Since superior oblique myokymia (SOM) was named by Hoyt and Kaene [
[1]
], several etiologies of this abnormal intermittent contraction of the superior oblique
muscle have been reported including trauma, tumor, multiple sclerosis in the brainstem,
and vascular compression of the trochlear nerve [
1
,
2
,
3
,
4
]. Compression of the trochlear nerve at the root exit zone (REZ) with resultant focal
demyelination is one of the hypotheses for SOM [
4
,
5
,
6
]. Flow Imaging Employing Steady sTate Acquisition (FIESTA) is a useful magnetic resonance
imaging (MRI) sequence for revealing the arterial-cranial nerve contact and the brainstem
in more detail [
7
,
8
,
9
]. The abnormal eye movements in SOM may be occasional or too subtle to be recognized
during routine eye inspections. Therefore, the recording of torsional eye movements
with the three dimensional video-oculography (3D-VOG) can be a useful method demonstrating
occasional oscillations of the eye in SOM.Keywords
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References
- Superior oblique myokymia. Report and discussion on five cases of benign intermittent uniocular microtremor.Arch. Ophthalmol. 1970; 84: 461-467
- The Neurology of eye Movements.fifth ed. Oxford University Press, New York2015
- Superior oblique myokymia associated with a posterior fossa tumor: oculographic correlation with an idiopathic case.Neurology. 1990; 40: 367-370
- Microvascular decompression for superior oblique myokymia: case report.Br. J. Neurosurg. 2014; 28: 552-555
- Superior oblique myokymia: magnetic resonance imaging support for the neurovascular compression hypothesis.Ann. Neurol. 2002; 51: 361-368
- The central-peripheral transitional regions of cranial nerves. Trochlear and abducent nerves.J. Anat. 1988; : 161115-161123
- MR anatomy of the proximal cisternal segment of the trochlear nerve: neurovascular relationships and landmarks.Radiology. 2002; 223: 31-38
- Vascular compression as a cause of superior oblique myokymia disclosed by thin-slice magnetic resonance imaging.Am J. Ophthalmol. 2001; 131: 676-677
- Mystery case: superior oblique myokymia due to vascular compression of the trochlear nerve.Neurology. 2013; 80: e134-e135
- Superior oblique myokymia: quantitative description of the eye movement.Neurology. 1991; 41: 1679-1681
Article info
Publication history
Published online: April 26, 2017
Accepted:
April 25,
2017
Received in revised form:
April 24,
2017
Received:
September 13,
2016
Identification
Copyright
© 2017 Elsevier B.V. All rights reserved.
