Bout | No | Age | Sex | Nerve | Abnormal electrophysiological and MRI findings | ||||
---|---|---|---|---|---|---|---|---|---|
1st | 1 | 50 | F | 3rd | EOG | Contralaterally slowed adduction saccades (n) | |||
MR | Ipsilateral | 7.9 | 8.7 | 9.6 ms | |||||
Contralateral | 9.0 | 9.3 | 9.5 ms | ||||||
MRI | Periaqueductal midbrain lesion | ||||||||
1st | 2 | 30 | M | 4th | MR | Ipsilateral | 7.2 | 7.6 ms | |
Contralateral | 7.7 | 7.9 ms | |||||||
1st | 3 | 30 | F | 6th | EOG | Ipsilateral vestibular paresis (n) | |||
1st | 4 | 29 | M | 6th | EOG | Contraversive directional preponderance (n) | |||
1st | 5 | 36 | M | 6th | EOG | Saccadic pursuit eye movements (i) | |||
Optokinetic nystagmus: reduced gain of contraversive following eye movements (n) | |||||||||
MRI | Ipsilateral pontine lesion | ||||||||
1st | 6 | 33 | F | 6th | EOG | Contralaterally slowed abduction an adduction saccades (n) | |||
Optokinetic nystagmus: reduced gain of contraversive following eye movements (n) | |||||||||
MRI | Ipsilateral pontine lesion | ||||||||
1st | 7 | 19 | F | 6th | EOG | Contralaterally slowed abduction saccades (n) | |||
Hypometric contraversive saccades (i) | |||||||||
SEP | Unilaterally delayed P40 | ||||||||
1st | 8 | 25 | F | 6th | EOG | Contraversive directional preponderance (n) | |||
MRI | Ipsilateral pontine lesion | ||||||||
1st | 9 | 23 | M | 7th | EOG | Saccadic pursuit eye movements (n) | |||
1st | 10 | 24 | F | 7th | VEP | Unilateral delay | |||
1st | 11 | 30 | M | 7th | VEP | Unilateral delay | |||
1st | 12 | 24 | F | 8th vest | EOG | Ipsilaterally slowed adduction saccades (n) | |||
1st | 13 | 25 | F | 8th vest | EOG | Optokinetic nystagmus: reduced gain of ipsiversive following eye movements (n) | |||
MR | Ipsilateral | 7.8 | 5.3 ms | ||||||
Contralateral | 7.1 | 5.4 ms | |||||||
1st | 14 | 43 | F | 8th vest | MR | Ipsilateral | 7.2 | 5.9 ms | |
Contralateral | 7.7 | 7.0 ms | |||||||
2nd | 15 | 24 | F | 6th | EOG | Contralaterally slowed abduction saccades (n) | |||
2nd | 16 | 28 | F | 6th | EOG | Contralaterally slowed abduction saccades (n) | |||
MR | Ipsilateral | 7.6 | 7.5 ms | ||||||
Contralateral | 8.2 | 9.0 ms | |||||||
MRI | Ipsilateral pontine lesion | ||||||||
2nd | 17 | 30 | F | 6th | EOG | Contraversive directional preponderance (n) | |||
Ipsiversive saccadic pursuit eye movements (i) | |||||||||
2nd | 18 | 33 | F | 6th | EOG | Contralaterally slowed abduction saccades (n) | |||
Saccadic pursuit eye movements (i) | |||||||||
MR | Ipsilateral | 7.4 | 7.9 ms | ||||||
Contralateral | 6.6 | 7.1 ms | |||||||
2nd | 19 | 28 | F | 8th vest | MR | Ipsilateral | 7.4 ms | ||
Contralateral | 6.5 ms | ||||||||
2nd | 20 | 30 | M | 8th vest | MRI | Ipsilateral pontine lesion | |||
3rd | 21 | 32 | F | 6th | EOG | Ipsiversive saccadic pursuit eye movements (i) | |||
Abnormal fixation suppression of ipsiversive nystagmus (n) | |||||||||
3rd | 22 | 36 | F | 6th | EOG | Saccadic pursuit eye movements (i) | |||
Slowed contraversive saccades (n) | |||||||||
BR-R1 | Ipsilateral | 11.5 | 11.6 ms | ||||||
Contralateral | 13.5 | 12.1 ms | |||||||
3rd | 23 | 32 | F | 8th coch | EOG | Ipsilaterally slowed abduction saccades (n) | |||
Optokinetic nystagmus: reduced gain of following eye movements in both directions (i) | |||||||||
3rd | 24 | 37 | F | 8th vest | MRI | Ipsilateral pontine lesion |
8th vest = vestibular portion of the 8th nerve; 8th coch = cochlear portion of the 8th nerve; EOG = electro-oculography; MR = masseter reflex; BR-R1 = R1 component of the blink reflex; VEP = visual evoked potentials; SEP = somatosensory evoked potentials; (n) = normalisation; (i) = improvement.