{"id":205881,"date":"2025-03-25T18:56:05","date_gmt":"2025-03-25T18:56:05","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=205881"},"modified":"2025-03-25T18:56:08","modified_gmt":"2025-03-25T18:56:08","slug":"which-of-these-cranial-nerves-contains-preganglionic-parasympathetic-fibers","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/25\/which-of-these-cranial-nerves-contains-preganglionic-parasympathetic-fibers\/","title":{"rendered":"Which of these cranial nerves contains preganglionic parasympathetic fibers"},"content":{"rendered":"\n<p>Which of these cranial nerves contains preganglionic parasympathetic fibers?<\/p>\n\n\n\n<p>options:<\/p>\n\n\n\n<p>olfactory , ?I<\/p>\n\n\n\n<p>optic, II<\/p>\n\n\n\n<p>oculomotor, III<\/p>\n\n\n\n<p>trochlear, IV<\/p>\n\n\n\n<p>trigeminal, V<\/p>\n\n\n\n<p>abducens, VI<\/p>\n\n\n\n<p>facial, VII<\/p>\n\n\n\n<p>vestibulocochlear, VIII<\/p>\n\n\n\n<p>glossopharyngeal, IX<\/p>\n\n\n\n<p>vagus, X<\/p>\n\n\n\n<p>accessory, XI<\/p>\n\n\n\n<p>hypoglossal, XII<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The cranial nerves that contain <strong>preganglionic parasympathetic fibers<\/strong> are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Oculomotor nerve (III)<\/strong><\/li>\n\n\n\n<li><strong>Facial nerve (VII)<\/strong><\/li>\n\n\n\n<li><strong>Glossopharyngeal nerve (IX)<\/strong><\/li>\n\n\n\n<li><strong>Vagus nerve (X)<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Correct Answer:<\/h3>\n\n\n\n<p><strong>Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X) contain preganglionic parasympathetic fibers.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The parasympathetic nervous system is responsible for &#8220;rest and digest&#8221; functions. The <strong>preganglionic parasympathetic fibers<\/strong> originate in the brainstem and travel via specific cranial nerves to synapse in ganglia near their target organs.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Oculomotor Nerve (III)<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Originates in the Edinger-Westphal nucleus.<\/li>\n\n\n\n<li>Synapses in the <strong>ciliary ganglion<\/strong>.<\/li>\n\n\n\n<li>Controls pupil constriction (miosis) and accommodation of the lens.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Facial Nerve (VII)<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Originates in the <strong>superior salivatory nucleus<\/strong>.<\/li>\n\n\n\n<li>Synapses in the <strong>pterygopalatine and submandibular ganglia<\/strong>.<\/li>\n\n\n\n<li>Stimulates lacrimal, submandibular, and sublingual glands for tear and saliva production.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Glossopharyngeal Nerve (IX)<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Originates in the <strong>inferior salivatory nucleus<\/strong>.<\/li>\n\n\n\n<li>Synapses in the <strong>otic ganglion<\/strong>.<\/li>\n\n\n\n<li>Stimulates the <strong>parotid gland<\/strong> to produce saliva.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Vagus Nerve (X)<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Originates in the <strong>dorsal motor nucleus of the vagus<\/strong>.<\/li>\n\n\n\n<li>Has numerous ganglia near thoracic and abdominal organs.<\/li>\n\n\n\n<li>Provides parasympathetic control to the <strong>heart, lungs, and most of the gastrointestinal tract<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Excluded Nerves:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Olfactory (I), Optic (II), Trochlear (IV), Trigeminal (V), Abducens (VI), Vestibulocochlear (VIII), Accessory (XI), and Hypoglossal (XII)<\/strong> do not contain parasympathetic fibers.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/03\/image-1445.png\" alt=\"\" class=\"wp-image-205885\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Which of these cranial nerves contains preganglionic parasympathetic fibers? options: olfactory , ?I optic, II oculomotor, III trochlear, IV trigeminal, V abducens, VI facial, VII vestibulocochlear, VIII glossopharyngeal, IX vagus, X accessory, XI hypoglossal, XII The correct answer and explanation is : The cranial nerves that contain preganglionic parasympathetic fibers are: Correct Answer: Oculomotor (III), [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-205881","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205881","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=205881"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/205881\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=205881"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=205881"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=205881"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}