang ◽  
Yi Zhu ◽  
Dong Tian ◽  
...  
Keyword(s):  
Brachial Plexus ◽  
Median Nerve ◽  
Brachial Plexus Injury ◽  
Electrophysiological Study ◽  
Nerve Roots ◽  
Motor Branch ◽  
Lower Trunk ◽  
Pronator Teres ◽  
Finger Flexion ◽  
Flexor Digitorum

ABSTRACT BACKGROUND: In lower brachial plexus injury, finger flexion after brachialis motor branch transfer is relatively weak. We sought to screen potential branches of the median nerve from the upper trunk for strengthening finger flexion in addition to the brachialis motor branch. However, the spinal origin of the muscular branches of the median nerve based on electrophysiological study was unclear. OBJECTIVE: To determine the spinal origin of the muscular branches of the median nerve. METHODS: An intraoperative electrophysiological study was carried out in 18 patients who underwent contralateral C7 nerve transfer. After exposure of the brachial plexus nerve roots on the healthy side, the amplitude of the compound muscle action potential of each median nerve-innervated muscle was recorded while the different nerve roots were stimulated. RESULTS: The pronator teres received fibers from C5, C6, and C7. It had more contribution from C5 and C6 than from C7 (P < .05). The flexor carpi radialis was innervated mainly by C6 and C7. The nerve branches of the palmaris longus and flexor digitorum superficialis stemmed primarily from C7 and the lower trunk, and no significant difference was found between them (P > .05). The flexor digitorum profundus, flexor pollicis longus, pronator quadratus, and abductor pollicis brevis were innervated predominantly by the lower trunk (P < .05). CONCLUSION: This electrophysiological study indicates that the pronator teres branch might be the most feasible alternative donor nerve to supplement the brachialis motor branch and strengthen finger flexion after lower brachial plexus injury.

Analysis of Tsuge's Procedure for the Treatment of Radial Nerve Paralysis

Hand Surgery ◽  
2003 ◽  
Vol 08 (01) ◽  
pp. 17-20 ◽  
Author(s):  
O. Ishida ◽  
Y. Ikuta
Keyword(s):  
Radial Nerve ◽  
Wrist Joint ◽  
Middle Finger ◽  
Metacarpophalangeal Joint ◽  
Extensor Pollicis Longus ◽  
Nerve Paralysis ◽  
Radial Deviation ◽  
Pronator Teres ◽  
Extensor Carpi Radialis

Radial deviation and limited flexion of the wrist joint and a lack of abduction of the thumb have been noticed after the Riordan's procedure. Therefore, Tsuge et al. modified the Riordan's procedure, and their procedure includes transfer of the pronator teres to the extensor carpi radialis brevis, the flexor carpi radialis (FCR) to the extensor digitorum communis (EDC), and the palmaris longus to the extensor pollicis longus, along with tenodesis of the abductor pollicis longus. We reviewed the charts of 21 patients with isolated radial nerve paralysis who were treated with the Tsuge's procedure. Mean follow-up period was 11.3 years. Postoperatively, patients showed good extension of the metacarpophalangeal joint measured at the middle finger, useful flexion of the wrist joint, and decreased radial deviation of the wrist. The FCR transfer to the EDC is an excellent procedure for extension of the fingers. However, reconstruction of active abduction of the thumb remains controversial.

scholarly journals Measurements of Tendon Movement Within the Bicipital Groove After Suprapectoral Intra-articular Biceps Tenodesis in a Cadaveric Model

2021 ◽  
Vol 9 (1) ◽  
pp. 232596712097753
Author(s):  
Brian J. Kelly ◽  
Alan W. Reynolds ◽  
Patrick J. Schimoler ◽  
Alexander Kharlamov ◽  
Mark Carl Miller ◽  
...  
Keyword(s):  
Biceps Tendon ◽  
Full Range ◽  
Elbow Flexion ◽  
Biceps Tenodesis ◽  
Bicipital Groove ◽  
Biceps Tenotomy ◽  
Flexion Extension ◽  
Before And After ◽  
Long Head ◽  
Scapular Motion

Background: Lesions of the long head of the biceps can be successfully treated with biceps tenotomy or tenodesis when surgical management is elected. The advantage of a tenodesis is that it prevents the potential development of a cosmetic deformity or cramping muscle pain. Proponents of a subpectoral tenodesis believe that “groove pain” may remain a problem after suprapectoral tenodesis as a result of persistent motion of the tendon within the bicipital groove. Purpose/Hypothesis: To evaluate the motion of the biceps tendon within the bicipital groove before and after a suprapectoral intra-articular tenodesis. The hypothesis was that there would be minimal to no motion of the biceps tendon within the bicipital groove after tenodesis. Study Design: Controlled laboratory study. Methods: Six fresh-frozen cadaveric arms were dissected to expose the long head of the biceps tendon as well as the bicipital groove. Inclinometers and fiducials (optical markers) were used to measure the motions of the scapula, forearm, and biceps tendon through a full range of shoulder and elbow motions. A suprapectoral biceps tenodesis was then performed, and the motions were repeated. The motion of the biceps tendon was quantified as a function of scapular or forearm motion in each plane, both before and after the tenodesis. Results: There was minimal motion of the native biceps tendon during elbow flexion and extension but significant motion during all planes of scapular motion before tenodesis, with the most motion occurring during shoulder flexion-extension (20.73 ± 8.21 mm). The motion of the biceps tendon after tenodesis was significantly reduced during every plane of scapular motion compared with the native state ( P < .01 in all planes of motion), with a maximum motion of only 1.57 mm. Conclusion: There was a statistically significant reduction in motion of the biceps tendon in all planes of scapular motion after the intra-articular biceps tenodesis. The motion of the biceps tendon within the bicipital groove was essentially eliminated after the suprapectoral biceps tenodesis. Clinical Relevance: This arthroscopic suprapectoral tenodesis technique can significantly reduce motion of the biceps tendon within the groove in this cadaveric study, possibly reducing the likelihood of groove pain in the clinical setting.

Intra-Articular Entrapment of the Median Nerve after Dislocation of the Elbow

1987 ◽  
Vol 12 (3) ◽  
pp. 356-358
Author(s):  
S. BOE ◽  
F. HOLST-NIELSEN
Keyword(s):  
Median Nerve ◽  
Closed Reduction ◽  
Elbow Joint ◽  
Elbow Dislocation ◽  
Diagnosis And Treatment ◽  
Nerve Paralysis ◽  
Unusual Amount

A case of median nerve paralysis due to intra-articular entrapment occurring after closed reduction of a dislocation of the elbow joint is reported. In the present case, as in most other reported cases, diagnosis and treatment was delayed. If median nerve paralysis occurs following elbow dislocation and is accompanied by an unusual amount of pain, or if it occurs following reduction, entrapment should be suspected and the nerve explored without delay.

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