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A RARE CASE OF BILATERAL STERNOCLEIDOMASTOID MUSCLE VARIATION
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| Author:
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LAURA TÉLLEZ-, IVÁN ALONSO TIBADUIZA- RODRIGUEZ, HUMBERTO FERREIRA-ARQUEZ
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| Abstract:
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Background: The abnormal origin, presence of additional head and layered arrangement of fibers are the
reported variations of sternocleidomastoid muscle.
Aims: The aim of the present study is report a rare bilateral anatomical variation of the sternocleidomastoid
muscle.
Materials and Methods: The anatomical variations were found during a routine dissection performed in the
laboratory of Morphology of the University of Pamplona.
Findings: In accordance with their origin, insertion, in the right side, in the superficial layer were dissected
muscular bundle considered as sternocleidooccipital and sternomastoid muscle. In the deep layer, muscular
bundles considered as cleidomastoid and sternocleidomastoid muscle was observed. In the left side,
additional head originated from the investing deep layer of cervical fascia in the roof of the lesser
supraclavicular fossa, traversed obliquely downward, backward, fused with clavicular head.
Conclusion: The presence of this anatomical variation it might cause difficulty in assessing the vital
neurovascular structures of the neck.
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| Keyword:
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Anatomical variations, sternocleidooccipital muscle, sternomastoid muscle, cleidomastoid muscle, additional heads.
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| DOI:
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