_____ 1. Which cranial nerve is responsible for innervating the intrinsic and extrinsic tongue muscles? a. accessory (CN XI) b. glossopharyngeal (CN IX) c. trigeminal (CN V) d. hypoglossal (CN XII)

Question

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Answer 1

Textbook Question

Chapter 13, Problem 1DYB

_____ 1. Which cranial nerve is responsible for innervating the intrinsic and extrinsic tongue muscles?

a. accessory (CN XI)
b. glossopharyngeal (CN IX)
c. trigeminal (CN V)
d. hypoglossal (CN XII)

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

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Students have asked these similar questions

Which cranial nerve has three divisions (ophthalmic, maxillary,and mandibular)?a. accessory (CN XI)b. glossopharyngeal (CN IX)c. trigeminal (CN V)d. hypoglossal (CN XII)

Choose the action of the cranial nerve and write the letter next to the cranial number. ____ I. A. Movement of lateral rectus muscle ____ II. B. Speech and swallowing—tongue muscles ____ III. C. Taste; facial expression; tears; salivation ____ IV. D. Equilibrium and hearing ____ V. E. Smell ____ VI. F. Movement of superior oblique muscle ____ VII. G. Movement of head and shoulders—sternocleidomastoid and trapezius muscles ____ VIII. H. Vision ____ IX. I. Posterior 1/3 of tongue; taste, swallowing and speech; secretion of saliva ____ X. J. Cutaneous sensations from ophthalmic, maxillary, and mandibular areas; chewing ____ XI. K. Taste; pharynx and epiglottis sensations; swallowing, coughing; voice production; smooth muscle of GI tract; secretion of digestive glands; slows heart rate ____ XII. L. Movement of 4 extrinsic eye muscles; accommodation of lens; pupillary constriction

Select the cranial nerves that arise from the Medulla Oblongata IV. Trochlear nerve X. Vagus nerve VI. Abducens nerve IX. Glossopharyr nerve VIII. Vestibulococt nerve I. Olfactory nerve V. Trigeminal nerve III. Oculomotor nerve XI. Accessory nerve XII. Hypoglossal nerve Cranial nerve diagram

Answer 2

Textbook Question

Chapter 13, Problem 1DYB

_____ 1. Which cranial nerve is responsible for innervating the intrinsic and extrinsic tongue muscles?

a. accessory (CN XI)
b. glossopharyngeal (CN IX)
c. trigeminal (CN V)
d. hypoglossal (CN XII)

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

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Answer 3

Textbook Question

Chapter 13, Problem 1DYB

_____ 1. Which cranial nerve is responsible for innervating the intrinsic and extrinsic tongue muscles?

a. accessory (CN XI)
b. glossopharyngeal (CN IX)
c. trigeminal (CN V)
d. hypoglossal (CN XII)

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

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Answer 4

Textbook Question

Chapter 13, Problem 1DYB

_____ 1. Which cranial nerve is responsible for innervating the intrinsic and extrinsic tongue muscles?

a. accessory (CN XI)
b. glossopharyngeal (CN IX)
c. trigeminal (CN V)
d. hypoglossal (CN XII)

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.

Conclusion

The hypoglossal nerve innervates the extrinsic and intrinsic muscles of the tongue.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

There are 12 pairs of cranial nerves which originate towards the inferior surface of the brain. The cranial nerves are a part of the peripheral nervous system. The naming of cranial nerves is based on the positions. The naming begins from the anteriorly placed nerves.

Answer 12

Answer to Problem 1DYB

Correct answer:

The hypoglossal nerve innervates intrinsic tongue muscle as well as the extrinsic tongue muscles. Therefore, option d. is correct.

Answer 13

Explanation of Solution

Reason for the correct statement:

Option d. is given as “hypoglossal (CN XII)”. There are nine pairs of cranial nerves which have somatic functions with the autonomic or sensory roles. The CN XII has only somatic motor function. This nerve innervates the extrinsic and intrinsic tongue muscles. Hence, intrinsic and extrinsic tongue muscles are innervated by hypoglossal or CN XII.

Hence, option d. is correct.

Reasons for incorrect statements:

Option a. is given as “accessory (CN XI)”. CN XI innervates the sternocleidomastoid and trapezius muscles. Hence, option a. is incorrect.

Option b. is given as “glossopharyngeal (CN IX)”. CN IX receives touch and taste sensation from one-third of the tongue and also innervates the parotid salivary gland and pharynx muscles. Hence, option b. is incorrect.

Option c. is given as “trigeminal (CN V)”. CN V innervates the muscles of mastication and receives sensory signals from the anterior scalp, meninges, nasal cavity, oral cavity, and face. Hence, option c. is incorrect.

Hence, options a., b., and c. are incorrect.