Muscles of the tongueLingual artery and veinStructures in the floor of the mouthGlossopharyngeal nerveHypoglossal nerve

Kritchai Bespinyowong

Muscles of the tongue

Extrinsic muscles

Intrinsic muscles

Extrinsic muscles of the tongue

Genioglossus muscle

Hyoglossus muscle

Styloglossus muscle

Palatoglossus muscle

Genioglossus muscle

Genioglossus muscle

Genioglossus muscle

Superior fibers Retract tip of tongue

Middle fibers Protrude tip Inferior fibers of tongue

Action

Safety muscle

Genioglossus muscle

Bilateral action Depress center of tongue

Unilateral action Contralateral protrude of tongue

Action

Hyoglossus muscleStyloglossus musclePalatoglossus muscle

Hyoglossus muscle

Action

• Depress side of tongue

• Retract tongue

Styloglossus muscle

Action

• Elevate side of tongue

• Retract tongue

Palatoglossus muscle

Action

• Elevate posterior part of tongue

• ทำ��ให้� Isthmus of fauces แคบลง

Intrinsic muscles of the tongue

Superior longitudinal muscle

Inferior longitudinal muscle

Transverse muscle

Vertical muscle

Intrinsic muscles of the tongue

Intrinsic muscles of the tongue

Nerve supply of muscles of tongue

Hypoglosal nerve

except palatoglossus muscle that supp ly by pharyngeal plexus

Lingual artery

Lingual vein

Venae comitantes

Vena comitans nervi hypoglossi

Structures in the floor of the mouth

Mylohyoid muscle

Geniohyoid muscle

Sublingual salivary gland

Submandibular duct

Submandibular ganglion

Mylohyoid muscle Geniohyoid muscle

Mylohyoid muscle

Action

• Elevate hyoid bone and base of tongue• Elevate floor of mouth• depress mandible

Nerve supply

Mylohyoid nerve

Geniohyoid muscle

Action

• Elevate hyoid bone and tongue

Nerve supply

1C โดยผ่��นม�ทำ�ง hypoglossal nerve

Sublingual salivary gland Submandibular duct

Submandibular ganglion

Glossopharyngeal nerve

Hypoglossal nerve

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