Human evolution and tears of the rotator cuff

Craik, Johnathan D.; Mallina, Ravi; Ramasamy, Vijayraj; Little, Nicholas

doi:10.1007/s00264-013-2204-y

Cited by 13 publications

(12 citation statements)

References 22 publications

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“…This wrapping amount is increased where the radius of the humeral head is greater, which is determined laterally by the greater tubercle projection. Therefore, it is not the acromion projection relative to glenoid (Ciochon & Corruccini, 1977; Corruccini & Ciochon, 1976; Craik et al, 2014), but rather the relationship between acromion projection and greater tubercle projection that is more relevant to deltoid leverage (Rietveld et al, 1988). The latter is described by Nyffeler et al (2006) as the acromion index.…”

Section: Discussionmentioning

confidence: 99%

Exploring the functional morphology of the Gorilla shoulder through musculoskeletal modelling

et al. 2021

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Musculoskeletal computer models allow us to quantitatively relate morphological features to biomechanical performance. In non‐human apes, certain morphological features have long been linked to greater arm abduction potential and increased arm‐raising performance, compared to humans. Here, we present the first musculoskeletal model of a western lowland gorilla shoulder to test some of these long‐standing proposals. Estimates of moment arms and moments of the glenohumeral abductors (deltoid, supraspinatus and infraspinatus muscles) over arm abduction were conducted for the gorilla model and a previously published human shoulder model. Contrary to previous assumptions, we found that overall glenohumeral abduction potential is similar between Gorilla and Homo. However, gorillas differ by maintaining high abduction moment capacity with the arm raised above horizontal. This difference is linked to a disparity in soft tissue properties, indicating that scapular morphological features like a cranially oriented scapular spine and glenoid do not enhance the abductor function of the gorilla glenohumeral muscles. A functional enhancement due to differences in skeletal morphology was only demonstrated in the gorilla supraspinatus muscle. Contrary to earlier ideas linking a more obliquely oriented scapular spine to greater supraspinatus leverage, our results suggest that increased lateral projection of the greater tubercle of the humerus accounts for the greater biomechanical performance in Gorilla. This study enhances our understanding of the evolution of gorilla locomotion, as well as providing greater insight into the general interaction between anatomy, function and locomotor biomechanics.

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Section: Discussionmentioning

confidence: 99%

Exploring the functional morphology of the Gorilla shoulder through musculoskeletal modelling

et al. 2021

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“…The shoulder joint complex has an unstable bony configuration secured by connective tissues and dynamic stabilizers (rotator cuff muscles) controlled by a sophisticated neuromuscular system 156; 160 . As a consequence, shoulder structures, particularly rotator cuff (RC) tendons, are prone to various injuries and degenerative disorders 19; 120 . RC tendon tears are common in the general population 103; 122 and can lead to shoulder pain, impaired functional capacities, and reduced quality of life 87; 163 .…”

Section: Introductionmentioning

confidence: 99%

The role of the peripheral and central nervous systems in rotator cuff disease

Bachasson

Singh

Shah

et al. 2015

Journal of Shoulder and Elbow Surgery

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Rotator cuff (RC) disease is an extremely common condition associated with shoulder pain, reduced functional capacities and impaired quality of life. It primarily involves alterations in tendon health and mechanical properties that can ultimately lead to tendon failure. RC tendon tears induce progressive muscular changes that negatively impact surgical reparability of the RC tendons and clinical outcomes. At the same time, a significant base of clinical data suggests a relatively weak relationship between RC integrity and clinical presentation, emphasizing the multifactorial aspects of RC disease. This review aims to summarize the potential contribution of peripheral, spinal and supraspinal neural factors that may: (i) exacerbate structural and functional muscle changes induced by tendon tear, (ii) compromise the reversal of these changes during surgery and rehabilitation, (iii) contribute to pain generation and persistence of pain, iv) impair shoulder function through reduced proprioception, kinematics and muscle recruitment, and iv) help to explain interindividual differences and response to treatment. Given the current clinical and scientific interest in peripheral nerve injury in the context of RC disease and surgery, we carefully reviewed this body of literature with a particular emphasis for suprascapular neuropathy that has generated a large number of studies in the past decade. Within this process, we highlight the gaps in current knowledge and suggest research avenues for scientists and clinicians.

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“…RC tendon tears occur in more than half of the population over the age of 60. Shoulder pain is one of the most common musculoskeletal complaints, and shoulder impingement syndrome is the most commonly diagnosed shoulder disease [7][8][9][10][11]. The etiology of RC tears is multifactorial [7][8][9][10][11].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the relationship between subacromial space volume and rotator cuff injury by Magnetic Resonance Imaging with SPACE technique

Bulut

Sakçı

2021

J CLIN MED KAZ

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To investigate the relationship between the degree of tearing in the rotator cuff tendons and the subacromial region volume using the proton-density weighted Sampling Perfection with Application optimized Contrasts using different flip angle Evolution technique and the contribution of this technique to shoulder magnetic resonance imaging.Material and methods: A total of 125 patients who underwent shoulder magnetic resonance imaging for shoulder pain between January 2016 and December 2016 were included in this single-center, retrospective study. Rotator cuff tendon injury grading was performed using coronal plane 2D short tau inversion recovery T2-weighted sequences (grades 1-4). Subacromial region volume was calculated from PD-weighted 3D SPACE sequence images in sagittal oblique plane. The relationship between rotator cuff tears and subacromial region volumes was evaluated using Pearson's correlation analysis. The measurements were made at different times by two independent radiologists.Results: There was a strong negative correlation between the grade of RC tendon tear and subacromial volume (p<0.05; r: -0.83).Discussion and conclusion: Shoulder magnetic resonance imaging with high-contrast resolution can be obtained by the Sampling Perfection with Application optimized Contrasts using different flip angle Evolution technique. The degree of rotator cuff tendon tear, which is a cause of shoulder pain, is associated with the subacromial region volume. Using the Sampling Perfection with Application optimized Contrasts using different flip angle Evolution technique can also easily reveal the cause of the damage.

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Human evolution and tears of the rotator cuff

Cited by 13 publications

References 22 publications

Exploring the functional morphology of the Gorilla shoulder through musculoskeletal modelling

Exploring the functional morphology of the Gorilla shoulder through musculoskeletal modelling

The role of the peripheral and central nervous systems in rotator cuff disease

Evaluation of the relationship between subacromial space volume and rotator cuff injury by Magnetic Resonance Imaging with SPACE technique

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