Comparison of muscle sounds at rest in biceps brachii and paraspinal muscle in man

AbstractThe coexistence of different muscular-neurovascular variations is of significant clinical importance. A male cadaver, 76 years old at death, was subjected to routine anatomical dissection; the procedure was performed for research and teaching purposes at the Department of Anatomical Dissection and Donation, Medical University of Lodz. The right forearm and hand were dissected using standard techniques according to a strictly specified protocol. The presence accessory head of the flexor pollicis longus may potentially compress the anterior interosseous nerve. The present case report describes a rare variant of the ulnar head of the pronator teres, characterized by two independent bands (i.e., two proximal attachments). The main band originates from the coronoid process and the second originates from the tendon of the biceps brachii. This type of attachment could potentially affect the compression of the ulnar artery running between the two bands. Additionally, the accessory head of the flexor pollicis longus was observed, which started on the medial epicondyle; its coexistence with a high division median nerve creates a potential pressure site on the anterior interesosseous nerve.

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The Association Between the Rotator Cuff Status and the Severity and Recovery of Weakness in the Shoulder Abductor Strength in a Case of Proximal Type Cervical Spondylotic Amyotrophy

Global Spine Journal ◽

10.1177/2192568220980441 ◽

2020 ◽

pp. 219256822098044

Author(s):

Sho Ishiwata ◽

Yoichi Iizuka ◽

Hitoshi Shitara ◽

Tokue Mieda ◽

Eiji Takasawa ◽

...

Keyword(s):

Rotator Cuff ◽

Biceps Brachii ◽

Case Series ◽

Manual Muscle Test ◽

Cuff Tear ◽

Cervical Spondylotic Amyotrophy ◽

Case Series Study ◽

Shoulder Abductor ◽

Series Study

Study Design: Case series study. Objective: We aimed to clarify the prevalence of rotator cuff tear (RCT), and the association between RCT and the severity and prognosis in patients with proximal type cervical spondylotic amyotrophy (CSA). Methods: We retrospectively analyzed 35 proximal type CSA patients who were treated conservatively. The following data was collected: age, rotator cuff status on MRI, manual muscle test (MMT) score of shoulder abductor and biceps brachii muscles both at the first visit and final follow-up. We investigated the prevalence of RCT and the association between the rotator cuff status, and the severity and recovery of upper extremity weakness in patients with proximal type CSA. Results: Of the 35 patients, 21 had an RCT on MRI, indicating that the prevalence of RCT in patients with proximal type CSA was 60%. An age-adjusted analysis showed that the presence of RCT was significantly associated with the MMT score of the shoulder abductor muscles both at the first visit and at the final follow-up. The presence of RCT was significantly associated with the recovery of the shoulder abductor muscles. The size of the RCT was negatively correlated with the MMT score of the shoulder abductor muscles at the final follow-up. The size of the RCT was independently correlated with the change of the MMT score of the shoulder abductor muscles. Conclusion: RCT was detected in >50% in patients with proximal type CSA, and the presence and severity of RCT can be used as prognostic factors for proximal type CSA patients who are treated conservatively.

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Radiological Assessment of Postoperative Paraspinal Muscle Changes After Lumbar Interbody Fusion With or Without Minimally Invasive Techniques

Global Spine Journal ◽

10.1177/2192568221994794 ◽

2021 ◽

pp. 219256822199479

Author(s):

Keigo Kameyama ◽

Tetsuro Ohba ◽

Tomoka Endo ◽

Marina Katsu ◽

Fujita Koji ◽

...

Keyword(s):

Minimally Invasive ◽

Interbody Fusion ◽

Cross Sectional Area ◽

Paraspinal Muscle ◽

Lumbar Interbody Fusion ◽

Sectional Area ◽

Paraspinal Muscles ◽

Cross Sectional ◽

Muscle Density ◽

Muscle Changes

Study Design: Retrospective cohort study. Background: Percutaneous pedicle screws (PPS) have the advantage of being able to better preserve the paraspinal muscles when compared with a traditional open approach. However, the nature of changes in postoperative paraspinal muscle after damage by lumbar fusion surgery has remained largely unknown. It is clinically important to clarify and compare changes in paraspinal muscles after the various surgeries. Objective: (1) To determine postoperative changes of muscle density and cross-sectional area using computed tomography (CT), and (2) to compare paraspinal muscle changes after posterior lumbar interbody fusion (PLIF) with traditional open approaches and minimally invasive lateral lumbar interbody fusions (LLIF) with PPS. Methods: We included data from 39 consecutive female patients who underwent open PLIF and 23 consecutive patients who underwent single-staged treatment with LLIF followed by posterior PPS fixation at a single level (L4-5). All patients underwent preoperative, 6 months postoperative, and 1-year postoperative CT imaging. Measurements of the cross-sectional area (CSA) and muscle densities of paraspinal muscles were obtained using regions of interest defined by manual tracing. Results: We did not find any decrease of CSA in any paraspinal muscles. We did find a decrease of muscle density in the multifidus at 1 year after surgery in patients in the PILF group, but not in those in LLIF/PPS group. Conclusions: One year after surgery, a significant postoperative decrease of muscle density of the multifidi was observed only in patients who underwent open PLIF, but not in those who underwent LLIF/PPS.

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Joint angle based motor point tracking stimulation for surface FES: A Study on biceps brachii

Medical Engineering & Physics ◽

10.1016/j.medengphy.2020.11.014 ◽

2021 ◽

Vol 88 ◽

pp. 9-18

Author(s):

Kento Ichikawa ◽

Yinlai Jiang ◽

Masao Sugi ◽

Shunta Togo ◽

Hiroshi Yokoi

Keyword(s):

Joint Angle ◽

Biceps Brachii ◽

Motor Point ◽

Point Tracking

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The Role of Deadlifts in Distal Biceps Brachii Tendon Ruptures: An Alternative Mechanism Described With YouTube Videos

Orthopaedic Journal of Sports Medicine ◽

10.1177/2325967121991811 ◽

2021 ◽

Vol 9 (3) ◽

pp. 232596712199181

Author(s):

Mehmet Kapicioglu ◽

Emre Bilgin ◽

Necip Guven ◽

Anil Pulatkan ◽

Kerem Bilsel

Keyword(s):

Tendon Rupture ◽

Biceps Brachii ◽

Biceps Tendon ◽

Alternative Mechanism ◽

Distal Biceps Tendon ◽

Distal Biceps ◽

Biceps Tendon Rupture ◽

Significant Difference ◽

Biceps Brachii Tendon ◽

Youtube Videos

Background: The classic injury mechanism of a distal biceps brachii tendon rupture (DBBTR) is eccentric loading to the flexed elbow when the forearm is supinated. Purpose: To determine alternative mechanisms of a DBBTR in powerlifting sports, particularly in deadlift competitions, with the use of YouTube videos. Study Design: Descriptive epidemiology study. Methods: A search on YouTube was performed using the search terms “distal biceps tendon rupture” and “distal biceps tendon injury” combined with “competition,” “deadlift,” and “powerlifting.” The videos underwent an evaluation for accuracy by 3 surgeons according to predetermined criteria. Type of sports activity, participant sex, side of the injury, and arm positions at the time of the injury were recorded. Results: Among the videos reviewed, 35 injuries were found appropriate for an evaluation. All participants were male. The majority of the injuries (n = 25) were observed during the deadlift. Only in 1 deadlift injury were both forearms in supination. In the remaining deadlift injuries (n = 24), all elbows were in extension, with 1 forearm in supination and the other in pronation. Among the deadlift injuries in the mixed-grip position, all ruptures occurred in a supinated extremity: 25% (n = 6) of ruptures occurred on the right side, and 75% (n = 18) of ruptures occurred on the left side; this was a significant difference ( P = .014). Conclusion: We described an alternative mechanism for a DBBTR, namely, eccentric loading to an extended elbow when the forearm is supinated during the deadlift. As all the ruptures occurred in a supinated extremity, holding the bar with both forearms in pronation may prevent or decrease the risk of ruptures during the deadlift.

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Effects of the High-Induction Magnetic Stimulation on Viscoelastic Properties of the Biceps Brachii

IEEE Access ◽

10.1109/access.2021.3062783 ◽

2021 ◽

Vol 9 ◽

pp. 47136-47143

Author(s):

Jaroslav Prucha ◽

Lenka Hanakova ◽

Vladimir Socha ◽

Ales Richter

Keyword(s):

Viscoelastic Properties ◽

Magnetic Stimulation ◽

Biceps Brachii ◽

High Induction

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