Training Collections
Library Memberships
On-demand course library with video lectures, expert case reviews, and more
Fellowship Certificate™ Programs
Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
Ultimate Learning Pass
Unlock access to our full Course Library and all self-paced Fellowships.
Continuing Medical Education (State CME)
Complete all of your state CME requirements in one convenient place.
Noon Conference (Free)
Get access to free live lectures, every week, from top radiologists.
Case of the Week (Free)
Get a free weekly case delivered right to your inbox.
Case Crunch: Rapid Case Review (Free)
Register for free live board reviews.
Dr. Resnick's MSK Conference
Learn directly from the MSK Master himself.
Lower Extremities MRI Conference
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
For Training Programs
Supplement your training program with case-based learning for residents, registrars, fellows, and more.
For Private Practices
Upskill in high growth, advanced imaging areas.
Compliance
NewTrack, fulfill, and report on all your radiologists' credentialing and licensing requirements.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
Training Collections
Library Memberships
On-demand course library with video lectures, expert case reviews, and more
Fellowship Certificate™ Programs
Practice-focused training programs designed to help you gain experience in a specific subspecialty area.
Ultimate Learning Pass
Unlock access to our full Course Library and all self-paced Fellowships.
Continuing Medical Education (State CME)
Complete all of your state CME requirements in one convenient place.
Noon Conference (Free)
Get access to free live lectures, every week, from top radiologists.
Case of the Week (Free)
Get a free weekly case delivered right to your inbox.
Case Crunch: Rapid Case Review (Free)
Register for free live board reviews.
Dr. Resnick's MSK Conference
Learn directly from the MSK Master himself.
Lower Extremities MRI Conference
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
For Training Programs
Supplement your training program with case-based learning for residents, registrars, fellows, and more.
For Private Practices
Upskill in high growth, advanced imaging areas.
Compliance
NewTrack, fulfill, and report on all your radiologists' credentialing and licensing requirements.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
19 topics, 41 min.
Introduction to Gross Anatomy of the Brain
4 m.Frontal Lobar Anatomy
5 m.Sylvian Fissure
3 m.Middle Frontal Gyrus
2 m.Inferior Parietal Lobule
2 m.Central Sulcus of Rolando
3 m.Intraparietal Sulcus
2 m.Localizing the Intraparietal Lobule Part 2
2 m.Localizing the Intraparietal Lobule Part 3
2 m.Pars Marginalis
2 m.Parieto-occipital Sulcus
2 m.Pars Marginalis on Axial Imaging
3 m.Midline Sagittal Commissures
2 m.Basic Brainstem Anatomy
2 m.Midline Cerebellum (Vermis)
3 m.Midline Cisterns and Spaces
2 m.Midline Sagittal Blood Supplies
4 m.Midline Skeletal Anatomy
3 m.Miscellaneous Midline Structures
3 m.52 topics, 2 hr. 14 min.
The Olfactory Nerve – Cranial Nerve I
4 m.The Olfactory Bulb
5 m.The Olfactory Tracts
5 m.The Optic Nerve – Cranial Nerve II
3 m.The Globe and Optic Pathway
5 m.Chiasm & Retrochiasmatic Pathway
3 m.Destinations of Optic Nerve Signals
3 m.The Oculomotor Nerve – Cranial Nerve III
4 m.Oculomotor Nerve: Course, Adjacent Structures & Destination
4 m.Oculomotor Nerve: Nuclei and Intramedullary Course
3 m.Third Nerve Syndromes
5 m.The Trochlear Nerve - Cranial Nerve IV
3 m.Trochlear Nerve: Course and Pathologies
3 m.The Trigeminal Nerve – Cranial Nerve V
3 m.Trigeminal Nerve Synapses in the Brainstem
6 m.Nuclear Anatomy and Position of the Trigeminal System
4 m.Parasympathetic Ganglia Anatomy of the Head and Neck
2 m.MRI anatomy of the Submandibular Ganglion
4 m.MRI Anatomy of the Pterygopalatine Ganglion
3 m.Trigeminal Nerve - V1 Division
2 m.Trigeminal Nerve - V2 Division
2 m.Trigeminal Nerve - V3 Division
3 m.The Abducens Nerve – Cranial Nerve VI
3 m.Cranial Nerves 1-6: Review
3 m.Abducens Nerve Nucleus and Nerve
4 m.Identifying the Cisternal Abducens Nerve
3 m.The Facial Nerve: Nucleus and Intramedullary Course
3 m.The Facial Nerve – Cranial Nerve VII
2 m.Facial Nerve: Medullary, Cisternal, and Canalicular Segments
3 m.Seventh Nerve Segments on MRI
5 m.Facial Nerve: Motor, Sensory, and Parasympathetic Branches
2 m.Proximal Branches of the Facial Nerve
3 m.Distal Branches of the Facial Nerve
2 m.The Posterior Auricular Nerve
2 m.The Greater Petrosal Nerve
2 m.The Vestibulocochlear Nerve – Cranial Nerve VIII
4 m.Cranial Nerves 7 & 8: Cisternal Course at the CPA
2 m.Vestibulocochlear Nerve: Cochlea and Internal Auditory Canal
2 m.Glossopharyngeal Nerve – Cranial Nerve IX
2 m.Glossopharyngeal Nerve Course
2 m.Exit of the Glossopharyngeal Nerve
2 m.Nuclei of the Glossopharyngeal Nerve
3 m.Glossopharyngeal Nerve Summary
2 m.The Vagus Nerve – Cranial Nerve X
2 m.Nuclei of the Vagus Nerve
2 m.The Innervations of the Vagus Nerve
4 m.Function of Vagal Nuclei
3 m.Accessory Nerve – Cranial Nerve XI
2 m.Accessory Nerve Summary
3 m.The Hypoglossal Nerve – Cranial Nerve XII
3 m.The Descent of the Hypoglossal Nerve
2 m.The Real Origin of the Hypoglossal Nerve
2 m.0:00
Dr. P here to talk about the 7th nerve or facial nerve.
0:05
I'm showing you a gross diagram of the brainstem at the
0:08
level of the pons.
0:09
Here's the pontomedullary sulcus.
0:12
You can see the apparent exit of the 7th nerve,
0:16
but the real origin, this is the apparent origin.
0:19
The real origin of the 7th nerve is in a nucleus.
0:23
Now, what's curious is in this sagittal diagram,
0:27
which is anatomically correct,
0:29
the 7th nerve fibers course in the brainstem for a
0:33
variable distance loop around the nucleus of six,
0:36
the abducens nerve nucleus,
0:38
and then move forward as they create the
0:41
apparent origin of the 7th nerve.
0:44
So, let's look at that in the axial projection on an MRI.
0:48
So I have before you a sagittal T1, high resolution,
0:52
thin section image on the left.
0:53
But pay no attention to that for right now,
0:55
I want to focus your attention on the right side
0:58
of the screen, the axial T2 high res image.
1:01
Here is the 6th nerve coming out anteriorly.
1:03
But I am interested in the real origin of the 7th nerve.
1:08
So, let's take a look at this axial view at the level of
1:12
the brachium pontis, the middle cerebellar peduncle.
1:15
And we have some nice little colors here
1:17
for you to make it a bit easier.
1:19
And those colors include the superior and medial
1:23
and lateral vestibular nuclei.
1:24
Over here, the medial longitudinal fasciculus,
1:27
which can be affected in multiple sclerosis.
1:31
We've got the medial lemniscus more towards the
1:34
midline as a fairly large yellow structure.
1:37
And then we've got this triad right here,
1:39
which we're going to focus on.
1:41
This is the trigeminal and mesencephalic nucleus of five.
1:45
So, let's ignore that for right now.
1:47
And then, we have seven and six.
1:50
And we said seven and six are pretty intimate with each other.
1:54
And let's look at what seven does.
1:57
Seven has its nucleus and the fibers then course posterior
2:02
around the abducens nerve,
2:05
pass in front of this green structure,
2:08
which is the trigeminal and mesencephalic nucleus of five,
2:12
and then crosses directly in front of the trapezoid body,
2:16
which is part of the hearing or auditory pathway,
2:20
before it leaves the station in the region
2:23
of the cerebellopontine angle.
2:26
So, this looping effect of the 7th nerve around
2:29
the abducens nerve nucleus is the main
2:32
teaching point of this vignette,
2:35
along with the fact that you have this very close
2:38
triad of nuclei at the apparent origin of seven,
2:43
which includes seven, five, and six.
Interactive Transcript
0:00
Dr. P here to talk about the 7th nerve or facial nerve.
0:05
I'm showing you a gross diagram of the brainstem at the
0:08
level of the pons.
0:09
Here's the pontomedullary sulcus.
0:12
You can see the apparent exit of the 7th nerve,
0:16
but the real origin, this is the apparent origin.
0:19
The real origin of the 7th nerve is in a nucleus.
0:23
Now, what's curious is in this sagittal diagram,
0:27
which is anatomically correct,
0:29
the 7th nerve fibers course in the brainstem for a
0:33
variable distance loop around the nucleus of six,
0:36
the abducens nerve nucleus,
0:38
and then move forward as they create the
0:41
apparent origin of the 7th nerve.
0:44
So, let's look at that in the axial projection on an MRI.
0:48
So I have before you a sagittal T1, high resolution,
0:52
thin section image on the left.
0:53
But pay no attention to that for right now,
0:55
I want to focus your attention on the right side
0:58
of the screen, the axial T2 high res image.
1:01
Here is the 6th nerve coming out anteriorly.
1:03
But I am interested in the real origin of the 7th nerve.
1:08
So, let's take a look at this axial view at the level of
1:12
the brachium pontis, the middle cerebellar peduncle.
1:15
And we have some nice little colors here
1:17
for you to make it a bit easier.
1:19
And those colors include the superior and medial
1:23
and lateral vestibular nuclei.
1:24
Over here, the medial longitudinal fasciculus,
1:27
which can be affected in multiple sclerosis.
1:31
We've got the medial lemniscus more towards the
1:34
midline as a fairly large yellow structure.
1:37
And then we've got this triad right here,
1:39
which we're going to focus on.
1:41
This is the trigeminal and mesencephalic nucleus of five.
1:45
So, let's ignore that for right now.
1:47
And then, we have seven and six.
1:50
And we said seven and six are pretty intimate with each other.
1:54
And let's look at what seven does.
1:57
Seven has its nucleus and the fibers then course posterior
2:02
around the abducens nerve,
2:05
pass in front of this green structure,
2:08
which is the trigeminal and mesencephalic nucleus of five,
2:12
and then crosses directly in front of the trapezoid body,
2:16
which is part of the hearing or auditory pathway,
2:20
before it leaves the station in the region
2:23
of the cerebellopontine angle.
2:26
So, this looping effect of the 7th nerve around
2:29
the abducens nerve nucleus is the main
2:32
teaching point of this vignette,
2:35
along with the fact that you have this very close
2:38
triad of nuclei at the apparent origin of seven,
2:43
which includes seven, five, and six.
Report
Description
Faculty
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
Tags
Temporal bone
Non-infectious Inflammatory
Neuroradiology
MRI
Head and Neck
Brain
© 2025 Medality. All Rights Reserved.