Lingual artery and vein Structures in the floor of the mouth Muscles of the tongue Lingual artery and vein Structures in the floor of the mouth Glossopharyngeal nerve Hypoglossal 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 Action Superior fibers Retract tip of tongue Middle fibers Protrude tip Inferior fibers of tongue Safety muscle

Genioglossus muscle Action Bilateral action Depress center of tongue Unilateral action Contralateral protrude of tongue

Hyoglossus muscle Styloglossus muscle Palatoglossus 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 ทำให้ 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 supply 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 C1 โดยผ่านมาทาง hypoglossal nerve

Sublingual salivary gland Submandibular duct

Submandibular ganglion

Glossopharyngeal nerve

Hypoglossal nerve

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