Peka Savayan

Peka Christova Savayan, PhD

Assistant Professor, PhD, Dept. of Neuroscience, University of Minnesota

savay001@umn.edu

Education
MS - Physics, Sofia University, Sofia, Bulgaria

PhD - Neurophysiology, Bulgarian Academy of Sciences, Bulgaria, 

Post-Doctoral - Neurophysiology, University of Minnesota

Specialties
Neurophysiology of motor control, Functional MRI of cognitive processes

Selected publications

  • 39. Christova P, James LM, Engdahl BE, Lewis SM, Georgopoulos AP (2015) Diagnosis of Posttraumatic Stress Disorder (PTSD) Based on Correlations of Prewhitened fMRI Data. Exp Brain Res 233, 2695-2705 doi: 10.1007/s00221-015-4339-0
  • 38. Sakellaridi S, Christova P, Leuthold A, Peponis J, Georgopoulos AP (2015) Neural Mechanisms Underlying the Exploration of Small City Maps Using Magnetoencephalography. Exp Brain Res 233, 3187-3200 doi: 10.1007/s00221-015-4387-5
  • 37. Sakellaridi S, Christova P, Christopoulos VN, Peponis J, Georgopoulos AP (2015) Cognitive Mechanisms Underlying Instructed Choice Exploration of Small City Maps. Frontiers in Neuroscience, 9, article 60, doi:10.3389/fnins.2015.00060
  • 36. Christova P (2014) Innovations in Resting-state fMRI and MEG. Asian J Phys 23, 5, 849-857
  • 35. Christova P, Scoppa M, Peponis J, Georgopoulos AP (2012) Exploring Small City Map. Exp Brain Res 223, 207–217, doi: 10.1007/s00221-012-3252-z IF 3.288
  • 34. Lewis SM, Christova P, Jerde TA, Georgopoulos AP (2012) A compact and realistic cerebral cortical layout derived from prewhitened resting-stat fMRI time series: Cherniak's adjacency rule, size law and metamodule grouping upheld. Frontiers in Neuroanatomy, 6, 36 doi:10.3389/fnana.2012.00036 IF 3.068
  • 33. Christova P, Lewis SM, Jerde TA, Lynch JK, Georgopoulos AP (2011) True Associations between Resting fMRI Time Series Based on Innovations. J Neural Eng 8 (4):046025 IF 3.739
  • 32. Christova P, Lewis S, Tagaris G, Ugurbil K, Georgopoulos AP (2008) A Voxel-by-voxel Parametric fMRI Study of Motor Mental Rotation: Hemispheric Specialization and Gender Differences in Neural Processing Efficiency. Exp Brain Res 189, 79-90 IF 3.288
  • 31. Christova P, Anderson JH, Gomez CM (2008) Impaired Eye Movements in Presymptomatic Spinocerebellar Ataxia Type 6. Arch Neurol 65, 4, 530-536 IF 5.204
  • 30. Subramony SH, Schott K, Raike R, Callahan J, Langford L, Christova P, Anderson JH, Gomez CM (2003) Novel CACNA1A Mutation Causes Febrile Episodic Ataxia with Interictal Cerebellar Deficits. Ann Neurol 54, 6, 725-731 IF 8.051
  • 29. Anderson JH, Christova P, Xie T-D, Schott KS, Ward K, Gomez CM (2002) The Spinocerebellar Ataxia in Monozygotic Twins. Arch Neurol 59, 12, 1445-1501 IF 5.204
  • 28. Anderson JH, Yavuz MC, Kazar BM, Christova P, Gomez CM (2002) Vestibulo-ocular Reflex and Velocity Storage in Spinocerebellar Ataxia 8. Arch Ital Biol (J Neuroscience) 140, 323-329 IF 1.072
  • 27. Anderson JH, Yavuz MC, Kazar BM, Christova P, Gomez CM (2001) Eye Position Feedback in a Model of the Vestibulo-ocular Reflex for Spinocerebellar Ataxia 6. In: PROCID 23rd Annual International Conference of the IEEE, 25-28 Oct, 2001, vol 1, 840-843
  • 26. Christova P, Kossev A (2001) Human motor unit recruitment and derecruitment during long lasting intermittent contractions. J Electromyogr Kinesiol 11,3, 189-196 IF 1.725
  • 25. Christova L, Wolf W, Dimitrova M, Christova P, Kossev A (2000) Modulation of single motor unit discharge pattern during the premovement period. Biomed Techn 45 (Erg 2) 233-239 IF 0.835
  • 24. Kristev I, Christova P, Christova L, Kossev A (2000) Branched surface electrodes and measurement of propagation velocity of excitation along muscle fibers. Biomed Techn 45 (Erg. 2) 223-233 IF 0.835
  • 23. Kristev I, Christova P, Chichov V, Kossev A (2000) Surface EMG changes during sustained submaximal high contraction. CR Acad bulg sci 53, 12, 61-63 IF 0.106
  • 22.  Kristev I, Christova P, Chichov V, Kossev A (2000) Surface EMG changes during sustained maximal contraction efforts. CR Acad bulg sci 53, 11, 55-58 IF 0.106
  • 21. Christova P, Kossev A (2000) Human motor unit activity during concentric and eccentric movements. Electromyogr Clin Neurophysiol 40, 331-338
  • 20. Christova P, Kossev A (1999) Human motor unit recruitment and derecruitment during long lasting intermittent contractions. In: PROCID Symposium Muscular disorders in computer users: mechanisms and models, Copenhagen, Denmark, 25-27 November, 1999, Eds Christensen H, Sjogaard G (Nat Inst Occup Health, Copenhagen, Denmark, 1999) 94-100
  • 19. Christova P, Kossev A, Kristev I, Chichov V (1999) Surface EMG recorded by branched electrodes during sustained muscle activity. J Electromyogr Kinesiol 9, 263-276 IF 1.725
  • 18. Kossev A, Christova P (1998) Discharge pattern of human motor units during dynamic concentric and eccentric contractions. Electroenceph Clin Neurophysiol 109, 245-255 IF 2.457
  • 17. Christova P, Kossev A, Radicheva N (1998) Discharge rate of selected motor units in human biceps brachii at different muscle lengths. J Electromyogr Kinesiol 8, 287-294 IF 1.725
  • 16. Kossev A, Christova P (1998) Motor unit recruitment and discharge behavior in movements and isometric contractions. Muscle & Nerve 21, 3, 413-414 IF 2.457
  • 15. Christova P, Kossev A (1998) Motor unit activity during long-lasting intermittent muscle contractions in humans. Eur J Appl Physiol 77, 4, 379-387 IF 1.601
  • 14. Kossev A, Christova P (1997) Application of branched electrodes for stable, selective recording single motor unit discharges in humans. Biomed Techn 42, 397-400 IF 0.835
  • 13. Chichov V, Kossev A, Christova P, Chobanova M (1996) Conduction velocity and turn - amplitude analysis during sustained muscle contraction. In: Motor Control VIII. Proceedings of the VIIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1996, Eds Cantchev G, Gurfinnkel V, Stuart D, Wiesendangler M, Mori S (Sofia: Academ Publ House) 212-215
  • 12. Christova P, Kossev A, Chichov V (1996) Single motor unit activity during fatiguing ramp-and hold voluntary isometric contraction. In: Motor Control VIII. Proceedings of the VIIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1996, Eds Cantchev G, Gurfinnkel V, Stuart D, Wiesendangler M, Mori S (Sofia: Academ Publ House) 216-219
  • 11. Kosarov D, Sabev K, Christova L, Alexandrov A, Kostadinova S, Mileva K, Christova P, Antonova N (1996) Conduction velocity of muscle and nerve fibers in Lyme disease. In: Motor Control VII. Proceedings of the VIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1993 Ed Stuart D (Tucson, USA: Motor Control Press) 91-92
  • 10. Christova P, Kossev A (1996) Recruitment and derecruitment of motor units in m. biceps brachii during voluntary movements. In: Motor Control VII. Proceedings of the VIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1993, Ed Stuart D (Tucson, USA: Motor Control Press) 63-66
  • 9. Christova P, Kossev A, Radicheva N (1996) Discharge frequency of human motor units at different muscle lengths. In: Motor Control VII. Proceedings of the VIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1993, Ed Stuart D (Tucson, USA: Motor Control Press) 59-62
  • 8. Kossev A, Christova P (1996) Motor unit discharge patterns in m. biceps brachii during different voluntary movements In: Motor Control VII. Proceedings of the VIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1993, Ed Stuart D (Tucson, USA: Motor Control Press) 55-58
  • 7. Christova P, Mineva A, Dushanova J, Kossev A (1996) Changes in propagation velocity during long lasting muscle activity. In: Motor Control VII. Proceedings of the VIIth International Symposium on Motor Control, Borovets, Bulgaria, June 1993, Ed. Stuart D (Tucson, USA: Motor Control Press) 19-22
  • 6. Kossev A, Christova P (1993) Motor unit discharge pattern during voluntary concentric movements. CR Acad bulg sci 46, 8, 73-76 IF 0.106
  • 5. Kossev A, Christova P (1993) Motor unit discharge pattern during voluntary eccentric movements. CR Acad bulg sci 46, 7, 71-74 IF 0.106
  • 4. Kossev A, Gantchev N, Gydikov A, Gerasimenko Y, Christova P (1992) The effect of muscle fiber length change on motor units potentials propagation velocity. Electromyogr Clin Neurophysiol 32, 287-294
  • 3. Christova L, Kosarov D, Christova P (1992) Velocity of spreading excitation in antigravity muscles. Acta Physiol Pharmacol Bulgarica 18, 13-17
  • 2. Kossev A, Gerasimenko Y, Gantchev N, Christova P (1991) Influence of the interimpulse interval on the propagation velocity of the motor unit potentials. Electromyogr Clin Neurophysiol 31, 27-33
  • 1. Yanev T, Christova P, Gydikov A, Genchev T (1990) Optimal interelectrode distance with the method of source density analysis. Acta Physiol Pharmacol Bulgarica 3, 16, 55-62

 

 
Updated June 13, 2016