Anterior interosseous nerve: anatomical study and clinical implications
ABSTRACT Objective: 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 interosseo...
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| Format: | Article |
| Language: | English |
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Thieme Revinter Publicações Ltda.
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| Series: | Revista Brasileira de Ortopedia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162018000500575&lng=en&tlng=en |
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| author | Edie Benedito Caetano Luiz Angelo Vieira João José Sabongi Neto Maurício Benedito Ferreira Caetano Rodrigo Guerra Sabongi |
| author_facet | Edie Benedito Caetano Luiz Angelo Vieira João José Sabongi Neto Maurício Benedito Ferreira Caetano Rodrigo Guerra Sabongi |
| author_sort | Edie Benedito Caetano |
| collection | DOAJ |
| description | ABSTRACT Objective: 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. Methods: 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. Results: 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. Conclusion: 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. |
| first_indexed | 2024-03-07T16:39:42Z |
| format | Article |
| id | doaj.art-bb93ef58c27c47f59a53dd37443cb7be |
| institution | Directory Open Access Journal |
| issn | 1982-4378 |
| language | English |
| last_indexed | 2024-03-07T16:39:42Z |
| publisher | Thieme Revinter Publicações Ltda. |
| record_format | Article |
| series | Revista Brasileira de Ortopedia |
| spelling | doaj.art-bb93ef58c27c47f59a53dd37443cb7be2024-03-03T08:37:43ZengThieme Revinter Publicações Ltda.Revista Brasileira de Ortopedia1982-437853557558110.1016/j.rboe.2018.07.010S0102-36162018000500575Anterior interosseous nerve: anatomical study and clinical implicationsEdie Benedito CaetanoLuiz Angelo VieiraJoão José Sabongi NetoMaurício Benedito Ferreira CaetanoRodrigo Guerra SabongiABSTRACT Objective: 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. Methods: 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. Results: 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. Conclusion: 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162018000500575&lng=en&tlng=enSkeletal muscle/innervationMedian nerveNerve compression syndromePronation |
| spellingShingle | Edie Benedito Caetano Luiz Angelo Vieira João José Sabongi Neto Maurício Benedito Ferreira Caetano Rodrigo Guerra Sabongi Anterior interosseous nerve: anatomical study and clinical implications Revista Brasileira de Ortopedia Skeletal muscle/innervation Median nerve Nerve compression syndrome Pronation |
| title | Anterior interosseous nerve: anatomical study and clinical implications |
| title_full | Anterior interosseous nerve: anatomical study and clinical implications |
| title_fullStr | Anterior interosseous nerve: anatomical study and clinical implications |
| title_full_unstemmed | Anterior interosseous nerve: anatomical study and clinical implications |
| title_short | Anterior interosseous nerve: anatomical study and clinical implications |
| title_sort | anterior interosseous nerve anatomical study and clinical implications |
| topic | Skeletal muscle/innervation Median nerve Nerve compression syndrome Pronation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162018000500575&lng=en&tlng=en |
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