๐๐๐๐๐๐:
โญMuscular organ in the oral cavity.
๐ฐ๐ญ๐ผ๐ต๐ช๐ป๐ฐ๐ถ๐ต:
1) Organ of taste.
2) Helps in –
a) Speech,
b)Mastication,
c)Deglutition
๐ฐ๐ฌ๐ฟ๐ป๐ฌ๐น๐ต๐จ๐ณ ๐ญ๐ฌ๐จ๐ป๐ผ๐น๐ฌ๐บ:
- Root: Attached to the mandible and Hyoid bone by muscle.
- Tip: Anterior free end, comes into contact with the central incisors.
- Body: Body has –
2 surfaces: Dorsal & Ventral surface
2 lateral borders: Right & Left borders
โญ๐๐จ๐ซ๐ฌ๐๐ฅ ๐ฌ๐ฎ๐ซ๐๐๐๐ :
Divided by V shaped sulcus Terminalis into 2 parts-
1) Anterior 2/3rd or Oral Part.
2) Posterior 1/3rd or Pharyngeal Part.
โจFeatures of Oral Part:
- A median furrow (represent the bilateral origin of tongue)
- Large number of Papillae/ Lingual papillae
๐ Papillae of Tongue:
a.Vallate Papillae- arranged in a V shaped row infront of Sulcus Terminalis.
b.Foliate Papillae- near the margin infront of Sulcus Terminalis.
c.Filiform Papillae- present in dorsum of tongue.
d.Fungiforn Papillae- present in apex and margin of the tongue.
โผ๏ธFeatures of Pharyngeal Part:
1.Large number of lymphoid follicle (lingual tonsil)
2.Large number of mucus & serous gland.
โญ ๐๐๐ง๐ญ๐ซ๐๐ฅ S๐ฎ๐ซ๐๐๐๐:
Features of ventral surface:-
1.Frenulum Linguae- Median fold of Mucus Membrane.
2.Deep Lingual Vein- Seen on either side of Frenulum Linguae.
3.Plica Fimbriata- Lateral to the Lingual Vein.
โช ๐ด๐ผ๐บ๐ช๐ณ๐ฌ๐บ ๐ถ๐ญ ๐ป๐ถ๐ต๐ฎ๐ผ๐ฌ:
โก๏ธ ๐๐ง๐ญ๐ซ๐ข๐ง๐ฌ๐ข๐ ๐ฆ๐ฎ๐ฌ๐๐ฅ๐:
1.Superior longitudinal
2.Inferior longitudinal
3.Transverse
4.Vertical
โช๏ธFunction: Alter the shape of the tongue.
โก๏ธ ๐๐ฑ๐ญ๐ซ๐ข๐ง๐ฌ๐ข๐ ๐ฆ๐ฎ๐ฌ๐๐ฅ๐:
1.Genioglossus (Safety muscle of tongue )
2.Hyoglossus
3.Styloglossus
4.Palatoglossus
โช๏ธFunction: Alter the movement of the tongue.
๐ฐ ๐จ๐น๐ป๐ฌ๐น๐ฐ๐จ๐ณ ๐บ๐ผ๐ท๐ท๐ณ๐ ๐ถ๐ญ ๐ป๐ถ๐ต๐ฎ๐ผ๐ฌ:
โซ๏ธLingual artery- Branch of External Carotid Artery.
โซ๏ธAscending Pharyngeal artery- Branch of External Carotid Artery.
โซ๏ธTonsillar artery- Branch of Facial Artery.
๐ฐ ๐ณ๐๐ด๐ท๐ฏ๐จ๐ป๐ฐ๐ช ๐ซ๐น๐จ๐ฐ๐ต๐จ๐ฎ๐ฌ ๐ถ๐ญ ๐ป๐ถ๐ต๐ฎ๐ผ๐ฌ:
โซ๏ธApical group:
โก๏ธ submental lymph node
โซ๏ธMarginal group:
โก๏ธ submandibular lymph node
โซ๏ธCentral group:
โก๏ธ deep cervical lymph node
โซ๏ธBasal group:
โก๏ธ jugulo digastric lymph node
โฝAll of the above drains into
โก๏ธ Jugulo omohyoid lymph node.
๐ฐ ๐ต๐ฌ๐น๐ฝ๐ฌ ๐บ๐ผ๐ท๐ท๐ณ๐:
(With developmental background)
๐ Motor Supply:
๐นAll the muscle supplied by- Hypoglossal nerve (except Palatoglossus,which is supplied by Cranial root of accesory via Pharyngeal plexus)
๐ Sensory Supply:
โจAnterior 2/3 rd –
๐นDevelops from 1st pharyngeal arch,
๐นSupplied by:
1) Lingual nerve (General sensation)
2) Chorda tympani nerve (Special sensation)
โจPosterior 1/3rd-
๐นDevelops from 3rd pharyngeal arch,
๐นSupplied by: Glossopharyngeal nerve.
โจ Posteriormost part:
๐น Develops from 4th pharyngeal arch,
๐นSupplied by: Internal laryngeal nerve.
๐ฐ ๐ณ๐ฐ๐ต๐ฐ๐ต๐ฎ ๐ฌ๐ท๐ฐ๐ป๐ฏ๐ฌ๐ณ๐ฐ๐ผ๐ด ๐ถ๐ญ ๐ป๐ถ๐ต๐ฎ๐ผ๐ฌ:
๐ Non-keratinized Stratified Squamous Epithelium.
Tanzina Shahrin Faiza/ Central Medical College
Session: 2018 – 19
Platform Academia/ Sadia Afrin Ivy