Anatomy & Physiology: An Integrative Approach
Anatomy & Physiology: An Integrative Approach
2nd Edition
ISBN: 9780078024283
Author: Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle
Publisher: McGraw-Hill Education
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Chapter 13, Problem 1DYKB

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

  1. a. accessory (CN XI)
  2. b. glossopharyngeal (CN IX)
  3. c. trigeminal (CN V)
  4. d. hypoglossal (CN XII)
Expert Solution & Answer
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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 1DYKB

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

Chapter 13 Solutions

Anatomy & Physiology: An Integrative Approach

Ch. 13.3 - Prob. 11WDYLCh. 13.3 - What is the function of the corpus callosum?Ch. 13.3 - Prob. 13WDYLCh. 13.3 - Prob. 14WDYLCh. 13.3 - Prob. 15WDYLCh. 13.3 - Prob. 16WDYLCh. 13.3 - Prob. 17WDYLCh. 13.3 - Prob. 18WDYLCh. 13.3 - Prob. 19WDYLCh. 13.3 - Prob. 20WDYLCh. 13.4 - Prob. 21WDYLCh. 13.4 - What is the general function of the thalamus?Ch. 13.4 - Prob. 23WDYLCh. 13.5 - What is the function of the substantia nigra, and...Ch. 13.5 - Prob. 25WDYLCh. 13.5 - Prob. 26WDYLCh. 13.5 - Prob. 27WDYLCh. 13.5 - What are the three main autonomic centers located...Ch. 13.6 - Prob. 29WDYLCh. 13.6 - Prob. 30WDYLCh. 13.6 - Prob. 31WDYLCh. 13.7 - Prob. 32WDYLCh. 13.7 - Prob. 33WDYLCh. 13.7 - How is the reticular activating system related to...Ch. 13.8 - Prob. 35WDYLCh. 13.8 - Prob. 36WDYLCh. 13.8 - What are the main differences between non-REM and...Ch. 13.8 - Prob. 38WDYLCh. 13.8 - Prob. 39WDYLCh. 13.8 - Prob. 40WDYLCh. 13.8 - How is the Wernicke area involved in language...Ch. 13.8 - Prob. 42WDYLCh. 13 - _____ 1. Which cranial nerve is responsible for...Ch. 13 - Prob. 2DYKBCh. 13 - _____ 3. Which of these is the least likely to...Ch. 13 - Prob. 4DYKBCh. 13 - _____ 5. Which of the following statements is...Ch. 13 - Prob. 6DYKBCh. 13 - Prob. 7DYKBCh. 13 - Prob. 8DYKBCh. 13 - Prob. 9DYKBCh. 13 - Prob. 10DYKBCh. 13 - Prob. 11DYKBCh. 13 - Prob. 12DYKBCh. 13 - Prob. 13DYKBCh. 13 - Prob. 14DYKBCh. 13 - Prob. 15DYKBCh. 13 - Describe the pathway by which the pressure applied...Ch. 13 - Prob. 17DYKBCh. 13 - During surgery to remove a tumor from the...Ch. 13 - What is the difference between apraxia of speech...Ch. 13 - Prob. 20DYKBCh. 13 - Prob. 1CALCh. 13 - Prob. 2CALCh. 13 - Prob. 3CALCh. 13 - Why did Shannon experience the problems with her...Ch. 13 - Prob. 5CALCh. 13 - Peyton felt strange when she awoke one morning....Ch. 13 - Prob. 2CSLCh. 13 - During a robbery at his convenience store, Dustin...
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