Specialized Mucosa of the Tongue By Karen Haldemann RDH, BSDH This is the third and final classification of oral mucous membranes

Learning Objectives Identify the four types of lingual papillae, location, characteristics, and function Explain the function of a taste bud Describe how taste sensation is communicated to the brain Identify the Glands of von Ebner and location Explain the function of the Glands of von Ebner and how taste sensation is improved Review learning objectives for this topic

Lingual Papillae Lingual papillae, Miley loves to show hers off. https://heightline.com/miley-cyrus-tattoos-tongue-teeth/

Lingual Papillae Specialized mucosa Located on Lateral and dorsal surfaces of the tongue Small appendages of keratinized epithelium Lingual papillae…what are they and where are they found?

Four Types of Lingual Papillae How many types of lingual papillae are there? https://www.pinterest.com/pin/363736107383937561/

Four Types of Lingual Papillae Filiform *Fungiform *Foliate *Circumvallate *These three are associated with taste sensation The four types of lingual papillae are not all associated with taste – only three of the four are

Taste Sensation Taste receptors stimulated upon contact with food Taste cells and sensory neurons in taste buds receive messages from taste receptors What is taste sensation? How do we taste something?

Taste Sensation Sensory neurons send messages to central nervous system tell brain to taste Brain identifies certain types of taste To tie in from a few weeks ago, sensory neurons send messages to the central nervous system. The CNS tells our brain to taste and specifically certain types of taste

Taste Bud - specialized epithelial cell As we just learned, not all lingual papillae are associated with taste…so what exactly is a taste bud?

Filiform Papillae Most numerous of the lingual papillae Location: Dorsal surface of the body of the tongue Scattered Identify four types of lingual papillae, location, characteristics, and function. Let’s start with filiform papillae location https://www.semanticscholar.org/paper/Smell-and-taste-disorders.-Wrobel-Leopold/351e5a32bddc9a3b7d2a2cf939a4d932b69611c0/figure/7

Filiform Papillae Hair-like projections Look like Christmas trees under magnification Velvety texture Characteristics of filiform papillae. Magnified image to show “Christmas tree” appearance

Filiform Papillae *NO TASTE BUDS* Function is mechanical Guide food to back of pharynx for swallowing Function of filiform papillae

Fungiform Papillae Less numerous than filiform papillae Location: dorsal surface of the body of the tongue Appear as small red dots Fungiform papillae location, characteristics

Fungiform Papillae What do fungiform papillae look like? http://digikalla.info/fungiform-papillae/fungiform-papillae-pigmentation-of-the-fungiform-papillae-of-the-tongue-a-report-of/ https://www.semanticscholar.org/paper/Smell-and-taste-disorders.-Wrobel-Leopold/351e5a32bddc9a3b7d2a2cf939a4d932b69611c0/figure/7

Fungiform Papillae Slightly raised Mushroom-shaped Functions is taste Fungiform papillae characteristics. What one looks like under magnification

Fungiform and Filiform Papillae Magnified image of fungiform and filiform papillae next to one another

Foliate Papillae Location: Most posterior part of the lateral surfaces of the tongue Appear as vertical ridges parallel to on another Location of Foliate papillae and characteristics

Foliate Papillae What healthy foliate papillae look like http://screening.iarc.fr/atlasoralglossdef.php?lang=1&key=foliate%20papillae&img http://homesonthenet.info/asninfo-normal-tongue-side.html

Foliate Papillae Leaf-shaped Function is taste Under magnification. What is the function of foliate papillae?

Circumvallate Papillae Pronounced: serk – um – val – ate Located: Posterior part of dorsal surface of the tongue facing the pharynx Function is taste bitter Review circumvallate papillae pronunciation. Location and function

Circumvallate Papillae Appear in a V-shaped row Very large Raised Mushroom-shaped Describe appearance of circumvallate papillae

Circumvallate Papillae Remember this image from your VAS lessons during the first week of the semester?

Circumvallate Papillae *Glands of von Ebner Located: bottom trenches of circumvallate papillae Minor salivary glands Secrete serous fluid Glands of von Ebner are special structures associated with circumvallate papillae. Location and function

Circumvallate Papillae *Glands of von Ebner Serous fluid cleanses trenches of bitter substances after taste buds have been stimulated How taste sensation is improved from the Glands of von Ebner

Glands of von Ebner A. Circumvallate papilla B. Gland of von Ebner C. Trench D. Taste bud Cross section, magnified Glands of von Ebner in anatomical relation to circumvallate papillae and taste bud

You Should Now Feel Confident to: Identify the four types of lingual papillae, location, characteristics, and function Explain the function of a taste bud Describe how taste sensation is communicated to the brain Identify the Glands of von Ebner and location Explain the function of the Glands of von Ebner and how taste sensation is improved Review learning objectives for this topic

Resources http://digikalla.info/fungiform-papillae/fungiform-papillae-pigmentation-of-the-fungiform-papillae-of-the-tongue-a-report-of/ Fehrenbach, M. J., & Popowics, T. (2015). Illustrated dental embryology, histology, and anatomy (4th ed.) Maryland Heights, MO: Saunders of Elsevier, Inc. ISBN: 978-1-4557-7685-6 https://heightline.com/miley-cyrus-tattoos-tongue-teeth/ http://homesonthenet.info/asninfo-normal-tongue-side.html/ https://www.pinterest.com/pin/363736107383937561/ http://screening.iarc.fr/atlasoralglossdef.php?lang=1&key=foliate%20papillae&img/ https://www.semanticscholar.org/paper/Smell-and-taste-disorders.-Wrobel-Leopold/351e5a32bddc9a3b7d2a2cf939a4d932b69611c0/figure/7 THE END