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Questions and Answers
Which cranial nerves are formed from the pharyngeal plexus?
Which cranial nerves are formed from the pharyngeal plexus?
- Glossopharyngeal nerve (correct)
- Vagus nerve (correct)
- Trigeminal nerve
- Hypoglossal nerve
Which muscle is innervated by the glossopharyngeal nerve?
Which muscle is innervated by the glossopharyngeal nerve?
- Mylohyoid muscle
- Palatoglossus muscle
- Stylopharyngeus muscle (correct)
- Stylohyoid muscle
What type of fibers are contained in the hypoglossal nerve?
What type of fibers are contained in the hypoglossal nerve?
- Efferent autonomic
- Afferent
- Efferent somatic (correct)
- Preganglionic sympathetic
Which nerve is primarily responsible for innervating the muscles of the face?
Which nerve is primarily responsible for innervating the muscles of the face?
Which cranial nerve does not contribute to the pharyngeal plexus?
Which cranial nerve does not contribute to the pharyngeal plexus?
Which nerve is responsible for swallowing, taste, and secreting saliva?
Which nerve is responsible for swallowing, taste, and secreting saliva?
What is the primary function of the glossopharyngeal nerve?
What is the primary function of the glossopharyngeal nerve?
Which of the following is not a function of the trigeminal nerve?
Which of the following is not a function of the trigeminal nerve?
Through which foramen does the facial nerve exit the skull?
Through which foramen does the facial nerve exit the skull?
Which nerve innervates the sternocleidomastoid muscle?
Which nerve innervates the sternocleidomastoid muscle?
Which muscle does not receive innervation from the hypoglossal nerve?
Which muscle does not receive innervation from the hypoglossal nerve?
What structure gives rise to the superior root of the ansa cervicalis?
What structure gives rise to the superior root of the ansa cervicalis?
Where are the sensory neurons of the glossopharyngeal nerve located?
Where are the sensory neurons of the glossopharyngeal nerve located?
Which nucleus of the vagus nerve gives rise to vegetative fibers?
Which nucleus of the vagus nerve gives rise to vegetative fibers?
Which branch is NOT associated with the glossopharyngeal nerve?
Which branch is NOT associated with the glossopharyngeal nerve?
Which of the following is a function of the glossopharyngeal nerve?
Which of the following is a function of the glossopharyngeal nerve?
Which anatomical structure is innervated by the superior laryngeal nerve?
Which anatomical structure is innervated by the superior laryngeal nerve?
Which of the following is considered an extracranial branch of the facial nerve?
Which of the following is considered an extracranial branch of the facial nerve?
Fibers from which spinal nerve roots accompany the hypoglossal nerve after exiting the cranial cavity?
Fibers from which spinal nerve roots accompany the hypoglossal nerve after exiting the cranial cavity?
Which cranial nerve is responsible for tears, saliva, taste, and facial expressions?
Which cranial nerve is responsible for tears, saliva, taste, and facial expressions?
From which spinal segments does the spinal part of the accessory nerve arise?
From which spinal segments does the spinal part of the accessory nerve arise?
Which muscle receives somatic motor innervation from the accessory nerve?
Which muscle receives somatic motor innervation from the accessory nerve?
Which cranial nerve primarily governs muscles responsible for facial expressions?
Which cranial nerve primarily governs muscles responsible for facial expressions?
What function is primarily associated with the glossopharyngeal nerve?
What function is primarily associated with the glossopharyngeal nerve?
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Study Notes
Cranial Nerves
- The glossopharyngeal nerve (IX) and vagus nerve (X) are formed from the pharyngeal plexus
- The glossopharyngeal nerve innervates specifically the stylopharyngeus muscle
- The hypoglossal nerve (XII) contains efferent somatic fibers
- The hypoglossal nerve is formed by fibers from the C1-C2 spinal nerve roots
- The facial nerve (VII) innervates the muscles of the face
- The facial nerve exits the skull through the stylomastoid foramen
- The glossopharyngeal nerve is responsible for swallowing, taste, and secreting saliva
- The accessory nerve (XI) innervates the sternocleidomastoid muscle
- The dorsal nucleus of the vagus nerve contains vegetative fibers
- The ansa cervicalis is formed by the joining of the superior and inferior roots
- The superior root of the ansa cervicalis originates from the hypoglossal nerve
- The inferior root of the ansa cervicalis originates from the cervical plexus
- The three branches of the glossopharyngeal nerve are the tympanic nerve, pharyngeal branches, and tonsillar branches
- The superior laryngeal nerve innervates the pharyngeal mucosa and the mucous membrane of the larynx
- The buccal branch is an extracranial branch of the facial nerve
- Tears, saliva, taste, and facial expressions are caused by the facial nerve
- The spinal part of the accessory nerve arises from the C1-C5/C6 spinal segments
- The accessory nerve innervates the trapezius muscle
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