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Anatomy of Submental and Submandibular Triangles

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Which of the following structures forms the lateral boundary of the submental triangle?

Anterior bellies of the digastric muscle

Which triangle's floor is formed by the prevertebral fascia and the lateral wall of the pharynx?

Carotid triangle

Which nerve is contained within the submandibular triangle?

Lingual nerve

What muscle forms the inferior boundary of the submental triangle?

Body of the hyoid bone

Which of the following structures is NOT contained within the carotid triangle?

Submandibular ganglion

What structure forms the medial boundary of the muscular triangle?

Midline of the neck

Which muscle is located in the submental triangle?


Which nerve supplies the muscles of the tongue?

Hypoglossal nerve

Which triangle is bounded by the sternocleidomastoid muscle, the superior belly of the omohyoid muscle, and the midline of the neck?

Muscular triangle

Which ganglion of the cervical sympathetic trunk is situated at the level of the transverse processes of the C6 vertebra?

Middle cervical ganglion

Which structure hooks around the external carotid artery to lie on the hyoglossus muscle before entering the tongue?

Lingual artery

Which triangle is bounded by the sternocleidomastoid muscle, the clavicle, and the superior nuchal line of the occipital bone?

Occipital triangle

What structures divide the lateral region of the neck into occipital and supraclavicular triangles?

Sternocleidomastoid and omohyoid muscles

Which nerve emerges above the middle of the posterior border of sternocleidomastoid and crosses the occipital triangle to trapezius?

Accessory nerve

Which muscle forms part of the floor of the occipital triangle in the lateral region of the neck?

Scalenus anterior

What structures form the inferior border of the supraclavicular triangle in the lateral region of the neck?

Middle third of clavicle and subclavian artery

In the sternocleidomastoid region, what structures are covered by skin, superficial fascia, and investing fascia?

Ansa cervicalis and carotid sheath

Which nerve is found in the dissection of the lateral region of the neck along with cutaneous nerves and superficial veins?

Lesser occipital nerve

Which nerve supplies the deep muscles of the neck?

Phrenic nerve

Where does the superior root of the ansa cervicalis originate from?

Cranial nerve C1

Which nerve innervates the mucous membrane of the larynx above the fissure of glottis?

Superior laryngeal nerve

What is the loop formed by joining the superior and inferior roots of the ansa cervicalis called?

Ansa cervicalis loop

Which muscle receives innervation from the accessory nerve?

Sternocleidomastoid muscle

Which nerve descends between the internal carotid artery and jugular vein in the neck?

Vagus nerve

Which lymph nodes receive lymphatic vessels from the head, neck, tongue, and larynx?

Deep lateral cervical lymph nodes

Where does the external jugular vein cross before entering the subclavian vein?

Sternohyoid muscle

Which muscles lie in front of the origin of the cervical plexus?

Levator scapulae and scalenus medius

Which veins form the external jugular vein behind the angle of mandible?

Posterior auricular, posterior branch of retromandibular, and occipital vein

Where do the anterior cervical lymph nodes lie?

In front of the sternocleidomastoid muscle

Which structures does the right lymphatic duct receive lymph from?

Right half of head, neck, thorax, and right upper limb

Learn about the boundaries, contents, and structures that define the submental and submandibular triangles in the neck region. Explore the floor, coverings, and important contents of each triangle.

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