Anatomy of Submental and Submandibular Triangles
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Questions and Answers

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

  • Anterior bellies of the sternocleidomastoid muscle
  • Superior belly of the omohyoid muscle
  • Anterior bellies of the digastric muscle (correct)
  • Posterior bellies of the digastric muscle
  • Which triangle's floor is formed by the prevertebral fascia and the lateral wall of the pharynx?

  • Submandibular triangle
  • Carotid triangle (correct)
  • Muscular triangle
  • Submental triangle
  • Which nerve is contained within the submandibular triangle?

  • Facial nerve
  • Lingual nerve (correct)
  • Hypoglossal nerve
  • Vagus nerve
  • What muscle forms the inferior boundary of the submental triangle?

    <p>Body of the hyoid bone</p> Signup and view all the answers

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

    <p>Submandibular ganglion</p> Signup and view all the answers

    What structure forms the medial boundary of the muscular triangle?

    <p>Midline of the neck</p> Signup and view all the answers

    Which muscle is located in the submental triangle?

    <p>Platysma</p> Signup and view all the answers

    Which nerve supplies the muscles of the tongue?

    <p>Hypoglossal nerve</p> Signup and view all the answers

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

    <p>Muscular triangle</p> Signup and view all the answers

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

    <p>Middle cervical ganglion</p> Signup and view all the answers

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

    <p>Lingual artery</p> Signup and view all the answers

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

    <p>Occipital triangle</p> Signup and view all the answers

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

    <p>Sternocleidomastoid and omohyoid muscles</p> Signup and view all the answers

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

    <p>Accessory nerve</p> Signup and view all the answers

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

    <p>Scalenus anterior</p> Signup and view all the answers

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

    <p>Middle third of clavicle and subclavian artery</p> Signup and view all the answers

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

    <p>Ansa cervicalis and carotid sheath</p> Signup and view all the answers

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

    <p>Lesser occipital nerve</p> Signup and view all the answers

    Which nerve supplies the deep muscles of the neck?

    <p>Phrenic nerve</p> Signup and view all the answers

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

    <p>Cranial nerve C1</p> Signup and view all the answers

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

    <p>Superior laryngeal nerve</p> Signup and view all the answers

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

    <p>Ansa cervicalis loop</p> Signup and view all the answers

    Which muscle receives innervation from the accessory nerve?

    <p>Sternocleidomastoid muscle</p> Signup and view all the answers

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

    <p>Vagus nerve</p> Signup and view all the answers

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

    <p>Deep lateral cervical lymph nodes</p> Signup and view all the answers

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

    <p>Sternohyoid muscle</p> Signup and view all the answers

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

    <p>Levator scapulae and scalenus medius</p> Signup and view all the answers

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

    <p>Posterior auricular, posterior branch of retromandibular, and occipital vein</p> Signup and view all the answers

    Where do the anterior cervical lymph nodes lie?

    <p>In front of the sternocleidomastoid muscle</p> Signup and view all the answers

    Which structures does the right lymphatic duct receive lymph from?

    <p>Right half of head, neck, thorax, and right upper limb</p> Signup and view all the answers

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