Actuation conditions inducing kinesthetic illusion of biceps brachii tendons

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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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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Is it the coracobrachialis superior muscle, or is it an unidentified rare variant of coracobrachialis muscle?

Surgical and Radiologic Anatomy ◽

10.1007/s00276-021-02773-y ◽

2021 ◽

Author(s):

Łukasz Olewnik ◽

Nicol Zielinska ◽

Łukasz Gołek ◽

Paloma Aragonés ◽

Jose Ramon Sanudo

Keyword(s):

Case Report ◽

Rare Variant ◽

Shoulder Joint ◽

Biceps Brachii ◽

Coracoid Process ◽

Biceps Brachii Muscle ◽

Shoulder Region

AbstractThe coracobrachialis muscle (CBM) originates from the apex of the coracoid process, in common with the short head of the biceps brachii muscle, and from the intermuscular septum. The CBM demonstrates variability in both the proximal and distal attachment, with some extremely rare varieties, such as the coracobrachialis superior, coracobrachialis longus and coracocapsularis muscle. This case report describes an extremely rare variant of the coracobrachialis superior muscle, or a very rare variant of the CBM. Our findings highlight the importance of muscle variants in the shoulder region, especially the coracoid region, and are significant for radiologists, anatomists, physiotherapists and surgeons specializing in the shoulder joint.

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Effect of Resonant Frequency Vibration on Delayed Onset Muscle Soreness and Resulting Stiffness as Measured by Shear-Wave Elastography

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18157853 ◽

2021 ◽

Vol 18 (15) ◽

pp. 7853

Author(s):

Garrett C. Jones ◽

Jonathan D. Blotter ◽

Cameron D. Smallwood ◽

Dennis L. Eggett ◽

Darryl J. Cochrane ◽

...

Keyword(s):

Resonant Frequency ◽

Shear Wave ◽

Time Course ◽

Biceps Brachii ◽

Shear Wave Elastography ◽

Upper Body ◽

Maximum Voluntary Isometric Contraction ◽

Post Exercise ◽

Significant Difference ◽

Pain Ratings

This study utilized resonant frequency vibration to the upper body to determine changes in pain, stiffness and isometric strength of the biceps brachii after eccentric damage. Thirty-one participants without recent resistance training were randomized into three groups: a Control (C) group and two eccentric exercise groups (No vibration (NV) and Vibration (V)). After muscle damage, participants in the V group received upper body vibration (UBV) therapy for 5 min on days 1–4. All participants completed a visual analog scale (VAS), maximum voluntary isometric contraction (MVIC), and shear wave elastography (SWE) of the bicep at baseline (pre-exercise), 24 h, 48 h, and 1-week post exercise. There was a significant difference between V and NV at 24 h for VAS (p = 0.0051), at 24 h and 1-week for MVIC (p = 0.0017 and p = 0.0016, respectively). There was a significant decrease in SWE for the V group from 24–48 h (p = 0.0003), while there was no significant change in the NV group (p = 0.9341). The use of UBV resonant vibration decreased MVIC decrement and reduced VAS pain ratings at 24 h post eccentric damage. SWE was strongly negatively correlated with MVIC and may function as a predictor of intrinsic muscle state in the time course of recovery of the biceps brachii.

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