Classification of unusual insertion of the pectoralis minor muscle

Lee, Kang Woo; Choi, You–Jin; Lee, Hyung‐Jin; Gil, Young Chun; Kim, Hee Jin; Tansatit, Tanvaa

doi:10.1007/s00276-018-2107-0

Cited by 14 publications

(18 citation statements)

References 11 publications

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“…89,91,94 The PM muscle originates from the costal cartilage margin of the third through fifth ribs and inserts onto the superomedial aspect of the coracoid, functioning as a dynamic stabilizer of the scapula (Figure 3). 13,61,108 PM abnormalities cause altered scapular kinematics, particularly during J o u r n a l P r e -p r o o f repetitive movements with scapular protraction. 14 Repetitive movement in forward and downward directions potentiates adaptive changes in the PM in response to scapular dyskinesis.…”

Section: Thoracic Outlet Anatomy and Biomechanicsmentioning

confidence: 99%

Pectoralis minor syndrome – review of pathoanatomy, diagnosis, and management of the primary cause of neurogenic thoracic outlet syndrome

Ahmed

Graf

Karzon

et al. 2022

JSES Reviews, Reports, and Techniques

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Section: Thoracic Outlet Anatomy and Biomechanicsmentioning

confidence: 99%

Pectoralis minor syndrome – review of pathoanatomy, diagnosis, and management of the primary cause of neurogenic thoracic outlet syndrome

Ahmed

Graf

Karzon

et al. 2022

JSES Reviews, Reports, and Techniques

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“…The pectoralis minor (PMi) is a triangular muscle in the upper part of the chest and beneath the pectoralis major muscle. The PMi generally originates from the third, fourth, and fifth ribs and inserts into the medial and superior margins of the anterior portion of the scapula coracoid process (Lee et al, 2018). The PMi function affects scapular movement (Borstad, 2006;Borstad and Ludewig, 2005) and the increase in PMi stiffness might cause abnormal One muscle mechanical response to stretching is an acute change in the muscle mechanical properties during lengthening, which is an attractive topic in muscle biomechanics research and rehabilitation settings.…”

Section: Introductionmentioning

confidence: 99%

Acute and Prolonged Effects of Stretching on Shear Modulus of the Pectoralis Minor Muscle

Umehara¹,

Nakamura²,

Saeki³

et al. 2021

jsportscimed

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Increased muscle stiffness of the pectoralis minor (PMi) could deteriorate shoulder function. Stretching is useful for maintaining and improving muscle stiffness in rehabilitation and sport practice. However, the acute and prolonged effect of stretching on the PMi muscle stiffness is unclear due to limited methodology for assessing individual muscle stiffness. Using shear wave elastography, we explored the responses of shear modulus to stretching in the PMi over time. The first experiment (n = 20) aimed to clarify the acute change in the shear modulus during stretching. The shear modulus was measured at intervals of 30 s × 10 sets. The second experiment (n = 16) aimed to observe and compare the prolonged effect of different durations of stretching on the shear modulus. Short and long stretching duration groups underwent 30s × 1 set and 30s × 10 sets, respectively. The assessments of shear modulus were conducted before, immediately after, and at 5, 10, and 15 min post-stretching. In experiment I, the shear modulus decreased immediately after a bout (30 s) of stretching (p < 0.001, change: -2.3 kPa, effect size: r = 0.72) and further decreased after 3 repetitions (i.e., 90 s) of stretching (p = 0.03, change: -1.0 kPa, effect size: r = 0.53). In experiment II, the change in the shear modulus after stretching was greater in the long duration group than in the short duration group (p = 0.013, group mean difference: -2.5 kPa, partial η2 = 0.36). The shear modulus of PMi decreased immediately after stretching, and stretching for a long duration was promising to maintain the decreased shear modulus. The acute and prolonged effects on the PMi shear modulus provide information relevant to minimum and persistent stretching time in rehabilitation and sport practice.

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“…The anomalous tendon of PMi carved a groove on the coracoid process, blending in with Supraspinatus in a fibrous capsule, according to Wood [9]. The PMi tendon crossed the root of the coracoid process and looped downwards and outwards to insert into the shoulder capsule, according to Macalister [17]. The early observations about the insertion of the pectoralis minor were mentioned in Testut's treatises [4,21].…”

Section: Discussionmentioning

confidence: 99%

“…Thirty-three studies were collected, and only fifteen literatures dealt with the prevalence of ectopic insertion of PMi. Therefore, fifteen studies were found suitable for data extraction [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The pooled estimation was done through Prometa 3 software after data extraction.…”

Section: Generation Of Abstractmentioning

confidence: 99%

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pooled prevalence estimation of anomalous insertion of pectoralis minor in cadaveric studies

Akhtar

Fatima²,

Rahman

et al. 2022

ijhs

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Introduction: The pectoralis minor muscle originates in the chest wall's third to fifth ribs and inserts on the medial side of the Scapula's coracoid process. It aids in scapulothoracic joint abduction and shoulder downward movement. Since the 19th century, the aberrant insertion of the pectoralis minor beyond the coracoid process has been known. Aim of the study: To measure its pooled prevalence in different populations. Methods: The keywords were generated from MeSH term database. The keywords were combined with the operator to form search strategies. Three significant databases PubMed, Embase, and Google Scholar were used. The data extraction was done from cadaveric studies. Results: The prevalence of anomalous insertion of pectoralis minor was reported to be 1.5-34% (per hundred shoulders in cadaveric dissection in exiting literatures, but its pooled prevalence was 22% (16-31%) (Per hundred shoulders). According to Le Double's classification, there were three sorts of variations of aberrant tendon insertion. In the literature, the Coracohumeral ligament and the Supraspinatus are two more common locations for the implantation of aberrant tendons. Conclusion: During rotator cuff surgeries, surgeons should be cautious about the pectoralis minor tendon in the rotator interval.

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Classification of unusual insertion of the pectoralis minor muscle

Cited by 14 publications

References 11 publications

Pectoralis minor syndrome – review of pathoanatomy, diagnosis, and management of the primary cause of neurogenic thoracic outlet syndrome

Pectoralis minor syndrome – review of pathoanatomy, diagnosis, and management of the primary cause of neurogenic thoracic outlet syndrome

Acute and Prolonged Effects of Stretching on Shear Modulus of the Pectoralis Minor Muscle

pooled prevalence estimation of anomalous insertion of pectoralis minor in cadaveric studies

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