Electromyographs of the flexor digitorum profundus muscle are useful for the diagnosis of inclusion body myositis

2012 ◽  
Vol 46 (2) ◽  
pp. 181-186 ◽  
Author(s):  
Keiichi Hokkoku ◽  
Masahiro Sonoo ◽  
Mana Higashihara ◽  
Erik Stålberg ◽  
Teruo Shimizu
Keyword(s):  
Inclusion Body ◽  
Inclusion Body Myositis ◽  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Evolutionary adaptations in the flexor digitorum profundus muscle in Tamandua mexicana (Xenarthra, Myrmecophagidae)

2020 ◽  
Author(s):  
Juan Fernando Vélez‐García ◽  
Aura Cristina Arbeláez‐Quiñones ◽  
Karoll Dayanna Montealegre‐Hurtado
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle ◽  
Tamandua Mexicana

Anatomic variation of the innervation of the flexor digitorum profundus muscle and its clinical implications

2009 ◽  
Vol 39 (4) ◽  
pp. 498-502 ◽  
Author(s):  
Chang-Seok Oh ◽  
Hyung-Sun Won ◽  
Kyu-Seok Lee ◽  
In-Hyuk Chung ◽  
Seung Min Kim
Keyword(s):  
Anatomic Variation ◽  
Flexor Digitorum Profundus ◽  
Clinical Implications ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

scholarly journals Muscle shear wave elastography, conventional B mode and power doppler ultrasonography in healthy adults and patients with autoimmune inflammatory myopathies: a pilot cross-sectional study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Shereen Paramalingam ◽  
Merrilee Needham ◽  
Warren Raymond ◽  
Frank Mastaglia ◽  
Daniel Lightowler ◽  
...  
Keyword(s):  
Shear Wave ◽  
Inclusion Body Myositis ◽  
Normative Data ◽  
Power Doppler ◽  
Shear Wave Elastography ◽  
Flexor Digitorum Profundus ◽  
Healthy Controls ◽  
Inflammatory Myopathies ◽  
Autoimmune Myopathy ◽  
Flexor Digitorum

Abstract Background Before the role of shear wave elastography (SWE) and B mode ultrasound (US) in the diagnosis of different forms of idiopathic inflammatory myopathies (IIM) can be investigated, normative data is required. This study aimed to describe and then compare normative SWE and B mode ultrasound metrics of muscles in healthy controls and patients with IIM. Methods Twenty nine healthy adult controls and 10 IIM patients (5 with inclusion body myositis and 5 with necrotising autoimmune myopathy) underwent a full clinical examination, laboratory investigations, SWE and US measurements of selected proximal and distal limb muscles. Shear wave speed (SWS) and multiple US domains [echogenicity, fascial thickness, muscle bulk and power Doppler (PD)] were measured in both groups. Results In healthy controls (n = 29; mean age 46.60 ± 16.10; 44.8 % female), age was inversely correlated with SWS at the deltoid (stretch) (Rs. -0.40, p = 0.030) and PD score at the deltoid (rest) (Rs. -0.40, P = 0.032). Those ≥ 50 years old had a lower SWS at the deltoid (stretch) compared to the < 50 year group (2.92 m/s vs. 2.40 m/s, P = 0.032). Age correlated with increased echogenicity in the flexor digitorum profundus (Rs. 0.38, P = 0.045). Females had a smaller muscle bulk in the deltoid (P = 0.022). Body mass index (BMI) was inversely associated with SWS in the deltoid (stretch) (Rs – 0.45, P = 0.026), and positively correlated with echogenicity in the deltoid (Rs. 0.69, P = 0.026). In patients ≥50 years of age, patients with IIM (mean age 61.00 ± 8.18; females 20.0 %) had a higher proportion of abnormal echogenicity scores at the flexor digitorum profundus (FDP) (40.00 % vs. 14.30 %, P = 0.022) and tibialis anterior (TA) (80.00 % vs. 28.60 %, P = 0.004). Fascial thickness was lower in the FDP (0.63mm vs. 0.50mm, p = 0.012) and TA (0.58mm vs. 0.45mm, P = 0.001). Conclusions Our findings suggest there is scope for US techniques to be useful for diagnostic screening of affected muscles in patients with IIM, especially in those with suspected inclusion body myositis or necrotising autoimmune myopathy. We provide normative data for future studies into SWE and US techniques in skeletal muscle. The differences between IIM patients and controls warrant further study in a broader IIM patient cohort.

Congenital Shortening of the Flexor Digitorum Profundus Muscle

2007 ◽  
Vol 32 (2) ◽  
pp. 168-171 ◽  
Author(s):  
Takehiko Takagi ◽  
Shinichiro Takayama ◽  
Hiroyasu Ikegami ◽  
Toshiyasu Nakamura
Keyword(s):  
Flexor Digitorum Profundus ◽  
Flexor Digitorum ◽  
Flexor Digitorum Profundus Muscle

Short-Term Synchronization Between Motor Units in Different Functional Subdivisions of the Human Flexor Digitorum Profundus Muscle

2004 ◽  
Vol 92 (2) ◽  
pp. 734-742 ◽  
Author(s):  
Karen T. Reilly ◽  
Michael A. Nordstrom ◽  
Marc H. Schieber
Keyword(s):  
Motor Units ◽  
Flexor Digitorum Profundus ◽  
Short Term ◽  
Common Input ◽  
Limited Ability ◽  
Motoneuron Pool ◽  
Flexor Digitorum ◽  
Human Nervous System ◽  
Central Factors ◽  
Flexor Digitorum Profundus Muscle

The ability to independently move the digits is limited by peripheral as well as central factors. A central limitation to independent finger movements might arise from the inability of the human nervous system to activate motor units (MUs) that exert force on one finger without also activating MUs that exert force on adjacent fingers. Short-term synchronization between MU pairs is thought to be the result of the two motoneurons receiving common input from last-order neuronal projections. The human flexor digitorum profundus (FDP) muscle contains four subdivisions, one for each of the fingers. We hypothesized that the distribution of MU synchrony within and between subdivisions of FDP might parallel the ability to selectively activate different functional subdivisions within FDP, and the ability to flex one digit independently of another. We found that the degree of MU synchrony indeed was not uniform among the different functional subdivisions of FDP; MUs acting on ulnar digits (d5, d4) were more synchronized than MUs acting on radial digits (d2, d3). Furthermore, synchrony was observed between MU pairs where each unit acted on a different digit and was highest when both units of a pair acted on the least-independent digits (d4, d5). This indicates that the CNS does not exert completely independent control over the different functional subdivisions of FDP. The strength of synchrony appears related to the inability to produce completely independent forces or movements with the digits. These observations reflect widespread divergence of last-order inputs within the FDP motoneuron pool, and we suggest that the organization of the CNS drive to this muscle contributes to the limited ability of humans to flex one digit in isolation from other digits.

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