tongue

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TONGUE:

TONGUE Muscular organ in floor of mouth Voluntary skeletal muscle Fxn. - Taste Speech Mastication Degluttition Parts – Oral Pharyngeal Sulcus terminalis

EXTERNAL FEATURES:

EXTERNAL FEATURES Root Tip Body - Dorsum Oral , Pharyngeal Foramen caecum Inferior surface

PAPILLARY OR ORAL PART:

PAPILLARY OR ORAL PART Location -mouth floor Margins Foliate papillae Superior surface Inferior surface – Muc. Memb. Frenulum linguae, lingual veins, plica fimbriata

PHARYNGEAL OR LYMPHOID PART:

PHARYNGEAL OR LYMPHOID PART Location Post. Surface/base of tongue Lingual tonsil Posteriormost part -3 folds Muc.Memb Vallecula Lat. Folds separate vallecula from piriform fossa

PAPILLAE:

PAPILLAE Projections of mucous membrane, Roughness Types - Circumvallate- Large ,1-2mm.,8-12 Cylindrical, circular sulcus, Ant. to Sulcus Terminalis Fungiform - tip & margins, pedicle round head ,bright red Filiform –conical, presulcal, velvety ,smallest, numerous.

MUSCLES OF THE TONGUE:

MUSCLES OF THE TONGUE 2 GROUPS INTRINSIC MUSCLES EXTRINSIC MUSCLES

INTRINSIC MUSCLES:

INTRINSIC MUSCLES Present within the substance of tongue Longitudinal muscles- superior & inferior Transverse Vertical They change the shape of the tongue in various stages of degluttition

EXTRINSIC MUSCLES:

EXTRINSIC MUSCLES GENIOGLOSSUS HYOGLOSSUS STYLOGLOSSUS PALATOGLOSSUS CHONDROGLOSSUS

FUNCTION OF EXTRINSIC MUSCLES :

FUNCTION OF EXTRINSIC MUSCLES Genioglossus - protrusion of tongue apex from the mouth Hyoglossus -depresses the tongue Styloglossus - elevates and retracts the tongue Palatoglossus - elevates and retracts the tongue

BLOOD SUPPLY:

BLOOD SUPPLY

NERVE SUPPLY :

NERVE SUPPLY

NERVE SUPPLY:

NERVE SUPPLY Part of tongue Nerve supply Gen Sensation Special Sensation(Taste) Anterior 2/3 rd Lingual Chorda tympani nerve (except cv papillae) Posterior 1/3 rd Glossopharyngeal Glossopharyngeal ( incl cv papillae) Posterior most Internal laryngeal Internal laryngeal MOTOR - All muscles by hypoglossal nerve EXCEPT palatoglossus → cranial part of accessory nerve through pharyngeal plexus

LYMPHATICS:

LYMPHATICS Tip - B/L ,Submental Ant. 2/3 rd Margins: U/L, Submandibular Central part: B/L Jugulo omohyoid Post. 1/3 rd - B/L, Jugulo digastric

APPLIED ANATOMY :

APPLIED ANATOMY 12 th nerve injury Glossitis Swelling of tongue Jaundice Unconscious Tongue bite Carcinoma

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