Persistent geotropic direction‐changing positional nystagmus with a null plane: The light cupula

2013 ◽  
Vol 124 (1) ◽  
pp. E15-E19 ◽  
Author(s):  
Chang‐Hee Kim ◽  
Min‐Beom Kim ◽  
Jae Ho Ban
Keyword(s):  
Positional Nystagmus ◽  
Null Plane ◽  
Light Cupula

scholarly journals Differences in the Head Roll Test, Bow and Lean Test, and Null Plane between Persistent and Transient Geotropic Direction-Changing Positional Nystagmus

2019 ◽  
Vol 9 (1) ◽  
pp. 73
Author(s):  
Sung Kyun Kim ◽  
Sung Won Li ◽  
Seok Min Hong
Keyword(s):  
Head Rotation ◽  
Positional Nystagmus ◽  
Anatomical Position ◽  
Lesion Side ◽  
Null Plane ◽  
Head Roll ◽  
Relationship Of ◽  
The Relationship ◽  
Underlying Pathogenesis

Background: Persistent geotropic direction-changing positional nystagmus (DCPN) has the characteristics of cupulopathy, but its underlying pathogenesis is not known. We investigated the relationship of the results of the head roll test, bow and lean test, and side of the null plane between persistent and transient geotropic DCPN to determine the lesion side of persistent geotropic DCPN and understand its mechanism. Methods: We enrolled 25 patients with persistent geotropic DCPN and 41 with transient geotropic DCPN. We compared the results of the head roll test, bow and lean test, and side of the null plane between the two groups. Results: The rates of bowing and leaning nystagmus were significantly higher in the persistent DCPN group. Only 16.0% of the persistent DCPN patients had stronger nystagmus in the head roll test and the null plane on the same side. The rates of the direction of bowing nystagmus in the bow and lean test and stronger nystagmus in the head roll test on the same side were also significantly lower in persistent DCPN than in transient DCPN. Conclusion: It was difficult to determine the lesion side in persistent geotropic DCPN using the direction of stronger nystagmus in the head roll test and null plane when the direction of the stronger nystagmus and null plane were opposite. Further study is needed to understand the position of the cupula according to head rotation and the anatomical position in persistent geotropic DCPN.

scholarly journals Clinical Findings in Patients With Persistent Positional Nystagmus: The Designation of “Heavy and Light Cupula”

2019 ◽  
Vol 10 ◽  
Author(s):  
Xiaowu Tang ◽  
Qiuhong Huang ◽  
Ling Chen ◽  
Peng Liu ◽  
Tianci Feng ◽  
...  
Keyword(s):  
Clinical Findings ◽  
Positional Nystagmus ◽  
Light Cupula

Clinical course of persistent geotropic direction-changing positional nystagmus with neutral position—Light cupula

2015 ◽  
Vol 136 (1) ◽  
pp. 34-37 ◽  
Author(s):  
Toru Seo ◽  
Ko Shiraishi ◽  
Takaaki Kobayashi ◽  
Kitano Mutsukazu ◽  
Katsumi Doi
Keyword(s):  
Clinical Course ◽  
Neutral Position ◽  
Positional Nystagmus ◽  
Light Cupula

scholarly journals Intractable Persistent Direction-Changing Geotropic Nystagmus Improved by Lateral Semicircular Canal Plugging

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
Toru Seo ◽  
Kazuya Saito ◽  
Katsumi Doi
Keyword(s):  
Hearing Loss ◽  
Supine Position ◽  
Semicircular Canal ◽  
Sudden Hearing Loss ◽  
Neutral Point ◽  
Positional Nystagmus ◽  
Lateral Semicircular Canal ◽  
Positional Vertigo ◽  
Light Cupula ◽  
The Right

Antigravitational deviation of the cupula of the lateral semicircular canal, which is also called light cupula, evokes persistent direction-changing geotropic nystagmus with a neutral point. No intractable cases of this condition have been reported. In our case, a 67-year-old man complained of positional vertigo 3 months after developing idiopathic sudden hearing loss in the right ear with vertigo. He showed a persistent direction-changing geotropic nystagmus with a leftward beating nystagmus in the supine position. The nystagmus resolved when his head was turned approximately 30° to the right. He was diagnosed with light cupula of the right lateral semicircular canal and was subsequently treated with an antivertiginous agent. However, his symptoms and positional nystagmus did not improve, so the right lateral semicircular canal was plugged by surgery. One month after surgery, his positional vertigo and nystagmus were completely resolved. We speculated that the cause of the patient’s intractable light cupula was an enlarged cupula caused by his idiopathic sudden hearing loss.

scholarly journals Light cupula: the pathophysiological basis of persistent geotropic positional nystagmus

BMJ Open ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. e006607-e006607 ◽  
Author(s):  
T. Imai ◽  
K. Matsuda ◽  
N. Takeda ◽  
A. Uno ◽  
T. Kitahara ◽  
...  
Keyword(s):  
Positional Nystagmus ◽  
Light Cupula

Persistent geotropic positional nystagmus after meningitis: Evidence for light cupula

2017 ◽  
Vol 379 ◽  
pp. 279-280 ◽  
Author(s):  
Jeong-Yoon Choi ◽  
Eek-Sung Lee ◽  
Hyo-Jung Kim ◽  
Ji-Soo Kim
Keyword(s):  
Positional Nystagmus ◽  
Light Cupula

scholarly journals Persistent Down-Beating Torsional Positional Nystagmus: Posterior Semicircular Canal Light Cupula?

2016 ◽  
Vol 2016 ◽  
pp. 1-3 ◽  
Author(s):  
Akihide Ichimura ◽  
Koji Otsuka
Keyword(s):  
Supine Position ◽  
Semicircular Canal ◽  
Sitting Position ◽  
Positional Nystagmus ◽  
Posterior Semicircular Canal ◽  
Positional Vertigo ◽  
Light Cupula ◽  
Lying Down

A 16-year-old boy with rotatory positional vertigo and nausea, particularly when lying down, visited our clinic. Initially, we observed vertical/torsional (downward/leftward) nystagmus in the supine position, and it did not diminish. In the sitting position, nystagmus was not provoked. Neurological examinations were normal. We speculated that persistent torsional down-beating nystagmus was caused by the light cupula of the posterior semicircular canal. This case provides novel insights into the light cupula pathophysiology.

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