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- W3146902245 abstract "Analisar as relações anatômicas e as variações do nervo interósseo anterior e suas implicações clínicas. A paralisia completa do nervo interósseo anterior resulta na incapacidade de fletir as falanges distal do polegar e indicador; na incompleta, ocorre menor dano axonal e apenas o polegar ou o indicador são afetados. Este estudo baseou‐se na dissecção de 50 membros de 25 cadáveres, 22 eram do sexo masculino e três do feminino. A idade variou entre 28 e 77 anos, 14 da etnia branca e 11 não branca; 18 foram preparados por injeção intra‐arterial de uma solução de glicerina e formol a 10% e sete foram dissecados a fresco. O nervo interósseo anterior originou‐se do nervo mediano em média de 5,2 cm distal à linha intercondilar. Em 29 membros, originou‐se dos fascículos nervosos da região posterior do nervo mediano e em 21 membros, dos fascículos posterolaterais. Em 41 membros, o nervo interósseo anterior posicionava‐se entre as cabeças umeral e ulnar do músculo pronador redondo. Em dois membros, observou‐se a duplicação do nervo interósseo anterior. Em todos os membros, registramos que o nervo interósseo anterior se desprendia do nervo mediano proximalmente à arcada do músculo flexor superficial dos dedos. Em 24 antebraços a ramificação do nervo interósseo anterior ocorreu proximalmente à arcada do músculo flexor superficial dos dedos em 26, distalmente. As bandas fibrosas formadas pelas cabeças umeral e ulnar do músculo pronador redondo, a arcada fibrosa do músculo flexor superficial dos dedos e o músculo de Gantzer, quando hipertrofiado e posicionado anteriormente ao nervo interósseo anterior, podem comprimir o nervo contra estruturas profundas, alterar seu curso normal, por estreitar o espaço de sua passagem, causar alterações no músculo flexor longo do polegar e no flexor profundo dos dedos da mão. The goal of this study was to describe anatomical variations and clinical implications of anterior interosseous nerve. In complete anterior interosseous nerve palsy, the patient is unable to flex the distal phalanx of the thumb and index finger; in incomplete anterior interosseous nerve palsy, there is less axonal damage, and either the thumb or the index finger are affected. This study was based on the dissection of 50 limbs of 25 cadavers, 22 were male and three, female. Age ranged from 28 to 77 years, 14 were white and 11 were non‐white; 18 were prepared by intra‐arterial injection of a solution of 10% glycerol and formaldehyde, and seven were freshly dissected cadavers. The anterior interosseous nerve arose from the median nerve, an average of 5.2 cm distal to the intercondylar line. In 29 limbs, it originated from the nerve fascicles of the posterior region of the median nerve and in 21 limbs, of the posterolateral fascicles. In 41 limbs, the anterior interosseous nerve positioned between the humeral and ulnar head of the pronator teres muscle. In two limbs, anterior interosseous nerve duplication was observed. In all members, it was observed that the anterior interosseous nerve arose from the median nerve proximal to the arch of the flexor digitorum superficialis muscle. In 24 limbs, the branches of the anterior interosseous nerve occurred proximal to the arch and in 26, distal to it. The fibrous arches formed by the humeral and ulnar heads of the pronator teres muscle, the fibrous arch of the flexor digitorum superficialis muscle, and the Gantzer muscle (when hypertrophied and positioned anterior to the anterior interosseous nerve), can compress the nerve against deep structures, altering its normal course, by narrowing its space, causing alterations longus and flexor digitorum profundus muscles." @default.
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- W3146902245 date "2018-09-01" @default.
- W3146902245 modified "2023-10-17" @default.
- W3146902245 title "Nervo interósseo anterior: estudo anatômico e implicações clínicas" @default.
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- W3146902245 doi "https://doi.org/10.1016/j.rbo.2017.06.017" @default.
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