Muscles of the tongue

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Muscles of the tongue Lingual artery and
vein Structures in the floor of the
mouth Glossopharyngeal nerve Hypoglossal nerve
Kritchai Bespinyowong
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Muscles of the tongue
Extrinsic muscles Intrinsic muscles
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Extrinsic muscles of the tongue
Genioglossus muscle Hyoglossus
muscle Styloglossus muscle Palatoglossus muscle
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Genioglossus muscle
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Genioglossus muscle
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Genioglossus muscle
Action
Superior fibers Retract tip of
tongue Middle fibers Protrude tip
Inferior fibers of tongue
Safety muscle
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Genioglossus muscle
Action
Bilateral action Depress center of
tongue Unilateral action Contralateral
protrude of tongue
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Hyoglossus muscle Styloglossus muscle Palatoglossu
s muscle
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Hyoglossus muscle
Action

• Depress side of tongue
• Retract tongue

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Styloglossus muscle
Action

• Elevate side of tongue
• Retract tongue

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Palatoglossus muscle
Action

• Elevate posterior part of tongue
• ????? Isthmus of fauces ?????

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Intrinsic muscles of the tongue
Superior longitudinal muscle Inferior
longitudinal muscle Transverse muscle Vertical
muscle

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Intrinsic muscles of the tongue
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Intrinsic muscles of the tongue
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Nerve supply of muscles of tongue
Hypoglosal nerve except palatoglossus muscle
that supply by pharyngeal plexus
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Lingual artery
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Lingual vein
Venae comitantes Vena comitans nervi hypoglossi
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Structures in the floor of the mouth
Mylohyoid muscle Geniohyoid muscle Sublingual
salivary gland Submandibular duct Submandibular
ganglion
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Mylohyoid muscle Geniohyoid muscle
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Mylohyoid muscle
Action

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

Nerve supply
Mylohyoid nerve
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Geniohyoid muscle
Action

• Elevate hyoid bone and tongue

Nerve supply
C1 ???????????? hypoglossal nerve
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Sublingual salivary gland Submandibular duct
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Submandibular ganglion
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Glossopharyngeal nerve
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Hypoglossal nerve
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