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.
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.
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.
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.
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.
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.
Emergency Call Prep
Prepare trainees to be on call for the emergency department with this specialized training series.
Lesson
Orbital Imaging Protocols
4 topics, 10 min.
Lesson
Orbit Anatomy
10 topics, 19 min.
Lesson
Case Review - Ocular Pathology
17 topics, 1 hr. 11 min.
Anterior Globe Rupture with Laterally Dislocated Cataract
4 m.Foreign Body in Globe
4 m.Wood Foreign Body and Ocular Hypotony
2 m.Hemmorhage in Both Chambers, Open Globe
3 m.Staphyloma
4 m.Persistent Hyperplastic Primary Vitreous (PHPV)
5 m.Retinal Detachment
3 m.Retinoblastoma on CT
4 m.Retinoblastoma on MRI
9 m.Bilateral Retinoblastoma
7 m.Ocular Pathology - Review
11 m.Endophthalmitis
3 m.PHPV Review, Coloboma, and Staphyloma
5 m.Phthisis Bulbi, Macrophthalmia, and Microphthalmia
4 m.Ocular Calcification
4 m.Retinoblastoma - Review
5 m.Choroidal Melanoma
3 m.Lesson
Case Review - Intraconal Pathology
15 topics, 1 hr. 8 min.
Intraconal, Conal and Extraconal Anatomy
1 m.Intraconal Hemangioma
5 m.Venous Vascular Malformation
3 m.Optic Nerve Glioma, NF1
4 m.Optic pathway glioma (pilocytic astrocytoma)
4 m.Optic Neuritis, Multiple Sclerosis
6 m.Optic Neuritis, Multiple Sclerosis (2)
7 m.Neuromyelitis Optica Spectrum Disorder
5 m.Neuromyelitis Optica With Spinal Cord Involvement
3 m.Optic Nerve Sheath Meningioma
5 m.Bilateral Optic Neuritis, Leukemia
6 m.Intraconal Pathology - Review
11 m.Optic Neuritis - Review
5 m.Optic Nerve Glioma - Review
4 m.Optic Nerve Sheath Meningioma - Review
6 m.Lesson
Case Review - Conal Lesions
5 topics, 16 min.
Lesson
Case Review - Extraconal Injuries and Abnormalities
18 topics, 55 min.
Extraconal Pathology - Introduction
1 m.Periorbital Cellulitis & Abscess
4 m.Type 3 Orbital Infection
3 m.Solitary Fibrous Tumor
4 m.Langerhans Cell Histiocytosis
2 m.Juvenile Ossifying Fibroma
2 m.Perineural Spread of Squamous Cell Carcinoma
5 m.Proptosis from Extraosseous Extension of Prostate Metastasis
3 m.Orbital Floor Fracture
5 m.Orbital Floor Fracture with Muscle/Fat Herniation
4 m.Orbital Floor Fracture: Status Post Repair
2 m.Bilateral Orbital Fracture Repair
2 m.Periorbital Cellulitis - Review
5 m.Orbital Pseudotumor - Review
3 m.Orbital Wall Abnormalities - Review
3 m.Orbital Fracture - Review
7 m.Giant Cell Reparative Granuloma
3 m.Granulomatous Sinusitis with IgG4-related Ophthalmic Disease
4 m.Lesson
Case Review - Orbital Appendage Pathology
6 topics, 19 min.
0:00
We describe the intraconal anatomy and the pathology
0:04
that occurs within that, usually is related to the optic
0:08
nerve and the blood vessels, and the other cranial
0:11
nerves that occur in the intraconal space.
0:14
With respect to conal anatomy,
0:17
we're really talking just about the muscles,
0:19
and there is a very limited amount of pathology that
0:22
involves just the muscles. For the most part,
0:25
we're talking about thyroid eye disease,
0:27
also known as thyroid orbitopathy and pseudotumor,
0:31
or idiopathic orbital inflammation.
0:34
The muscles that we have that are included in the
0:37
conal anatomy are the superior, inferior,
0:39
lateral and medial recti,
0:41
the inferior and superior oblique muscles.
0:44
And these are all connected via a fibrous
0:47
annulus called the annulus of Zinn.
0:51
The conal anatomy includes the rectus muscles.
0:55
These include the inferior rectus muscle,
0:59
the medial rectus muscle and the superior rectus muscle,
1:03
which are innervated by cranial nerve 3.
1:07
The lateral rectus muscle is innervated
1:10
by cranial nerve 6.
1:14
And in addition,
1:15
you have the superior oblique muscle
1:18
and the inferior oblique muscles.
1:20
The superior oblique muscle is innervated
1:22
by cranial nerve 4,
1:25
and you have the levator palpebrae muscle,
1:28
which also is innervated by cranial nerve 3.
1:31
These are seen well on the coronal image.
1:34
The inferior oblique muscle is attaching further
1:37
inferior and posterior to this diagram.
1:42
As you see on the axial scans,
1:44
we're really only seeing the lateral rectus muscle,
1:46
again, innervated by cranial nerve 6, and the medial
1:51
rectus muscle, innervated by cranial nerve 3.
The Conal Space
HIDEInteractive Transcript
0:00
We describe the intraconal anatomy and the pathology
0:04
that occurs within that, usually is related to the optic
0:08
nerve and the blood vessels, and the other cranial
0:11
nerves that occur in the intraconal space.
0:14
With respect to conal anatomy,
0:17
we're really talking just about the muscles,
0:19
and there is a very limited amount of pathology that
0:22
involves just the muscles. For the most part,
0:25
we're talking about thyroid eye disease,
0:27
also known as thyroid orbitopathy and pseudotumor,
0:31
or idiopathic orbital inflammation.
0:34
The muscles that we have that are included in the
0:37
conal anatomy are the superior, inferior,
0:39
lateral and medial recti,
0:41
the inferior and superior oblique muscles.
0:44
And these are all connected via a fibrous
0:47
annulus called the annulus of Zinn.
0:51
The conal anatomy includes the rectus muscles.
0:55
These include the inferior rectus muscle,
0:59
the medial rectus muscle and the superior rectus muscle,
1:03
which are innervated by cranial nerve 3.
1:07
The lateral rectus muscle is innervated
1:10
by cranial nerve 6.
1:14
And in addition,
1:15
you have the superior oblique muscle
1:18
and the inferior oblique muscles.
1:20
The superior oblique muscle is innervated
1:22
by cranial nerve 4,
1:25
and you have the levator palpebrae muscle,
1:28
which also is innervated by cranial nerve 3.
1:31
These are seen well on the coronal image.
1:34
The inferior oblique muscle is attaching further
1:37
inferior and posterior to this diagram.
1:42
As you see on the axial scans,
1:44
we're really only seeing the lateral rectus muscle,
1:46
again, innervated by cranial nerve 6, and the medial
1:51
rectus muscle, innervated by cranial nerve 3.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Orbit
Neuroradiology
Neuro
MRI
Head and Neck
CT
© 2024 Medality. All Rights Reserved.