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Jayme Augusto Bertelli - One of the best experts on this subject based on the ideXlab platform.
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free gracilis transfer reinnervated by the nerve to the Supinator for the reconstruction of finger and thumb extension in longstanding c7 t1 brachial plexus root avulsion
Journal of Hand Surgery (European Volume), 2013Co-Authors: Francisco Soldado, Jayme Augusto BertelliAbstract:Purpose To report the clinical results of a free gracilis Muscle transfer to finger and thumb extensors reinnervated by Supinator Muscle motor branches in patients with longstanding C7-T1 root avulsion. Methods Between January 2010 and January 2011, 3 young adult patients with traumatic C7-T1 brachial plexus palsies had gracilis transfer to the thumb and finger extensors at a mean of 38 months after injury. The Muscle flap was connected to radial vessels and comitant veins and to nerve branches supplying the Supinator Muscle . Results All patients had recovery of active thumb and finger extension, scoring M3 and M4 on the Medical Research Council scale, respectively, at a mean of 12 months after surgery. Conclusions Reconstruction of finger and thumb extension in lower-type brachial plexus injuries is a challenging problem that is most commonly addressed with an extensor tenodesis technique, which depends on wrist flexion. Free gracilis transfer innervated by nerve branches to the Supinator provided the restoration of thumb and finger extension independent of wrist flexion. Clinical relevance For those patients with lower brachial root injury more than a year old, transfer of a free functional gracilis Muscle is an alternative for the reconstruction of thumb and finger extension. Type of study/level of evidence Therapeutic IV.
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transfer of the Supinator Muscle to the extensor pollicis brevis for thumb extension reconstruction in c7 t1 brachial plexus palsy
Journal of Hand Surgery (European Volume), 2010Co-Authors: Jayme Augusto Bertelli, Marcos Flavio Ghizoni, Cristiano Paulo TaccaAbstract:With C7-T1 brachial plexus injuries, finger motion is absent while shoulder, elbow and wrist function are largely preserved. Previously, we have reconstructed finger flexion by transferring the brachialis Muscle to the flexor digitorum profundus and flexor pollicis longus; and we have restored extension of thumb and finger by transferring the motor nerve to the Supinator to the posterior interosseous nerve, which is only feasible in fresh injuries. We describe the transfer of the Supinator Muscle to the extensor pollicis brevis to reanimate thumb extension in patients with long standing C7-T1 brachial plexus palsy.
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TRANSFER O F T HE S UPINATOR M USCLE T O T HE EXTENSOR P OLLICIS B REVIS F OR T HUMB E XTENSION RECONSTRUCTION I N C 7-T1 B RACHIAL P LEXUS P ALSY
2010Co-Authors: Jayme Augusto Bertelli, Marcos Flavio Ghizoni, Cristiano Paulo TaccaAbstract:>> With C7-T1 brachial plexus injuries, finger motion is absent while shoulder, elbow and wrist function are largely preserved. Previously, we have reconstructed finger flexion by transferring the brachialis Muscle to the flexor digitorum profundus and flexor pollicis longus; and we have restored extension of thumb and finger by transferring the motor nerve to the Supinator to the posterior interosseous nerve, which is only feasible in fresh injuries. We describe the transfer of the Supinator Muscle to the extensor pollicis brevis to reanimate thumb extension in patients with long standing C7-T1 brachial plexus palsy.
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Anatomical feasibility of transferring Supinator motor branches to the posterior interosseous nerve in C7-T1 brachial plexus palsies. Laboratory investigation.
Journal of neurosurgery, 2009Co-Authors: Jayme Augusto Bertelli, Paulo Roberto Kechele, Marcos Antonio Santos, Bruno Adler Maccagnan Pinheiro Besen, Hamilton DuarteAbstract:Object In C7–T1 palsies of the brachial plexus, shoulder and elbow function is preserved, but finger motion is absent. Finger flexion has been reconstructed using tendon or nerve transfers. Finger extension has been restored ineffectively by attaching the extensor tendons to the distal side of the dorsal radius (that is, tenodesis). In these types of nerve palsy, Supinator Muscle function is preserved because innervation stems from the C-6 root. In the present study, the authors investigated the anatomy and the feasibility of transferring the Supinator motor branches to the posterior interosseous nerve. Sacrifice of the Supinator motor branches does not abolish supination because biceps Muscle function is preserved in lower-type injuries of the brachial plexus. Methods The posterior interosseous nerve was dissected in 20 formalin-fixed forearms. Through posterior forearm access, the posterior interosseous nerve and its motor branches to the Supinator Muscle were dissected. Specimens were removed for histo...
Kazuo Kiguchi - One of the best experts on this subject based on the ideXlab platform.
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Tremor Suppression With Mechanical Vibration Stimulation
IEEE Access, 2020Co-Authors: Wenbin Liu, Takeru Kai, Kazuo KiguchiAbstract:Tremor, which is one of the most common movement disorders, is a repetitive movement that is caused by periodic Muscle contraction and relaxation. To suppress tremors of upper-limb tremor patients, such as essential tremor (ET) patients, many kinds of devices have been developed. On the other hand, when mechanical vibration stimulation is applied to a human Muscle, sustained Muscle contraction, which is referred to as the tonic vibration reflex (TVR), is induced in the stimulated Muscle. In this study, a novel tremor suppression method that utilizes the periodic TVR to induce Muscle contraction/relaxation to generate the counterphase motion of the ET is proposed and applied to the forearm pronation-supination ET. In the proposed method, periodic vibration stimulation is applied to generate the periodic TVR in the pronator teres Muscle and/or Supinator Muscle. First, the results confirmed that the TVR can be induced by applying mechanical vibration stimulation to the pronator teres Muscle and Supinator Muscle since the forearm pronation-supination tremor is one of the key features of the ET. Furthermore, the findings also confirmed that the TVR intensity that is induced in these Muscles can be adjusted by changing the vibration stimulation frequency. Second, the results show that the counterphase motion of the ET (i.e., periodic pronation-supination motion) can be generated by applying the proposed method. The effectiveness of the proposed method for tremor suppression is evaluated by comparing the generated motion with the ET motion.
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the motion change of forearm pronation supination with vibration stimulation for upper limb perception assist
World Automation Congress, 2018Co-Authors: Koki Honda, Kazuo KiguchiAbstract:Human elbow joint flexion/extension motion can be changed by giving vibration stimulation on biceps brachii or triceps brachii. Our final goal is to carry out the upper-limb perception-assist by using this method. In the upper-limb perception-assist, not only elbow joint motion but also some other joint motions should be changed. This study focused on the motion change of forearm's supination/pronation using vibration stimulation. To investigate the possibility of the motion change of forearm's supination/pronation, some experiments were carried out in this study. At first, vibration stimulation was given to Supinator Muscle or pronator teres Muscle during single supination/pronation of forearm. Then, vibration stimulation was given to the same Muscles during continuous supination/pronation. The experimental results show that the motion change of supination/pronation can be generated by giving vibration stimulation on Supinator Muscle or pronator teres Muscle. Furthermore, it is found that the motion change of supination/pronation can be generated soon after vibration stimulation is given to those Muscles during continuous supination/pronation.
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WAC - The Motion Change of Forearm Pronation/Supination with Vibration Stimulation for Upper-Limb Perception-Assist
2018 World Automation Congress (WAC), 2018Co-Authors: Koki Honda, Kazuo KiguchiAbstract:Human elbow joint flexion/extension motion can be changed by giving vibration stimulation on biceps brachii or triceps brachii. Our final goal is to carry out the upper-limb perception-assist by using this method. In the upper-limb perception-assist, not only elbow joint motion but also some other joint motions should be changed. This study focused on the motion change of forearm's supination/pronation using vibration stimulation. To investigate the possibility of the motion change of forearm's supination/pronation, some experiments were carried out in this study. At first, vibration stimulation was given to Supinator Muscle or pronator teres Muscle during single supination/pronation of forearm. Then, vibration stimulation was given to the same Muscles during continuous supination/pronation. The experimental results show that the motion change of supination/pronation can be generated by giving vibration stimulation on Supinator Muscle or pronator teres Muscle. Furthermore, it is found that the motion change of supination/pronation can be generated soon after vibration stimulation is given to those Muscles during continuous supination/pronation.
Liang Chen - One of the best experts on this subject based on the ideXlab platform.
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Supinator motor branch transfer to the posterior interosseous nerve in C7-T1 brachial plexus palsies: an anatomical study
Chinese Journal of Hand Surgery, 2012Co-Authors: Lei Zhang, Zhen Dong, Cheng-gang Zhang, Liang ChenAbstract:Objective To investigate the anatomical feasibility of transferring the Supinator motor branches to the posterior interosseous nerve in treating C7-T1 brachial plexus palsies and to explore the optimal surgical approach of this technique. Methods The branches of the radial nerve distal to the elbow were dissected in 13 formalin-embalmed forearms.Branching pattern,distribution and diameter of the Supinator motor branches and the posterior interosseous nerve were recorded and measured. Results Most frequently,three Supinator motor branches were observed,among which two were located proximal to the arcade of Frohse (the proximal margin of Supinator Muscle) and one branch laid within the Supinator tunnel.The two extra-tunnel branches were anatomically constant and could be directly coapted with the posterior interosseous nerve.Conclusion It is anatomically feasible to transfer the Supinator motor branches directly to the posterior interosseous nerve to restore thumb and finger extension in patients with C7-T1 brachial plexus palsies. Key words: Radial nerve; Brachial plexus; Supinator; Muscle branch; Posterior interosseous nerve
Cristiano Paulo Tacca - One of the best experts on this subject based on the ideXlab platform.
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transfer of the Supinator Muscle to the extensor pollicis brevis for thumb extension reconstruction in c7 t1 brachial plexus palsy
Journal of Hand Surgery (European Volume), 2010Co-Authors: Jayme Augusto Bertelli, Marcos Flavio Ghizoni, Cristiano Paulo TaccaAbstract:With C7-T1 brachial plexus injuries, finger motion is absent while shoulder, elbow and wrist function are largely preserved. Previously, we have reconstructed finger flexion by transferring the brachialis Muscle to the flexor digitorum profundus and flexor pollicis longus; and we have restored extension of thumb and finger by transferring the motor nerve to the Supinator to the posterior interosseous nerve, which is only feasible in fresh injuries. We describe the transfer of the Supinator Muscle to the extensor pollicis brevis to reanimate thumb extension in patients with long standing C7-T1 brachial plexus palsy.
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TRANSFER O F T HE S UPINATOR M USCLE T O T HE EXTENSOR P OLLICIS B REVIS F OR T HUMB E XTENSION RECONSTRUCTION I N C 7-T1 B RACHIAL P LEXUS P ALSY
2010Co-Authors: Jayme Augusto Bertelli, Marcos Flavio Ghizoni, Cristiano Paulo TaccaAbstract:>> With C7-T1 brachial plexus injuries, finger motion is absent while shoulder, elbow and wrist function are largely preserved. Previously, we have reconstructed finger flexion by transferring the brachialis Muscle to the flexor digitorum profundus and flexor pollicis longus; and we have restored extension of thumb and finger by transferring the motor nerve to the Supinator to the posterior interosseous nerve, which is only feasible in fresh injuries. We describe the transfer of the Supinator Muscle to the extensor pollicis brevis to reanimate thumb extension in patients with long standing C7-T1 brachial plexus palsy.
Hamilton Duarte - One of the best experts on this subject based on the ideXlab platform.
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Anatomical feasibility of transferring Supinator motor branches to the posterior interosseous nerve in C7-T1 brachial plexus palsies. Laboratory investigation.
Journal of neurosurgery, 2009Co-Authors: Jayme Augusto Bertelli, Paulo Roberto Kechele, Marcos Antonio Santos, Bruno Adler Maccagnan Pinheiro Besen, Hamilton DuarteAbstract:Object In C7–T1 palsies of the brachial plexus, shoulder and elbow function is preserved, but finger motion is absent. Finger flexion has been reconstructed using tendon or nerve transfers. Finger extension has been restored ineffectively by attaching the extensor tendons to the distal side of the dorsal radius (that is, tenodesis). In these types of nerve palsy, Supinator Muscle function is preserved because innervation stems from the C-6 root. In the present study, the authors investigated the anatomy and the feasibility of transferring the Supinator motor branches to the posterior interosseous nerve. Sacrifice of the Supinator motor branches does not abolish supination because biceps Muscle function is preserved in lower-type injuries of the brachial plexus. Methods The posterior interosseous nerve was dissected in 20 formalin-fixed forearms. Through posterior forearm access, the posterior interosseous nerve and its motor branches to the Supinator Muscle were dissected. Specimens were removed for histo...