Nervus intermedius
Updates to Article Attributes
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was changed:
The nervus intermedius (a.k.a nerve of Wrisberg) is a part of cranialnerve VII (facial(facial nerve) which contains somatic sensory, specialsensory, and visceral motor (secretomotor) fibres1.
Gross Anatomy
Nuclei
- superior salivatory nucleus
- parasympathetic supply to the parotid, lacrimal, submandibular, submental, and salivary glands.
- nucleus of the tractus solitarus
- receives taste information from the anterior two-thirds of the tongue (via chorda tympani)
- sensory nuclei of the trigeminal nerve
- external acoustic meatus and concha of external ear1
Course
The nervus intermedius exits the brainstem at the boundary betweenpons and inferior cerebellar peduncle lateral to the motor root of thefacial nerve and medial to the vestibulocochlear nerve (in closeproximity to the pontomedullary junction).It travels with the motor root of the facial nerve through thecerebellopontine angle towards the internal acoustic meatus where itenters the anteior superior quadrant to travel through the petroustemporal bone. At the geniculate ganglion (at the first genu) it joinsthe motor root of the facial nerve1,2
Branches
Branches of the facial nerve including:
-
greater (superficial) petrosal nerve
- to the pterygopalatine ganglion
- tympanic branches
- chorda tympani 1,2
MRIRadiological appearance
MRI
- not visible on CT or 1.5T MRI
- best appreciated on axial 3T MRI through the cerebellopontine angle travelling towards the IAC 3
Related Pathology
- Facial Nerve Schwannoma 2
- Nervus Intermedius Neuralgia 4
-<p>The nervus intermedius (a.k.a nerve of Wrisberg) is a part of cranial<br>nerve VII (facial nerve) which contains somatic sensory, special<br>sensory, and visceral motor (secretomotor) fibres<sup>1</sup>.</p><h4>Gross Anatomy</h4><h5>Nuclei</h5><ul>- +<p>The nervus intermedius (a.k.a nerve of Wrisberg) is a part of cranial<br>nerve VII (<a href="/articles/facial-nerve">facial nerve</a>) which contains somatic sensory, special<br>sensory, and visceral motor (secretomotor) fibres<sup>1</sup>.</p><h4>Gross Anatomy</h4><h5>Nuclei</h5><ul>
-<li>nucleus of the tractus solitarus<ul><li>receives taste information from the anterior two-thirds of the tongue (via chorda tympani)</li></ul>- +<li>nucleus of the tractus solitarus<ul><li>receives taste information from the anterior two-thirds of the tongue (via <a href="/articles/chorda-tympani">chorda tympani</a>)</li></ul>
-</ul><h5>Course</h5><p>The nervus intermedius exits the brainstem at the boundary between<br>pons and inferior cerebellar peduncle lateral to the motor root of the<br>facial nerve and medial to the vestibulocochlear nerve (in close<br>proximity to the pontomedullary junction)<br>It travels with the motor root of the facial nerve through the<br>cerebellopontine angle towards the internal acoustic meatus where it<br>enters the anteior superior quadrant to travel through the petrous<br>temporal bone. At the geniculate ganglion (at the first genu) it joins<br>the motor root of the facial nerve<sup>1,2</sup></p><h5>Branches</h5><p>Branches of the facial nerve including:</p><ul>-<li>greater petrosal nerve<ul><li>to the pterygopalatine ganglion</li></ul>- +</ul><h5>Course</h5><p>The nervus intermedius exits the brainstem at the boundary between<br>pons and inferior cerebellar peduncle lateral to the motor root of the<br>facial nerve and medial to the <a href="/articles/vestibulocochlear-nerve">vestibulocochlear nerve</a> (in close<br>proximity to the pontomedullary junction).<br>It travels with the motor root of the facial nerve through the<br>cerebellopontine angle towards the internal acoustic meatus where it<br>enters the anteior superior quadrant to travel through the <a href="/articles/petrous-part-of-temporal-bone">petrous<br>temporal bone</a>. At the <a href="/articles/geniculate_ganglion">geniculate ganglion</a> (at the first genu) it joins<br>the motor root of the facial nerve<sup>1,2</sup></p><h5>Branches</h5><p>Branches of the facial nerve including:</p><ul>
- +<li>
- +<a href="/articles/greater-superficial-petrosal-nerve">greater (superficial) petrosal nerve</a><ul><li>to the pterygopalatine ganglion</li></ul>
-</ul><h4>MRI appearance</h4><ul>- +</ul><h4>Radiological appearance </h4><h5>MRI</h5><ul>
-<a title="Facial nerve schwannoma" href="/articles/facial_nerve_schwannoma">Facial Nerve Schwannoma</a> <sup>2</sup>- +<a href="/articles/facial_nerve_schwannoma">Facial Nerve Schwannoma</a> <sup>2</sup>
References changed:
- 3. Burmeister HP, Baltzer PA, Dietzel M et-al. Identification of the nervus intermedius using 3T MR imaging. AJNR Am J Neuroradiol. 2011;32 (3): 460-4. <a href="http://dx.doi.org/10.3174/ajnr.A2338">doi:10.3174/ajnr.A2338</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/21292799">Pubmed citation</a><span class="auto"></span>
- 4. Figueiredo R, Vazquez-Delgado E, Okeson JP et-al. Nervus intermedius neuralgia: a case report. Cranio. 2007;25 (3): 213-7. <a href="http://www.ncbi.nlm.nih.gov/pubmed/17696039">Pubmed citation</a><span class="auto"></span>
- 1. McMinn. Lasts Anatomy Regional and Applied. CHURCHILL LIVINGSTONE. (2003) ISBN:B0084AQDG8. <a href="http://books.google.com/books?vid=ISBNB0084AQDG8">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/B0084AQDG8">Find it at Amazon</a><span class="ref_v3"></span>
- 2. Tubbs RS, Steck DT, Mortazavi MM et-al. The nervus intermedius: a review of its anatomy, function, pathology, and role in neurosurgery. World Neurosurg. 2013;79 (5-6): 763-7. <a href="http://dx.doi.org/10.1016/j.wneu.2012.03.023">doi:10.1016/j.wneu.2012.03.023</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/22484073">Pubmed citation</a><span class="auto"></span>
Tags changed:
- neuroanatomy
- anatomy
Sections changed:
- Anatomy
Systems changed:
- Central Nervous System
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