vn les reflexes vestibulo-colliques. vn nerfspinal

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LES REFLEXESLES REFLEXESVESTIBULO-COLLIQUESVESTIBULO-COLLIQUES

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NerfNerfSpinalSpinal

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Voies

VESTIBULO-SPINALES

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From CONTROL OFHEAD MOVEMENTPeterson B.W and Richmond FOxford University press, 1988

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J. Neurophysiol.77:3003-3012, 1997

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Cross-striolar inhibition

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Vestibular evoked myogenic potentials in multiple sclerosis patients.

70 MS patients, retrospectively evaluated for:

possible occurrence of:

past and current brainstem and/or cerebellar symptoms or signs.

Clin Neurophysiol 2002 Sep;113(9):1464-9

Versino M, Colnaghi S, Callieco R, Bergamaschi R, Romani A, Cosi V.

RESULTS:

•VEMPs were abnormal in 31%,

•BAEPs in 38%

•SVV in 21%

•Saccadic eye movements showed a possible brainstem dysfunction in 44.4%

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Clinical study of vestibular-evoked myogenic potentials and

auditory brainstem responses in patients with brainstem lesions.

Itoh A, et al. Acta Otolaryngol Suppl 2001;545:116-9

Brainstem lesions using MRI

4 multiple sclerosis, 3 brainstem hemorrhage, 1 pontomedullary infarction, 4 Wallenberg's syndrome

Middle brainstem lesions of the pons: ABR and VEMP abnormal.

Medulla : ABR normal VEMP abnormal.

Middle-to-lower brainstem lesions:

a disappearance of VEMP, delay of PN wave, increase in PN interpeak latencydecrease in PN amplitude on the affected side

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Diagnostic value of prolonged latencies in the vestibular evoked myogenic potential.

Murofushi T, Shimizu K, Takegoshi H, Cheng PW.

Clinical records of 134 patients (61 men and 73 women, aged 20-75 years)

Diagnoses:

Meniere disease in 43 patients, Acoustic neuroma in 62 patients, Vestibular neuritis in 23 patients,Multiple sclerosis in 6 patients.

Arch Otolaryngol Head Neck Surg 2001 Sep;127(9):1069-72

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Diagnostic value of prolonged latencies in the vestibular evoked myogenic potential.

Murofushi T, Shimizu K, Takegoshi H, Cheng PW.

VEMP were absent or decreased in

51% of patients with Meniere disease

39% with vestibular neuritis

77% with acoustic neuroma

25% with multiple sclerosis

Arch Otolaryngol Head Neck Surg 2001 Sep;127(9):1069-72

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Diagnostic value of prolonged latencies in the vestibular evoked myogenic potential.

Murofushi T, Shimizu K, Takegoshi H, Cheng PW.

Concerning latency,

Meniere disease or vestibular neuritis: no latency prolongation.

4 patients with acoustic neuroma showed prolonged p13 all had large tumors.

All patients with multiple sclerosis showed prolonged p13.

CONCLUSIONS:

Prolonged latencies of the VEMP suggest lesions in the retrolabyrinthine, especially in the vestibulospinal tract.

Arch Otolaryngol Head Neck Surg 2001 Sep;127(9):1069-72

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Vestibular evoked myogenic potentials in multiple sclerosis.

Shimizu K, Murofushi T, Sakurai M, Halmagyi M.

J Neurol Neurosurg Psychiatry 2000 Aug;69(2):276-7

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