Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
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
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