Sample Chapter 10 from the Textbook (35559.0K) - McGraw-Hill
Sample Chapter 10 from the Textbook (35559.0K) - McGraw-Hill
Sample Chapter 10 from the Textbook (35559.0K) - McGraw-Hill
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326 PART 2 Support and Movement<br />
Table <strong>10</strong>.7 Muscles of Swallowing and <strong>the</strong> Larynx (see figures <strong>10</strong>.11 and <strong>10</strong>.12)<br />
Muscle Origin Insertion Nerve Action<br />
Larynx<br />
Arytenoids (ar-i-tē′noydz)<br />
Oblique (not illustrated) Arytenoid cartilage Opposite arytenoid cartilage Recurrent laryngeal Narrows opening to larynx<br />
Transverse<br />
(not illustrated)<br />
Arytenoid cartilage Opposite arytenoid cartilage Recurrent laryngeal Narrows opening to larynx<br />
Cricoarytenoids (krī ′kō-ar-i-tē′noydz)<br />
Lateral (not illustrated) Lateral side of cricoid cartilage Arytenoid cartilage Recurrent laryngeal Narrows opening to larynx<br />
Posterior (not illustrated)<br />
Cricothyroid<br />
(krī -kō-thī ′royd)<br />
Thyroarytenoid<br />
(thī ′rō-ar′i-tē′noyd;<br />
not illustrated)<br />
Vocalis<br />
(vō-kal′ ĭs; not illustrated)<br />
Soft Palate<br />
Levator veli palatini<br />
(lē-vā′tor, le-vā′ter<br />
vel′ī pal′ă-tē′nī )<br />
Palatoglossus<br />
(pal-ă-tō-glos’ŭs)<br />
Palatopharyngeus<br />
(pal′ă-tō-far-in-jē′ŭs)<br />
Tensor veli palatini<br />
(ten′sōr vel′ī pal′ă-tē′nī )<br />
Posterior side of cricoid<br />
cartilage<br />
Arytenoid cartilage Recurrent laryngeal Widens opening of larynx<br />
Anterior cricoid cartilage Thyroid cartilage Superior laryngeal Leng<strong>the</strong>ns (tenses) vocal cords<br />
Thyroid cartilage Arytenoid cartilage Recurrent laryngeal Shortens (relaxes) vocal cords<br />
Thyroid cartilage Arytenoid cartilage Recurrent laryngeal Shortens (relaxes) vocal cords<br />
Temporal bone and<br />
pharyngotympanic<br />
Soft palate Pharyngeal plexus Elevates soft palate<br />
Soft palate Tongue Pharyngeal plexus Narrows fauces; elevates<br />
posterior tongue<br />
Soft palate Pharynx Pharyngeal plexus Narrows fauces; depresses<br />
palate; elevates pharynx<br />
Sphenoid and<br />
auditory tube<br />
Soft palate division<br />
of auditory tube<br />
Mandibular, division<br />
of trigeminal<br />
Tenses soft palate; opens<br />
auditory tube<br />
Uvulae (ū ′vū -lē) Posterior nasal spine Uvula Pharyngeal plexus Elevates uvula<br />
Pharynx<br />
Pharyngeal constrictors (fă-rin′jē-ăl)<br />
Inferior Thyroid and cricoid cartilages Pharyngeal raphe Pharyngeal plexus<br />
and external<br />
laryngeal nerve<br />
Narrows inferior portion of<br />
pharynx in swallowing<br />
Middle Stylohyoid ligament and hyoid Pharyngeal raphe Pharyngeal plexus Narrows pharynx in swallowing<br />
Superior<br />
Salpingopharyngeus<br />
(sal-ping′gō-far-in-jē′ŭs)<br />
Stylopharyngeus<br />
(stī ′lō-far-in-jē′ŭs)<br />
Medial pterygoid plate,<br />
mandible, floor of mouth,<br />
and side of tongue<br />
Pharyngeal raphe Pharyngeal plexus Narrows superior portion of<br />
pharynx in swallowing<br />
Auditory tube Pharynx Pharyngeal plexus Elevates pharynx; opens<br />
auditory tube in swallowing<br />
Styloid process Pharynx Glossopharyngeus Elevates pharynx<br />
<strong>10</strong>.3 Trunk Muscles<br />
Learning Outcomes<br />
After reading this section, you should be able to<br />
A. Describe <strong>the</strong> muscles of <strong>the</strong> vertebral column and <strong>the</strong><br />
actions <strong>the</strong>y accomplish.<br />
B. List <strong>the</strong> muscles of <strong>the</strong> thorax and give each of <strong>the</strong>ir actions.<br />
C. Describe <strong>the</strong> muscles of <strong>the</strong> abdominal wall and explain<br />
<strong>the</strong>ir actions.<br />
D. List and describe <strong>the</strong> muscles of <strong>the</strong> pelvic floor and<br />
perineum.
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