G Michael Halmagyi

Summary

Affiliation: University of Sydney
Country: Australia

Publications

  1. ncbi request reprint Impulsive testing of individual semicircular canal function
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown NSW, Sydney, Australia
    Ann N Y Acad Sci 942:192-200. 2001
  2. ncbi request reprint Inferior vestibular neuritis
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Sydney, Australia
    Ann N Y Acad Sci 956:306-13. 2002
  3. ncbi request reprint Vergence-mediated changes in the axis of eye rotation during the human vestibulo-ocular reflex can occur independent of eye position
    Americo A Migliaccio
    Eye and Ear Research Unit, Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, Australia
    Exp Brain Res 151:238-48. 2003
  4. ncbi request reprint The human horizontal vestibulo-ocular reflex in response to active and passive head impulses after unilateral vestibular deafferentation
    G M Halmagyi
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Ann N Y Acad Sci 1004:325-36. 2003
  5. ncbi request reprint Upbeat about downbeat nystagmus
    G Michael Halmagyi
    Neurology 63:606-7. 2004
  6. ncbi request reprint Garnett Passe and Rodney Williams Memorial Lecture: New clinical tests of unilateral vestibular dysfunction
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown NSW 2050, Sydney, Australia
    J Laryngol Otol 118:589-600. 2004
  7. doi request reprint Vestibular function after acute vestibular neuritis
    G M Halmagyi
    Department of Neurology, Royal Prince Alfred Hospital, Camperdown NSW 2050, Sydney, NSW, Australia
    Restor Neurol Neurosci 28:37-46. 2010
  8. ncbi request reprint Superior semicircular canal dehiscence simulating otosclerosis
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Sydney, and the Otolaryngology Department, St Vincent s Hospital, Sydney, Australia
    J Laryngol Otol 117:553-7. 2003
  9. doi request reprint Impulsive testing of semicircular canal function
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, Sydney, NSW, Australia
    Prog Brain Res 171:187-94. 2008
  10. ncbi request reprint The click-evoked vestibulo-ocular reflex in superior semicircular canal dehiscence
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Neurology 60:1172-5. 2003

Collaborators

Detail Information

Publications41

  1. ncbi request reprint Impulsive testing of individual semicircular canal function
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown NSW, Sydney, Australia
    Ann N Y Acad Sci 942:192-200. 2001
    ....
  2. ncbi request reprint Inferior vestibular neuritis
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Sydney, Australia
    Ann N Y Acad Sci 956:306-13. 2002
    ....
  3. ncbi request reprint Vergence-mediated changes in the axis of eye rotation during the human vestibulo-ocular reflex can occur independent of eye position
    Americo A Migliaccio
    Eye and Ear Research Unit, Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Sydney, Australia
    Exp Brain Res 151:238-48. 2003
    ..5 g and may have contributed to the increased torsional component observed during near viewing. Our data show that vergence-mediated eye movements obey a VOR/Listing's Law compromise strategy independent of the initial eye position...
  4. ncbi request reprint The human horizontal vestibulo-ocular reflex in response to active and passive head impulses after unilateral vestibular deafferentation
    G M Halmagyi
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Ann N Y Acad Sci 1004:325-36. 2003
    ..After 75 ms, rapid corrective eye movements often were generated to reduce any remaining gaze error...
  5. ncbi request reprint Upbeat about downbeat nystagmus
    G Michael Halmagyi
    Neurology 63:606-7. 2004
  6. ncbi request reprint Garnett Passe and Rodney Williams Memorial Lecture: New clinical tests of unilateral vestibular dysfunction
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown NSW 2050, Sydney, Australia
    J Laryngol Otol 118:589-600. 2004
    ..The physiological rationale of these three tests is reviewed as well as the interpretation of their results in various diseases...
  7. doi request reprint Vestibular function after acute vestibular neuritis
    G M Halmagyi
    Department of Neurology, Royal Prince Alfred Hospital, Camperdown NSW 2050, Sydney, NSW, Australia
    Restor Neurol Neurosci 28:37-46. 2010
    ..To review the extent and mechanism of the recovery of vestibular function after sudden, isolated, spontaneous, unilateral loss of most or all peripheral vestibular function - usually called acute vestibular neuritis...
  8. ncbi request reprint Superior semicircular canal dehiscence simulating otosclerosis
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Sydney, and the Otolaryngology Department, St Vincent s Hospital, Sydney, Australia
    J Laryngol Otol 117:553-7. 2003
    ....
  9. doi request reprint Impulsive testing of semicircular canal function
    G Michael Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, Sydney, NSW, Australia
    Prog Brain Res 171:187-94. 2008
    ..For the clinician, impulsive testing is an easy and reliable way to identify severe unilateral as well as bilateral impairment of semicircular canal function...
  10. ncbi request reprint The click-evoked vestibulo-ocular reflex in superior semicircular canal dehiscence
    G M Halmagyi
    Neurology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Neurology 60:1172-5. 2003
    ..Normal subjects had responses that were at least 10 times smaller. The click-evoked vestibulo-ocular reflex test is a simple, robust way to screen dizzy patients for symptomatic superior semicircular dehiscence...
  11. doi request reprint Augmented ocular vestibular evoked myogenic potentials to air-conducted sound in large vestibular aqueduct syndrome
    Rachael L Taylor
    Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Central Clinical School, University of Sydney, NSW, Australia
    Ear Hear 33:768-71. 2012
    ..To demonstrate the value of recording air-conducted ocular Vestibular Evoked Myogenic Potentials (oVEMP) in a patient with bilaterally enlarged vestibular aqueducts...
  12. ncbi request reprint Latency and initiation of the human vestibuloocular reflex to pulsed galvanic stimulation
    Swee T Aw
    Neurology Department, Royal Prince Alfred Hospital, Camperdown NSW 2050, Sydney, Australia
    J Neurophysiol 96:925-30. 2006
    ..Pulsed GVS is a promising technique to investigate latency and initiation of the human vestibuloocular reflex because it does not require a large mechanical apparatus nor does it pose problems of head inertia or slippage...
  13. doi request reprint Inter-ocular differences of the horizontal vestibulo-ocular reflex during impulsive testing
    Konrad P Weber
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Prog Brain Res 171:195-8. 2008
    ..3%. If only the abducting eye was analysed, VOR gains were symmetrical in both directions. For accurate measurements of the VOR at high accelerations, the inter-ocular VOR gain differences require binocular recording...
  14. ncbi request reprint The active head-impulse test in unilateral peripheral vestibulopathy
    Ross A Black
    Department of Neurology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Sydney, Australia
    Arch Neurol 62:290-3. 2005
    ..The head-impulse test, which is sensitive and specific for detecting severe unilateral peripheral vestibulopathy, is an accepted part of the neurological examination, especially in patients with vertigo and balance disorders...
  15. pmc A mathematical model of human semicircular canal geometry: a new basis for interpreting vestibular physiology
    Andrew P Bradshaw
    School of Electrical Engineering, The University of New South Wales, Sydney, Australia
    J Assoc Res Otolaryngol 11:145-59. 2010
    ..Finally, we mathematically model SCC geometry using Fourier series equations. This work has the potential to reinterpret physiology and pathophysiology in terms of real individual 3D morphology...
  16. doi request reprint Galvanic ocular vestibular evoked myogenic potentials provide new insight into vestibulo-ocular reflexes and unilateral vestibular loss
    Sally M Rosengren
    Prince of Wales Clinical School and Medical Research Institute, University of New South Wales, Randwick, Sydney, NSW 2031, Australia
    Clin Neurophysiol 120:569-80. 2009
    ..As galvanic vestibular stimulation (GVS) evokes the vestibulo-ocular reflex, we wished to investigate GVS-evoked OVEMPs...
  17. ncbi request reprint Vibration-induced ocular torsion and nystagmus after unilateral vestibular deafferentation
    Mikael Karlberg
    Neuro Otology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Brain 126:956-64. 2003
    ....
  18. doi request reprint Impulsive testing of semicircular-canal function using video-oculography
    Konrad P Weber
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Ann N Y Acad Sci 1164:486-91. 2009
    ..This system is easy to use in a clinical setting, provides an objective measure of the vestibulo-ocular reflex (VOR), and detects both overt and covert catch-up saccades in patients with vestibular loss...
  19. ncbi request reprint Cerebellar ataxia with bilateral vestibulopathy: description of a syndrome and its characteristic clinical sign
    Americo A Migliaccio
    Neurology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Brain 127:280-93. 2004
    ..1 to 1.0 Hz, eye velocity failed to match head velocity, gaze velocity increased, and gaze position errors developed, which were corrected with bursts of saccades, the basis of the clinical sign of an impaired VVOR...
  20. pmc Enhanced vestibulo-ocular reflex to electrical vestibular stimulation in Meniere's disease
    Swee T Aw
    Central Clinical School, Faculty of Medicine, University of Sydney, Sydney, Australia
    J Assoc Res Otolaryngol 14:49-59. 2013
    ..These eVOR abnormalities may be a diagnostic indicator of Meniere's disease and may explain the vertigo attacks in the presence of declining mechanically evoked vestibular responses...
  21. doi request reprint The vestibular evoked-potential profile of Ménière's disease
    Rachael L Taylor
    Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Central Clinical School, University of Sydney, NSW, Australia
    Clin Neurophysiol 122:1256-63. 2011
    ....
  22. doi request reprint Three-dimensional kinematics of saccadic eye movements in humans with cerebellar degeneration
    Matthew J Thurtell
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
    Prog Brain Res 171:215-8. 2008
    ..Our findings suggest that the cerebellum does not encode eye velocity axis tilting during saccades, further supporting the notion that these phenomena arise due to the effects of muscle pulleys...
  23. ncbi request reprint MRI of the vestibular nerve after selective vestibular neurectomy
    Swee T Aw
    Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Acta Otolaryngol 126:1053-6. 2006
    ..In patients with Ménière's disease and persisting vertigo attacks after vestibular neurectomy (VNx) MRI of the vestibulocochlear nerve can identify residual vestibular nerve fibres that could be responsible for the vertigo attacks...
  24. ncbi request reprint Vergence-mediated changes in Listing's plane do not occur in an eye with superior oblique palsy
    Americo A Migliaccio
    Neurology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Invest Ophthalmol Vis Sci 45:3043-7. 2004
    ....
  25. ncbi request reprint Head impulse test reveals residual semicircular canal function after vestibular neurectomy
    Nadine Lehnen
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Neurology 62:2294-6. 2004
    ..The control patients had no residual canal function. Thus, residual vestibular function on the ipsilesional side may cause vertiginous Meniere attacks...
  26. doi request reprint Teaching NeuroImage: Convergence spasm associated with midbrain compression by cerebral aneurysm
    Konrad P Weber
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    Neurology 70:e49-50. 2008
  27. doi request reprint Application of the video head impulse test to detect vertical semicircular canal dysfunction
    Hamish G Macdougall
    Vestibular Research Laboratory, School of Psychology, University of Sydney, Sydney, Australia
    Otol Neurotol 34:974-9. 2013
    ..However, so far, vHIT has been limited to measurement of the function of the horizontal semicircular canals. The goal of this study was to determine if vHIT can detect vertical semicircular canal dysfunction...
  28. ncbi request reprint Gentamicin ototoxicity: a 23-year selected case series of 103 patients
    Rebekah M Ahmed
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, NSW
    Med J Aust 196:701-4. 2012
    ..To review patients with severe bilateral vestibular loss associated with gentamicin treatment in hospital...
  29. ncbi request reprint Practical neurology--4: Dizziness on head movement
    Miriam S Welgampola
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, NSW
    Med J Aust 195:518-22. 2011
    ..In over 80% of patients, BPV can be treated successfully with a single bedside Epley (particle-repositioning) manoeuvre, which can be performed by any medical practitioner...
  30. ncbi request reprint A 93 year old man with an unusual kyphosis: question & answer
    Matthew J Thurtell
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
    J Clin Neurosci 15:697; discussion 724. 2008
  31. doi request reprint Unilateral vestibular loss due to systemically administered gentamicin
    Rebekah M Ahmed
    Neurology Department, Royal Prince Alfred Hospital, Sydney, Australia
    Otol Neurotol 32:1158-62. 2011
    ..To report the little known fact that systemically administered gentamicin can cause severe unilateral, rather than only bilateral vestibular loss...
  32. doi request reprint Complete ophthalmoplegia: an unusual sign of bilateral paramedian midbrain-thalamic infarction
    Matthew J Thurtell
    Department of Neurology, Royal Prince Alfred Hospital, Missenden Road, Camperdown NSW 2050, Australia
    Stroke 39:1355-7. 2008
    ..Two patients died, with the ophthalmoplegia remaining unchanged before death. The surviving patient had a progressive improvement in ocular abduction but persisting third nerve and vertical gaze palsies...
  33. ncbi request reprint Teaching video NeuroImage: acquired or congenital gaze-evoked nystagmus?
    Matthew J Thurtell
    Department of Neurology, Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, University of Sydney, Australia
    Neurology 70:e96. 2008
  34. doi request reprint Venous hypertension as the cause of intracranial hypertension in patients with transverse sinus dural arteriovenous fistula
    Rebekah M Ahmed
    Department of Neurology, Royal Prince Alfred Hospital, Camperdown, Sydney, Australia
    J Neuroophthalmol 33:102-5. 2013
    ..The data from our patients support this hypothesis. An additional factor leading to intracranial hypertension could be stenosis of the fellow transverse sinus...
  35. doi request reprint Spinal leptomeningeal lymphoma presenting as pseudotumor syndrome
    Rebekah M Ahmed
    Department of Neurology, Royal Prince Alfred Hospital, Sydney, Australia
    J Neuroophthalmol 33:13-6. 2013
    ..Neither had, at any time, any clinical signs of a spinal cord or root lesion. We discuss the possible implications of these observations regarding the diagnosis and mechanism of the pseudotumor syndrome...
  36. ncbi request reprint Vibration-induced shift of the subjective visual horizontal: a sign of unilateral vestibular deficit
    Mikael Karlberg
    Department of Neuro otolgy, Royal Prince Alfred Hospital, Sydney, Australia
    Arch Otolaryngol Head Neck Surg 128:21-7. 2002
    ..Vibration to the head or neck excites vestibular and neck muscle spindle afferents. Can such vibrations improve the sensitivity of the subjective visual horizontal (SVH) test to chronic unilateral deficit of the vestibular system?..
  37. ncbi request reprint Sway patterns in a case of orthostatic tremor responsive to alcohol
    Ann M Bacsi
    Institute of Neurological Sciences and UNSW Clinical School, Prince of Wales Hospital, Sydney, Australia
    Mov Disord 19:1459-63. 2004
    ..Despite these findings, sway remained greater than controls. OT thus may show functionally important alcohol responsiveness...
  38. ncbi request reprint Isolated lateropulsion in acute lateral medullary infarction
    Gulden Akdal
    Neurology Department, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Sydney, Australia
    Arch Neurol 64:1542-3. 2007
  39. doi request reprint Sylvian aqueduct syndrome with slit ventricles in shunted hydrocephalus due to adult aqueduct stenosis
    Helen Maroulis
    Department of Neurosurgery, Royal North Shore Hospital, Sydney, Australia
    J Neurosurg 109:939-43. 2008
    ..The authors propose a simple management plan for patients with shunted hydrocephalus who develop SAS...
  40. ncbi request reprint Benign paroxysmal positional vertigo can interfere with the cardiac response to head-down tilt
    Kathrine Jáuregui-Renaud
    Unidad de Investigación Médica HG CMN La Raza, Instituto Mexicano del Seguro Social, Mexico City, Mexico
    Otol Neurotol 26:484-8. 2005
    ..To assess the pulse rate and the respiratory rate responses to head-down tilt of the whole body in the plane of the posterior canals in healthy subjects and in patients with benign paroxysmal positional vertigo (BPPV)...
  41. doi request reprint Pituitary apoplexy causing isolated blindness after cardiac bypass surgery
    Matthew J Thurtell
    Arch Ophthalmol 126:576-8. 2008