The muscular triangle is the lowest part of the anterior triangle, bounded by the midline of the neck, the superior belly of omohyoid and the lower anterior border of sternocleidomastoid. It is named for the infrahyoid strap muscles that fill it, which overlie the thyroid gland, larynx and trachea.
| Location | Lower front of the neck, beside the midline. |
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Contains the infrahyoid muscles and covers the thyroid and airway.
Thyroid surgery and tracheostomy are performed through the muscular triangle, with the strap muscles separated or divided to reach the thyroid. The recurrent laryngeal nerves lie deep in this region and must be protected.
Enlargement of the thyroid deep to the strap muscles, producing a lump in the muscular triangle that moves on swallowing.
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