Third head of sternocleidomastoid muscle

Sabnis, Anjali; Shaikh, Shaguphta T.; More, Rakhi M.

doi:10.4103/2277-4025.297898

Cited by 5 publications

(3 citation statements)

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“…However, they can be effectively utilized for muscle [1] flap harvests. The presence of an unilateral additional head of sternocleidomastoid on right side (clavicular origin) in male cadaver and unilateral additional head on [3] right side of a female cadaver has been reported. The presence of unilateral two additional bellies on [4] left side of male cadaver have also been reported.…”

Section: Discussionmentioning

confidence: 94%

Morphological Variant of Sternocleidomastoid Muscle a Case Report

simrat,

kaur,

Kalyan

et al. 2024

GMCP

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Section: Discussionmentioning

confidence: 94%

Morphological Variant of Sternocleidomastoid Muscle a Case Report

simrat,

kaur,

Kalyan

et al. 2024

GMCP

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“…As a result of the literature review, a total of 40 cases (57 SCM) were reached published in 32 case reports and 2 original studies related to SCM variations (Supplementary Table 10, Supplemental Digital Content 10, http://links.lww.com/SCS/E795). 5–7,10,14,16–44 In 40 cases, variations were detected using different methods such as dissection, surgery, magnetic resonance imaging, and ultrasonography. Distribution order of SCM types in the literature (40 subjects, 57 sides), from largest to smallest, was reported as Type 2a (35 sides)>Type 4 (9 sides)>Type 2b (4 sides)>Type 3 (3 sides)>Type 6 (2 sides)>Type 2c (1 side)=Type 2d (1 side)=Type 2e (1 side)=Type 5 (1 side) (Supplementary Table 10, Supplemental Digital Content 10, Supplemental Digital Content 10, http://links.lww.com/SCS/E795).…”

Section: Discussionmentioning

confidence: 99%

“…Dupont et al4 detected a variation of SCM that attaches to the mastoid process and the superior nuchal line with 6 different tendons in an 81-year-old male cadaver. Sanis et al37 determined that the fibers of the pars sternalis were divided into 2 parts and terminated in the mastoid process and occipital bone in a 60-year-old female cadaver. In our study, insertion consisting of 2 parts was detected on the right side of a 29-week-old female fetus.…”

Section: Discussionmentioning

confidence: 99%

Sternocleidomastoid Muscle in Fetuses: Classification, Morphometric Analysis, and Clinical Significance

Özdemir

Beğer

Bahşi

2023

Journal of Craniofacial Surgery

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This study aimed to examine variations and morphometric properties of the sternocleidomastoid muscle (SCM) in fetuses in terms of infancy and early childhood surgeries. Materials and Methods: Neck regions of 27 fetuses (mean age: 23.30 ± 3.40 wk, sex: 11 boys and 16 girls) fixed with 10% formalin were dissected bilaterally. Photographs of the dissected fetuses were taken in the standard position. Morphometric measurements, such as length, width, and angle, were performed on the photographs using the ImageJ software. In addition, the origin and insertion of SCM were detected. Taking into account the studies in the literature, a classification consisting of 10 types associated with the origin of SCM was carried out. Results: No statistically significant difference was observed in the parameters in terms of side and sex (P > 0.05), except from the linear distance between the clavicle and motor point where the accessory nerve enters SCM (20.10 ± 3.76 for male, 17.53 ± 4.05 for female, P = 0.022). Two-headed SCM (Type 1) was detected in 42 out of 54 sides. Two-headed clavicular head (Type 2a) was detected on 9 sides, and 3-headed (Type 2b) on 1 side. A 2-headed sternal head (Type 3) was detected on 1 side. A single-headed SCM (Type 5) was also detected on 1 side. Conclusion: Knowledge related to variations of the origin and insertion of fetal SCM may be helpful in preventing complications during treatments of pathologies such as congenital muscular torticollis in early period of life. Moreover, the calculated formulas may be useful to estimate the size of SCM in newborns.

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Pediatric Anatomy of the Sternocleidomastoid Muscle on Magnetic Resonance Imaging Views

Beger,

Yalinkiliç,

Erdem

et al. 2024

Journal of Craniofacial Surgery

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Objective: This study aimed to investigate morphologic features of the sternocleidomastoid muscle (SCM) in children for pediatric head-neck surgeries. Methods: Magnetic resonance imaging images of 84 (46 males/38 females) pediatric patients aged ages 1 to 18 years (mean age: 9.38 ± 4.46 y) constituted the study universe. The size of SCM (including its height, width, and angulation) was measured, and the origin types of SCM were noted. Results: All patients had SCM bilaterally. The origin variation of SCM was observed in 22 sides (13.10%). The authors observed type 1 in 146 sides (86.90%), type 2a in 15 sides (8.90%), type 3 in 2 sides (1.20%), type 4 in 1 side (0.60%), and type 5 in 4 sides (2.40%). The absence and presence of SCM variation were not affected by sex (P = 0.370) and side (P = 0.360). All measured parameters were similar in right and left sides, and also in males and females, except from the angle between the junction of the sternal and clavicular heads of SCM. The angle was greater in males than females (P = 0.004). All measured parameters increased with advancing age (between 1 and 18 y; P < 0.05). Conclusion: The authors’ SCM-related data may be useful for clinicians to estimate the size origin variations of SCM in children.

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Third head of sternocleidomastoid muscle

Cited by 5 publications

References 0 publications

Morphological Variant of Sternocleidomastoid Muscle a Case Report

Morphological Variant of Sternocleidomastoid Muscle a Case Report

Sternocleidomastoid Muscle in Fetuses: Classification, Morphometric Analysis, and Clinical Significance

Pediatric Anatomy of the Sternocleidomastoid Muscle on Magnetic Resonance Imaging Views

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