1 / 13

Tongue

Tongue. External features- Root Tip Body- dorsum or superior surface & inferior surface Root-attached to the mandible & soft palate above and to the hyoid bone below. Tip- anterior free end & lies behind the upper incisor teeth.

hinto
Télécharger la présentation

Tongue

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Tongue External features- • Root • Tip • Body- dorsum or superior surface & inferior surface Root-attached to the mandible & soft palate above and to the hyoid bone below. Tip- anterior free end & lies behind the upper incisor teeth. Dorsum-oral part or ant 2/3rd & pharyngeal part or post 1/3rd part, V shaped groove- suclus terminalis, median pit- foramen caecum. Oral part or papillary part of the tongue- foliate papillae 4 to 5 vertical folds in front of the palatoglossal arch, rough superior surface and covered with papillae, inferior surface smooth mucous membrane which shows the median fold- frenulum lingulae, plica fimbriata Pharyngeal part or lymphoid part of the tongue- lies behind the palatoglossal arches and the sulcus terminalis. It forms the base of the tongue forming the anterior wall of the oropharynx. Devoid of the papillae & has many lymphoid follicles. Lingual tonsil & mucous gland are also present. Posterior most part- connected to epiglottis by 3folds of mucous membrane- median glossoepiglottic fold, rt and lt glossoepiglottic folds. Vallecula

  2. Tongue

  3. Tongue

  4. Tongue Papillae of the tongue • Vallate or circumvallate papillae- 1-2 mm in diameter & 8-12in number • Fungiform papillae- numerous near the tip & margins of the tongue • Filiform papillae or conical papillae- presulcal area of the dorsum of the tongue and gives the velvety appearance

  5. Tongue

  6. Tongue Muscles of the tongue- Intrinsic muscles- • Superior longitudinal • Inferior longitudinal • Transverse • Vertical

  7. Tongue

  8. Tongue Extrinsic muscles- • Genioglossus • Hyoglossus • Styloglossus • palatoglossus

  9. Tongue

  10. Tongue Arterial supply- • Lingual artery • Root of tongue is supplied by the tonsillar & ascending pharyngeal arteries Venous drainage- Deep lingual vein- lingual vein- CFV or IJV

  11. Tongue Lymphatic drainage- • Tip of the tongue-submental lymph nodes • Rt and lt halves of the remaining ant 2/3rd- submandibular nodes • Posterior 1/3rd- bilaterally- jugulo-omohyoid nodes and these are know as the lymph nodes of the tongue

  12. Tongue Nerve supply- Motor nerves- all the intrinsic & extrinsic muscles expect the palatoglossus are supplied by the hypoglossal nerve. Palatoglossus supplied by the cranial part of the accessory nerve through pharyngeal plexus Sensory nerves- Lingual nerve for general sensation and chorda tympani for the taste of ant 2/3rd of the tongue except vallate papillae. Glossopharyngeal nerve is both general sensory and taste for the post 1/3rd of the tongue including circumvallate papillae Posteriormost part of the tongue is supplied by the vagus nerve through the internal laryngeal nerve.

  13. Tongue

More Related