16: Larynx

CHAPTER 16

LARYNX

Overview and Topographic Anatomy

Cartilages

Membranes and Ligaments

Muscles

Vascular Supply

Nerve Supply

Clinical Correlates

Questions

Overview and Topographic Anatomy

GENERAL INFORMATION

Larynx: connection between the pharynx and the trachea

Prevents foreign bodies from entering the airways

Designed for the production of sound (phonation)

Shorter in women and children

Formed by 9 cartilages: 3 paired and 3 unpaired

Located in the midline opposite the 3rd to the 6th cervical vertebrae

Regions of the larynx:

Vestibule

Ventricle

Infraglottic

Relations of the Larynx

Anterolateral—infrahyoid muscles, platysma

Lateral—lobes of the thyroid gland, carotid sheath

Posterior—it forms the anterior wall of the laryngopharynx

Superior—base of tongue and vallecula

Inferior—trachea

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Cartilages

GENERAL INFORMATION

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THYROID CARTILAGE

Anatomic Feature

Comments

2 lateral laminae

2 plates that meet at an acute angle in the anterior midline

Laryngeal prominence

Also known as the Adam’s apple

Formed by the fusion of the 2 lateral lamina

Larger in males than in females

Thyroid notch

Superior portion of the laryngeal prominence, which forms a V shape

Superior tubercle

Superior border of the oblique line

Oblique line

Attachment for sternothyroid, thyrohyoid, and inferior constrictor mm. (extrinsic muscles of the larynx)

Inferior tubercle

Inferior border of the oblique line

Superior horn

Provides lateralmost attachment for the thyrohyoid membrane

Inferior horn

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Jan 5, 2015 | Posted by in General Dentistry | Comments Off on 16: Larynx
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