Podcast
Questions and Answers
Which cranial nerve is primarily responsible for innervating the lacrimal gland?
Which cranial nerve is primarily responsible for innervating the lacrimal gland?
- Oculomotor Nerve
- Glossopharyngeal Nerve
- Vagus Nerve
- Facial Nerve (correct)
What is the primary function of the parasympathetic nervous system?
What is the primary function of the parasympathetic nervous system?
- Stimulating 'fight or flight' responses
- Enhancing cardiac output
- Promoting digestion and energy conservation (correct)
- Inhibiting glandular secretions
Damage to which cranial nerve would most likely affect salivation?
Damage to which cranial nerve would most likely affect salivation?
- Oculomotor Nerve
- Abducens Nerve
- Facial Nerve (correct)
- Accessory Nerve
Which ganglion is associated with the Glossopharyngeal Nerve?
Which ganglion is associated with the Glossopharyngeal Nerve?
What type of fibers do preganglionic neurons in the autonomic nervous system carry?
What type of fibers do preganglionic neurons in the autonomic nervous system carry?
Which of the following functions is NOT typically associated with the parasympathetic nervous system?
Which of the following functions is NOT typically associated with the parasympathetic nervous system?
What is the role of the Vagus Nerve in the parasympathetic nervous system?
What is the role of the Vagus Nerve in the parasympathetic nervous system?
Which cranial nerve has branches that facilitate taste sensation as well as parasympathetic functions?
Which cranial nerve has branches that facilitate taste sensation as well as parasympathetic functions?
Which cranial nerve primarily provides parasympathetic fibers to the majority of the muscles of the pharynx, soft palate, and larynx?
Which cranial nerve primarily provides parasympathetic fibers to the majority of the muscles of the pharynx, soft palate, and larynx?
Which ganglion is associated with the otic ganglion?
Which ganglion is associated with the otic ganglion?
What type of fibers are conveyed by the facial nerve (VII) in relation to the lacrimal gland?
What type of fibers are conveyed by the facial nerve (VII) in relation to the lacrimal gland?
Damage to which nerves may lead to a loss of parasympathetic innervation to the smooth muscles of the gastrointestinal tract?
Damage to which nerves may lead to a loss of parasympathetic innervation to the smooth muscles of the gastrointestinal tract?
What would happen if the short ciliary nerves were damaged?
What would happen if the short ciliary nerves were damaged?
Which cranial nerve conveys special sensory fibers responsible for taste sensation to the tongue?
Which cranial nerve conveys special sensory fibers responsible for taste sensation to the tongue?
Which statement regarding the parotid gland is incorrect?
Which statement regarding the parotid gland is incorrect?
Which cranial nerve carries both parasympathetic fibers and special sensory fibers?
Which cranial nerve carries both parasympathetic fibers and special sensory fibers?
Flashcards
Vagus Nerve Function
Vagus Nerve Function
The vagus nerve carries parasympathetic fibers to the trachea, bronchi, and most of the GI tract; it also regulates heart rate and provides visceral sensation.
Cranial Nerve Parasympathetic Fibers
Cranial Nerve Parasympathetic Fibers
Specific cranial nerves carry parasympathetic fibers (PS) to organs like the heart, glands, and smooth muscles in the digestive system.
Otic Ganglion and Cranial Nerve
Otic Ganglion and Cranial Nerve
The nerve synapsing at the otic ganglion is supplied by the mandibular nerve (branch of cranial nerve V3).
Cranial Nerve with All Fiber Types
Cranial Nerve with All Fiber Types
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Parasympathetic Innervation of Parotid Gland
Parasympathetic Innervation of Parotid Gland
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Submandibular and Sublingual Glands Innervation
Submandibular and Sublingual Glands Innervation
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Cranial Nerves with SSA/PS
Cranial Nerves with SSA/PS
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Cranial Nerves with GSE/PS
Cranial Nerves with GSE/PS
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Parasympathetic nervous system
Parasympathetic nervous system
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Autonomic Nervous System
Autonomic Nervous System
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Cranial Parasympathetic Nerves
Cranial Parasympathetic Nerves
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Oculomotor Nerve
Oculomotor Nerve
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Facial Nerve Branches
Facial Nerve Branches
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Glossopharyngeal Nerve
Glossopharyngeal Nerve
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Vagus nerve
Vagus nerve
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Ganglia (Parasympathetic)
Ganglia (Parasympathetic)
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Study Notes
Autonomic Nervous System
- The autonomic nervous system (ANS) adapts an organism's internal state to environmental changes without conscious thought.
- It innervates smooth muscle, cardiac muscle, glands, as well as GVA fibers from viscera, blood vessels and glands to the central nervous system (CNS).
- The ANS is a two-neuron pathway.
- Pre-ganglionic neurons have their cell bodies located in the CNS.
- Post-ganglionic neurons have their cell bodies located in peripheral ganglia.
Parasympathetic Division
- The parasympathetic division is the restful or energy-conserving division, often called "rest and digest".
- The parasympathetic division innervates the smooth muscle of the trachea, bronchi and gastro-intestinal tract (up to the distal 1/3rd of the transverse colon).
- It also regulates heart rhythm and provides visceral sensation to the organ.
Cranial Parasympathetic
- Cranial parasympathetic nerves include cranial nerves III, VII, IX and X.
- Oculomotor nerve: (ciliary ganglion>pupilla)
- Facial nerve: (pterygopalatine&submandibular ganglia>lacrimal gland, submandibular and sublingual glands)
- Glossopharyngeal nerve: (otic ganglion>parotid gland)
- Vagus nerve: (intramural ganglia>all the organs up to the left colic flexure of the large intestines)
Sacral Parasympathetic
- Sacral parasympathetic nerves (S2-S4) innervate the area starting the distal 1/3rd of transverse colon all the way down.
Ciliary Ganglion
- The ciliary ganglion is a ganglion that is a part of the parasympathetic nervous system
- Oculomotor Nerve innervates the ciliary ganglion
- The ganglion regulates pupil size, and it has short ciliary nerves that innervate the smooth muscle of the eye.
Facial Nerve
- Innervates the salivary glands, including nasal and palatine glands, submandibular and sublingual glands, and the lacrimal glands.
- It has connections with pterygopalatine ganglion and submandibular ganglion.
Glossopharyngeal Nerve
- The glossopharyngeal nerve innervates the parotid gland and participates in taste sensation on the posterior 1/3 of the tongue.
- The glossopharyngeal nerve has connections with the otic ganglion and the tympanic nerve.
Vagus Nerve
- The vagus nerve is a part of the parasympathetic division of the autonomic nervous system.
- It provides sensory, motor, and parasympathetic innervation to various organs in the thoracic and abdominal cavities.
- The vagus nerve plays a crucial role in regulating numerous bodily functions, including digestion, heart rate, and respiration.
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