510-7 Flashcards
What is the anatomical boundary separating the body of the tongue and the root of the tongue?
The Sulcus Terminalis (V shape behind the C.VallateP. & foramen cecum)
Which embryonic pharyngeal arch was the precursor for the body of the tongue?
1st Arch (tuberculum impar)
Which embryonic pharyngeal pouch lead to the root of the tongue (and the CVallateP)?
3rd Arch (copula)
Which nerve controls the motor functions of the tongue?
XII-Hypoglossal Nerve
What separates an intrinsic tongue muscle from an extrinsic muscle?
Ex:one attachment outside of tongue In:Entirely within the tongue
What types of oral mucosa line the tongue? Ventral? Dorsal? What are the subcategories of specialized mucosa?
Ventral-lining oral mucosa (nonker st. sq. epi) Dorsal-Specialized oral mucosa(regionally ker. st. sq. epi) WITH papillae, taste buds, & glands (both serous & mucous)
Describe the four types of papillae on the dorsal side of the tongue.
1) CircumVallatePapillae-7 to 12 LARGE papillae 2)Foliate-leaf like parallel ridges on the lateral edge 3)Fungiform-mushroom shaped small RED DOTS when vascularized in a live human 4)Filliform-smallest, most numerous NO taste buds highly keratinized epi.
What causes geographic tongue?
Regional loss of papillae. Vit B deficiency, alcohol, spicy food…
Which papillae give traction and point back (think cats)?
Thats the most abundant filliform papillae
Which serous gland clears the taste buds of CVallateP?
Ebners’!!
What is hairy tongue?
The accumulation of keratinized tissue. You can trim it off!!
Do foliate papillae have Von Ebner’s glands? Taste buds?
Foliate papillae on the side of the tongue do indeed have Von Ebner’s glands and taste buds
What three nerves are associated with taste? (I’ve seen these before)
VII-Facial, IX-Glossopharyngeal, X-vagus
What feature can be found on the columnar taste bud cells?
Microvilli
Which four nerves innnervate the tongue. What regions?
V-Trigeminal BODY of tongue (not taste remember :) TASTE on the BODY of the tongue is VII-Facial. IX-Glossopharyngeal and X-Vagus innervate the ROOT of the tongue sensory and taste.
