Ultrasonographic findings of posterior interosseous nerve syndrome

Kim, Youdong; Ha, Doo Hoe; Lee, Sang Min

doi:10.14366/usg.17007

Cited by 39 publications

(40 citation statements)

References 17 publications

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“…In a clinical setup, electrophysiological evaluation may help in the identification of location of compression (20). The nerve entrapment syndrome is a neuropathy, which can be due to structural abnormalities like anomalous muscles and tendons (21). The strength of the present study is that, it describes 3 different morphological intermuscular connections between BL and BR, which are entrapping the radial nerve.…”

Section: Discussionmentioning

confidence: 86%

Intermuscular Connections in Anterior Brachium: its Implications in Radial Nerve Entrapment Neuropathy

Tonse

Pai

Prabhu

et al. 2019

Muscle Ligaments and Tendons J

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Background. Radial nerve (RN) is the largest branch arising from the brachial plexus, which supplies the extensor muscles and skin. This nerve may go for entrapment anywhere in its course. Muscular and tendinous variations have been implicated in various nerve entrapment syndromes along with other causes. The goal of this investigation was to observe for any connections between brachialis (BL) and brachioradialis (BR) muscles that may compress the radial nerve or its terminal branches. Methods. The study was performed on 84 formalin fixed human cadaveric upper limbs. Meticulous dissection in and around the cubital region was carried out to expose the BL, BR and the RN. The connections between the two muscles were noted and classified as muscular split type, muscular slip type and tendinous type. Results. Exploration of the cubital region revealed connecting bridges in 24 of the specimens (28.5% cases). 17 (20.2%) specimens exhibited split type, 6 (7.1%) specimens muscular slip type and 1 (1.2%) upper limb presented tendinous connection. In all these cases, the connecting bridge between the two muscles was oblique and crossed the RN. Conclusions. The results of our study reveal that various types of connections exist between the two muscles, contributing to the factors leading to radial nerve compression. Knowledge about this anatomical entity will be helpful in further understanding the aetiology of radial nerve compression and in devising effective treatment.

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Section: Discussionmentioning

confidence: 86%

Intermuscular Connections in Anterior Brachium: its Implications in Radial Nerve Entrapment Neuropathy

Tonse

Pai

Prabhu

et al. 2019

Muscle Ligaments and Tendons J

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“…In addition, the nerves used for the study came from patients with wrist pathology and possible PIN irritation. Ultrasound has shown that nerve irritation causes hypoechoic swollen, mainly of connective tissue [7] [16] .…”

Section: Discussionmentioning

confidence: 99%

The terminal branch of the posterior interosseous nerve: an anatomic and histologic study

Bonczar

Walocha

Bonczar³

et al. 2021

Folia Morphol

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Background: The aim of this study was to evaluate the terminal branch of the posterior interosseous nerve (PIN) by anatomically and histologically assessing the number, dimension, and area of its individual fascicles, by determining the dimension and area of the whole nerve itself, and by calculating the nerve density ratio (ratio of the sum of the areas of individual fascicles to the area of the whole nerve) of the terminal branch of the PIN. Methods: Twenty-eight terminal branches of the PIN nerve samples were collected from patients undergoing partial denervation of the wrist. The nerve samples were fixed in 10% buffered formalin and stained with hematoxylin and eosin to visualize their nerve bundles. Quantitative analysis of individual fascicles and the whole nerve itself were carried out. Results: Ten nerve samples (35,7%) had one single fascicle (group 1) while the remaining 18 nerve samples (64,3%) contained 2-9 fascicles (group 2). The difference in the sum of the areas of individual fascicles between the two groups did not constitute a statistical difference. Statistically significant differences (p <0.05) were seen between area of whole nerve, percentage of fascicles to the nerve surface and the cross-section maximum nerve length and width. Conclusions: The number of nerve fascicles in the terminal branch of the PIN does not affect the overall size of the nerve. The majority of the volume of multi-fascicle nerves, therefore, primarily consists of the internal perineurium. However, due to the low number of nerves, this 2 question cannot be clearly answered. This sets a further direction for further research on a larger group.

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“…6 and 7). Case reports of visualised abnormalities of PIN compression on ultrasound have been previously described [5,6].…”

Section: Discussionmentioning

confidence: 99%

Test yourself: weakness and wasting of forearm

Tachibana

Kotnis

2018

Skeletal Radiol

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Ultrasonographic findings of posterior interosseous nerve syndrome

Cited by 39 publications

References 17 publications

Intermuscular Connections in Anterior Brachium: its Implications in Radial Nerve Entrapment Neuropathy

Intermuscular Connections in Anterior Brachium: its Implications in Radial Nerve Entrapment Neuropathy

The terminal branch of the posterior interosseous nerve: an anatomic and histologic study

Test yourself: weakness and wasting of forearm

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