Muscles of the Tongue Flashcards

1
Q

What are the muscles of the Tongue?

A

Intrinsic Muscles, Extrinsic Muscles (Genioglossus, Hyoglossus, Styloglossus, Palatoglossus)

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2
Q

What is the origin of the Intrinsic muscles?

A

confined to tongue

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3
Q

What is the insertion of the Intrinsic muscles?

A

no bony attachment

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4
Q

What is the innervation of the Intrinsic muscles?

A

CN XII

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5
Q

What is the action of the Intrinsic muscles?

A

function to change the shape of the tongue

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6
Q

What is noteworthy about the Intrinsic muscles?

A

consist of fibers that run longitudinally, vertically, and transversely.

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7
Q

What is the origin of the Genioglossus muscle?

A

mental spine of mandible

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8
Q

What is the insertion of the Genioglossus muscle?

A

entire dorsum of tongue, body of hyoid

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9
Q

What is the innervation of the Genioglossus muscle?

A

CN XII

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10
Q

What is the blood supply of the Genioglossus muscle?

A

lingual artery

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11
Q

What is the action of the Genioglossus muscle?

A

unilaterally will push tongue to contralateral side.

bilaterally will protrude the tongue

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12
Q

What is the origin of the Hyoglossus muscle?

A

body and greater horn of hyoid

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13
Q

What is the insertion of the Hyoglossus muscle?

A

inferior aspects of lateral part of the tongue

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14
Q

What is the innervation of the Hyoglossus muscle?

A

CN XII

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15
Q

What is the blood supply of the Hyoglossus muscle?

A

lingual artery

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16
Q

What is the action of the Hyoglossus muscle?

A

depresses tongue

17
Q

What is the origin of the Styloglossus muscle?

A

distal styloid process, stylohyoid ligament

18
Q

What is the insertion of the Styloglossus muscle?

A

margins of tongue posteriorly

19
Q

What is the innervation of the Styloglossus muscle?

A

CN XII

20
Q

What is the blood supply of the Styloglossus muscle?

A

ascending pharyngeal artery

21
Q

What is the action of the Styloglossus muscle?

A

retrudes tongue