Skip to main navigation Skip to main content Skip to page footer
Menu

OCULOMOTOR & BALANCE LAB

Oculomotor and Balance Laboratory

 

Head:

Evangelos Anagnostou, MD, PhD (Associate Professor of Neurology)

 

Members of the Lab:

Athina Zachou, MD (Neurologist)

Georgios Armenis, MD (Neurologist)

Michalis Tzortzakakis, MD (Resident in Neurology)

Maria Kouvli, MD (Resident in Neurology)

Ioannis Stamelos, MD (about to begin Residency in Neurology)

Akis Stavropoulos (Research Fellow, NYU Center for Neural Science, New York, USA) Maria Skoularidou (Postdoctoral Fellow, EWSC, The Broad Institute of M.I.T. and Harvard)


Research activity:

  1. Neurophysiology of normal and abnormal eye movements
  2. Physiology and pathophysiology of the vestibular system
  3. Balance and disorders of upright stance
  4. Study and follow-up of patients with cerebellar disorders
  5. Study and follow-up of vertigo patients

 

Electrophysiological equipment

  • Binocular video-oculography and visual stimulus presentation set-up at 100 Hz sampling rate (for each eye) (Visual Eyes 525, Interacoustics, Denmark)
  • Two set-ups of  infrared reflection eye movement recording devices (Iris, Skalar, Delft / Netherlands) using external National Instruments A/D cards with 500 Hz sampling rates
  • Video-oculography and video head impulse testing with a gyroscope and a 220 Hz lightweight camera (EyeSeeCam, Interacoustics, Denmark) 
  • Static posturographic force platform (Synapsys, France)
  • Warm and cold air calorics ((Kaloristar, Biomed, Jena)
  • Subjective visual vertical set-up (Synapsys, France)
  • Pupillometry device (Eye Tribe, Copenhagen)

 

 

Representative peer-reviewed articles on eye movement and vestibular physiology and disorders

(complete list in  www.ncbi.nlm.nih.gov/pubmed/)

  • Skrandies W, Anagnostou E. Electroencephalographic cortical oscillations and saccadic eye movements in humans. Neurosci Lett 1999;261:57-60.
  • Anagnostou E, Kleiser R, Skrandies W. Electrophysiological correlates of human intrasaccadic processing. Experimental Brain Research 2000;130: 177-187.  
  • Anagnostou E, Skrandies W. Effects of temporal gaps between successive fixation targets on discrimination performance and evoked brain activity. Neuroscience Research 2001;40: 367-374.  
  • Siebold C, Anagnostou E, Glasauer S, Glonti L, Kleine JF, Tchelidze T, Buttner U. Canal-otolith interaction in the fastigial nucleus of the alert monkey. Experimental Brain Research 2001;136: 169-178.  
  • Anagnostou E. On absence seizures and oculomotor phenomena. Clinical Neurophysiology 2001;112: 563-564.  
  • Anagnostou E, Sporer B, Steude U, Kempermann, U, Buttner, U, Bötzel K. Contraversive eye deviation during deep brain stimulation of the globus pallidus internus. Neurology 2001;56: 1396-1399.  
  • Anagnostou E, Mandellos D, Limbitaki G, Papadimitriou A, Anastasopoulos D.

Positional nystagmus and vertigo due to a solitary brachium conjunctivum plaque.

Journal of Neurology Neurosurgery and Psychiatry 2006;77: 790-792.  

  • Anagnostou E, Papageorgiou SG, Potagas C, Alexakis T, Kalfakis N, Anastasopoulos D. Square-wave jerks and smooth pursuit impairment as subtle early signs of brain involvement Langerhans’ cell histiocytosis. Clinical Neurology and Neurosurgery 2008;110:286-290.  
  • Christakos CN, Erimaki S, Anagnostou E, Anastasopoulos D. Tremor-related motor unit firing in Parkinson’s disease: implications for tremor genesis. Journal of Physiology 2009; 587:4811-4827. 
  • Anagnostou E, Spengos K, Margeti S, Vassilopoulou S, Paraskevas GP, Zis V. Vertical and horizontal integrator failure in a ponto-medullary infarction: a possible role for paramedian tract neurons. Journal of the Neurological Sciences 2009;280:118-119.  
  • Anagnostou E, Spengos K, Vassilopoulou S, Paraskevas GP, Zis V, Vassilopoulos D. Incidence of rotational vertigo in supratentorial stroke: A prospective analysis of 112 consecutive cases. Journal of the Neurological Sciences 2010; 290:33-36.  
  • Anagnostou E, Heimberger J, Sklavos S, Anastasopoulos D. Alexander’s law during high acceleration head rotations in humans. Neuroreport 2011;22:239-243. E. 
  • Anagnostou E, Spengos K, Anastasopoulos D. Single-plane compensatory phase shift of head and eye oscillations in infantile nystagmus syndrome. Journal of the Neurological Sciences 2011;308:182-185.  
  • Anagnostou E, Kouzi I, Vassilopoulou S, Paraskevas GP, Spengos K. Spontaneous eyeblink rate in focal cerebrovascular lesions. European Neurology 2012;67:39-44.  
  • Anagnostou E, Kararizou E, Evdokimidis I. Ocular flutter in essential tremor: clinical course and response to primidone. J Neurol 2013;260:2672-2674.  
  • Anagnostou E, Stamboulis E, Kararizou E. Canal conversion after repositioning procedures: comparison of Semont and Epley maneuver. J Neurol 2014;261:866869.  
  • Anagnostou E, Kemanetzoglou E, Papadimas G, Kararizou E, Evdokimidis I. Extraocular muscle function in adult-onset Pompe disease tested by saccadic eye movements. Neuromusc Disord 2014;24:1073-1078.  
  • Anagnostou E, Kouzi I, Spengos K. Diagnosis and treatment of anterior canal benign paroxysmal positional vertigo: a systematic review. J Clin Neurol 2015;11:262-267. 
  • Brokalaki Ch, Kararizou E, Dimitrakopoulos A, Evdokimidis I, Anagnostou E. Squarewave ocular oscillation and ataxia in an anti-GAD positive individual with simultaneous-onset hypothyreoidism. J Neuroophthalmol 2015;35:390-395.  
  • Anagnostou E, Katsika P, Kemanetzoglou E, Vassilopoulou S, Spengos K. The abduction deficit of functional convergence spasm. J Neurol Sci 2016;363:27-28.
  • Anagnostou E, Koutsoudaki P, Stavropoulos A, Evdokimidis I. Effect of common antivertiginous agents on the high velocity vestibulo-ocular reflex.Clin Neurophysiol 2017;128:2211-2216.
  • Anagnostou E, Papadimas G, Rentzos M, Zambelis T. Downbeat nystagmus and lower motor neuron disease: 14 years follow-up. J Neurol. 2018;265:714-716.
  • Breza M, Smyrni N, Koutsis G, Anagnostou E, Tzartos J, Velonakis G, Kokkinis C, Kilindireas C, Papavasiliou A, Kotsalis C. Ocular flutter as presenting manifestation of pediatric MOG antibody-associated demyelination: A Case Report. Mult Scler 2019;25:122-125.
  • Anagnostou E, Skarlatou V, Mergner T, Anastasopoulos D. Idiothetic signal processing and spatial orientation in patients with unilateral hippocampal sclerosis. J Neurophysiol 2018;120:1256-1263.
  • Anagnostou E, Gerakoulis S, Voskou P, Kararizou E. Postural instability during attacks of migraine without aura. Eur J Neurol 2019;26:319-e21.
  • Anagnostou E, Zachou A, Breza M, Kladi A, Karadima G, Koutsis G. Disentangling balance impairments in spinal and bulbar muscular atrophy. Neurosci Lett. 2019;705:94-98. 
  • Anagnostou E, Zachou A, Kararizou E. Skew deviation after blunt head trauma. Rev Neurol 2020;176:399-401. 
  • Anagnostou E, Karavasilis E, Potiri I, Constantinides V, Efstathopoulos E, Kapaki E, Potagas C. A cortical substrate for square wave jerks in Progressive Supranuclear Palsy. J Clin Neurol 2020;16:37-45.
  • Zachou A, Anagnostou E. Diagnostic value of key signs in persistent posturalperceptual dizziness. J Neurol 2020;267:1846-1848
  • Anagnostou E, Koutsoudaki P, Tountopoulou A, Spengos K, Vassilopoulou S. Bedside assessment of vergence in stroke patients. J Neuroophthalmol 2021;41:424-430.
  • Anagnostou E, Xirou S, Kararizou E, Stefanis L, Papadopoulos C, Papadimas G.

Preserved eye movements in adults with spinal muscular atrophy. Muscle Nerve. 2021; 63:765-769.

  • Daponte A, Constantinides VC, Anagnostou E, Boufidou F, Paraskevas GP, Stefanis L, Kapaki E. Ocular flutter as the cardinal feature of anti-GM2 rhombencephalitis. Neurol Sci 2021;42:3003-3005.
  • Kontogeorgiou Ζ, Kartanou C, Tsirligkani C, Anagnostou E, Rentzos M, Karadima G, Georgios Koutsis G. Biallelic RFC1 pentanucleotide repeat expansions in Greek patients with late-onset ataxia. Clin Genet 2021:100:90-94.
  • Anagnostou E, Stavropoulou G, Zachou A, Kararizou E. Spectral composition of body sway in persistent postural-perceptual dizziness. Otol Neurotol 2021;42: e1318e1326.
  • Karamtiros A, Kalamatianos T, Stranjalis G, Anagnostou E. Vestibular paroxysmia: Clinical features and imaging findings; a literature review. J Neuroradiol 2022;49:225-233.
  • Anagnostou E, Karathanasis D, Evangelopoulos ME. The Heiman-Bielschowsky phenomenon after optic neuritis. Mult Scler Relat Disord 2022 in press doi:10.1016/j.msard.2022.103523;
  • Zachou A, Palaiologou D, Kanavakis E, Anagnostou E. Retrocollis as the cardinal feature in a de novo ITPR1 variant. Brain Dev 2022;44:347-352.

doi:10.1016/j.braindev.2022.01.005 

  • Anagnostou E, Karagianni E, Skoularidou M. Joint entropy analysis of anteriorposterior and medial-lateral body sway.
  • Armenis G, Zachou A, Anagnostou E. Slow stepping rate in the Unterberger test in persistent postural-perceptual dizziness.
  • Anagnostou E, Armenis G, Zachou A, Kouzi I. Contraversive saccadic hypermetria and ipsilateral limb ataxia: the brachium conjunctivum syndrome. J Neurol 2023; doi:

10.1007/s00415-023-11598-1, in press.

  • Armenis G, Velonakis G, Zachou A, Anagnostou E. Congenital Periodic Alternating

Nystagmus in Hypoplasia of the Cerebellar Nodulus and Tonsil. J Neuroophthalmol 2023; online ahead of print

  • Anagnostou E, Gerakoulis S, Armenis G, Zachou A, Velonakis G. Monocular Torsional Oscillopsia in Dentato-olivary Disconnection. Cerebellum 2023. doi:

10.1007/s12311-023-01626-1. Online ahead of print

  • Zachou A, Armenis G, Stamelos I, Stratigakou-Polychronaki E, Athanasopoulos F, Anagnostou E. Clinical utility of square-wave jerks in neurology and psychiatry. Front Ophthalmol 2024; p 1-8, doi: doi.org/10.3389/fopht.2023.1302651.  

1ST DEPARTMENT OF NEUROLOGY: