scholarly journals A Rare Anomaly of the Long Head of the Biceps Brachii Muscle

2018 ◽  
Vol 11 (1) ◽  
pp. 56-57
Author(s):  
S Kumar ◽  
R Baidya ◽  
P Baral
Keyword(s):  
Congenital Anomalies ◽  
Elbow Joint ◽  
Biceps Brachii ◽  
Biceps Tendon ◽  
Biceps Brachii Muscle ◽  
Rare Anomaly ◽  
Long Head Of Biceps ◽  
Long Head

Introduction: Biceps brachii is a muscle of arm which brings about supination when fore-arm is flexed and flexion of elbow joint. Proximally it is attached with two heads: long and short heads.Case report: The absence of long head of biceps brachii muscle is very rare anomaly. It may be unilateral or bilateral with or without other congenital anomalies. The exact prevalence of this anomaly is unknown. This anomaly has been reported to occur as the result of an insult to the fetus during the sixth or seventh week of gestation, at which time the long head of the biceps tendon is developing. J-GMC-N | Volume 11 | Issue 01 | January-June 2018, Page:56-57

scholarly journals Bilateral Congenital Agenesis of the Long Head of the Biceps Tendon: The Beginning

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Francisco Rego Costa ◽  
Cátia Esteves ◽  
Lina Melão
Keyword(s):  
Magnetic Resonance ◽  
Rotator Cuff ◽  
Biceps Brachii ◽  
Biceps Tendon ◽  
Congenital Absence ◽  
Biceps Brachii Muscle ◽  
Fourth Case ◽  
Labral Tears ◽  
Long Head ◽  
Congenital Agenesis

The biceps brachii muscle is prone to variants but absence of the long head of the biceps (LHB) tendon is an exceptionally rare anomaly. This report concerns the fourth case of bilateral congenital absence of the LHB tendon and presents the ultrasonography (US) and magnetic resonance (MR) findings. Our case has the peculiarity of being the first in which bilateral LHB tendon agenesis is not associated with rotator cuff or labral tears.

scholarly journals Muscle length and joint angle influence spinal but not corticospinal excitability to the biceps brachii across forearm postures

2019 ◽  
Vol 122 (1) ◽  
pp. 413-423 ◽  
Author(s):  
Davis A. Forman ◽  
Daniel Abdel-Malek ◽  
Christopher M. F. Bunce ◽  
Michael W. R. Holmes
Keyword(s):  
Isometric Contraction ◽  
Elbow Joint ◽  
Joint Angle ◽  
Biceps Brachii ◽  
Motor Evoked Potentials ◽  
Muscle Length ◽  
Elbow Flexion ◽  
Corticospinal Excitability ◽  
Biceps Brachii Muscle ◽  
Spinal Excitability

Forearm rotation (supination/pronation) alters corticospinal excitability to the biceps brachii, but it is unclear whether corticospinal excitability is influenced by joint angle, muscle length, or both. Thus the purpose of this study was to separately examine elbow joint angle and muscle length on corticospinal excitability. Corticospinal excitability to the biceps and triceps brachii was measured using motor evoked potentials (MEPs) elicited via transcranial magnetic stimulation. Spinal excitability was measured using cervicomedullary motor evoked potentials (CMEPs) elicited via transmastoid electrical stimulation. Elbow angles were manipulated with a fixed biceps brachii muscle length (and vice versa) across five unique postures: 1) forearm neutral, elbow flexion 90°; 2) forearm supinated, elbow flexion 90°; 3) forearm pronated, elbow flexion 90°; 4) forearm supinated, elbow flexion 78°; and 5) forearm pronated, elbow flexion 113°. A musculoskeletal model determined biceps brachii muscle length for postures 1–3, and elbow joint angles ( postures 4–5) were selected to maintain biceps length across forearm orientations. MEPs and CMEPs were elicited at rest and during an isometric contraction of 10% of maximal biceps muscle activity. At rest, MEP amplitudes to the biceps were largest during supination, which was independent of elbow joint angle. CMEP amplitudes were not different when the elbow was fixed at 90° but were largest in pronation when muscle length was controlled. During an isometric contraction, there were no significant differences across forearm postures for either MEP or CMEP amplitudes. These results highlight that elbow joint angle and biceps brachii muscle length can each independently influence spinal excitability. NEW & NOTEWORTHY Changes in upper limb posture can influence the responsiveness of the central nervous system to artificial stimulations. We established a novel approach integrating neurophysiology techniques with biomechanical modeling. Through this approach, the effects of elbow joint angle and biceps brachii muscle length on corticospinal and spinal excitability were assessed. We demonstrate that spinal excitability is uniquely influenced by joint angle and muscle length, and this highlights the importance of accounting for muscle length in neurophysiological studies.

scholarly journals Rotator Cuff Anterior Cable Reconstruction With Long Head of Biceps Tendon Autograft

2020 ◽  
Vol 9 (6) ◽  
pp. e711-e715
Author(s):  
Raymond E. Chen ◽  
Wajeeh R. Bakhsh ◽  
Jason S. Lipof ◽  
Zachary G. McVicker ◽  
Ilya Voloshin
Keyword(s):  
Rotator Cuff ◽  
Biceps Tendon ◽  
Long Head Of Biceps ◽  
Long Head ◽  
Tendon Autograft

Anomalous Intraarticular Origin of the Long Head of Biceps Brachii

2003 ◽  
Vol 13 (2) ◽  
pp. 122-124 ◽  
Author(s):  
David P. Richards ◽  
Michael Schwartz
Keyword(s):  
Biceps Brachii ◽  
Long Head Of Biceps ◽  
Long Head

What happens to the long head of the biceps tendon after arthroscopic rotator cuff repair?

2020 ◽  
Vol 102-B (9) ◽  
pp. 1194-1199
Author(s):  
Hyo-Jin Lee ◽  
Eung-Sic Kim ◽  
Yang-Soo Kim
Keyword(s):  
Rotator Cuff ◽  
Rotator Cuff Repair ◽  
Biceps Brachii ◽  
Morphological Changes ◽  
Biceps Tendon ◽  
Cross Sectional ◽  
Postoperative Changes ◽  
Long Head ◽  
Arthroscopic Rotator Cuff ◽  
Cuff Repair

Aims The purpose of this study was to identify the changes in untreated long head of the biceps brachii tendon (LHBT) after a rotator cuff tear and to evaluate the factors related to the changes. Methods A cohort of 162 patients who underwent isolated supraspinatus with the preservation of LHBT was enrolled and evaluated. The cross-sectional area (CSA) of the LHBT on MRI was measured in the bicipital groove, and preoperative to postoperative difference was calculated at least 12 months postoperatively. Second, postoperative changes in the LHBT including intratendinous signal change, rupture, dislocation, or superior labral lesions were evaluated with seeking of factors that were correlated with the changes or newly developed lesions after rotator cuff repair. Results The postoperative CSA (12.5 mm2 (SD 8.3) was significantly larger than preoperative CSA (11.5 mm2 (SD 7.5); p = 0.005). In total, 32 patients (19.8%) showed morphological changes in the untreated LHBT 24 months after rotator cuff repair. Univariate regression analysis revealed that the factor chiefly related to the change in LHBT status was an eccentric LHBT position within the groove found on preoperative MRI (p = 0.011). Multivariate analysis using logistic regression also revealed that an eccentric LHBT position was a factor related to postoperative change in untreated LHBTs (p = 0.011). Conclusion The CSA of the LHBT inside the biceps groove increased after rotator cuff repair. The preoperative presence of an eccentrically positioned LHBT was associated with further changes of the tendon itself after rotator cuff repair. Cite this article: Bone Joint J 2020;102-B(9):1194–1199.

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