Katsuo Fujiwara

Summary

Affiliation: Kanazawa University
Country: Japan

Publications

  1. ncbi request reprint Saccadic reaction times during isometric voluntary contraction of the shoulder girdle elevators and vibration stimulation to the trapezius
    K Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Japan
    Eur J Appl Physiol 85:527-32. 2001
  2. doi request reprint Increase in corticospinal excitability of limb and trunk muscles according to maintenance of neck flexion
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neurosci Lett 461:235-9. 2009
  3. doi request reprint Saccades and prefrontal hemodynamics in basketball players
    K Fujiwara
    Department of Human Movement and Health, Kanazawa University, Japan
    Int J Sports Med 30:647-51. 2009
  4. doi request reprint Changes in muscle thickness of gastrocnemius and soleus associated with age and sex
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa 920 8640, Japan
    Aging Clin Exp Res 22:24-30. 2010
  5. ncbi request reprint Regular heel-raise training focused on the soleus for the elderly: evaluation of muscle thickness by ultrasound
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa 920 8640, Japan
    J Physiol Anthropol 29:23-8. 2010
  6. ncbi request reprint Sports exercise effect on shortening of saccadic reaction time associated with neck extensor muscle activity
    K Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    Int J Sports Med 27:792-7. 2006
  7. ncbi request reprint Eye movement performance and prefrontal hemodynamics during saccadic eye movements in the elderly
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Physiol Anthropol 29:71-8. 2010
  8. ncbi request reprint Relationship between quiet standing position and perceptibility of standing position in the anteroposterior direction
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Physiol Anthropol 29:197-203. 2010
  9. doi request reprint Contingent negative variation and activation of postural preparation before postural perturbation by backward floor translation at different initial standing positions
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neurosci Lett 490:135-9. 2011
  10. doi request reprint Activation timing of postural muscles during bilateral arm flexion in self-timing, oddball and simple-reaction tasks
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Electromyogr Kinesiol 21:595-601. 2011

Detail Information

Publications34

  1. ncbi request reprint Saccadic reaction times during isometric voluntary contraction of the shoulder girdle elevators and vibration stimulation to the trapezius
    K Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Japan
    Eur J Appl Physiol 85:527-32. 2001
    ..We have discussed reasons for the lack of an additive effect and factors limiting shortening of reaction times...
  2. doi request reprint Increase in corticospinal excitability of limb and trunk muscles according to maintenance of neck flexion
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neurosci Lett 461:235-9. 2009
    ..No significant difference in background activity of each target muscle was found between the two conditions. Corticospinal excitability of limb and trunk muscles was selectively enhanced while neck flexion was maintained...
  3. doi request reprint Saccades and prefrontal hemodynamics in basketball players
    K Fujiwara
    Department of Human Movement and Health, Kanazawa University, Japan
    Int J Sports Med 30:647-51. 2009
    ..17+/-0.15 mmol*mm, total-Hb: 0.14+/-0.14 mmol*mm) (p<0.05). These results suggest that inhibition of eye movement to a visual target changes from voluntary to automatic through the motor learning of basketball...
  4. doi request reprint Changes in muscle thickness of gastrocnemius and soleus associated with age and sex
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa 920 8640, Japan
    Aging Clin Exp Res 22:24-30. 2010
    ..We therefore investigated age-related changes in muscle thickness of these two muscles, as well as the difference in these changes between men and women...
  5. ncbi request reprint Regular heel-raise training focused on the soleus for the elderly: evaluation of muscle thickness by ultrasound
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa 920 8640, Japan
    J Physiol Anthropol 29:23-8. 2010
    ..This study demonstrated that regular heel-raise training is an effective muscle training method for the elderly, focused on the soleus...
  6. ncbi request reprint Sports exercise effect on shortening of saccadic reaction time associated with neck extensor muscle activity
    K Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    Int J Sports Med 27:792-7. 2006
    ..Sports experience pursuing a high-speed ball will be effective in the shortening of the saccadic reaction time associated with the activity of neck extensors...
  7. ncbi request reprint Eye movement performance and prefrontal hemodynamics during saccadic eye movements in the elderly
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Physiol Anthropol 29:71-8. 2010
    ..Based on these findings, we propose a method of evaluating inhibitory function and attention allocation in anti-saccade performance, which is mainly related to the prefrontal cortex, in the elderly, using NIRS...
  8. ncbi request reprint Relationship between quiet standing position and perceptibility of standing position in the anteroposterior direction
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Physiol Anthropol 29:197-203. 2010
    ..2) Perceptibility of extreme forward- and backward-leaning positions is very high and independent of individual QS position...
  9. doi request reprint Contingent negative variation and activation of postural preparation before postural perturbation by backward floor translation at different initial standing positions
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neurosci Lett 490:135-9. 2011
    ..78) and continuous EMG increase (r=0.71). These findings suggest that as balance difficulty increases, attentional allocation to sensory information and/or postural preparation starts earlier just before the perturbation...
  10. doi request reprint Activation timing of postural muscles during bilateral arm flexion in self-timing, oddball and simple-reaction tasks
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Electromyogr Kinesiol 21:595-601. 2011
    ..We investigated the effect of time constraint on activation timing of postural muscles during bilateral arm flexion in self-timing, oddball and simple-reaction tasks...
  11. doi request reprint Effects of regular heel-raise training aimed at the soleus muscle on dynamic balance associated with arm movement in elderly women
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Strength Cond Res 25:2605-15. 2011
    ..This training consists of a low-intensity exercise that requires neither special machines nor a specific environment and can be performed safely for all old-aged groups...
  12. ncbi request reprint Age-related changes and sex differences in postural control adaptability in children during periodic floor oscillation with eyes closed
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Ishikawa, Japan
    J Physiol Anthropol 30:187-94. 2011
    ....
  13. doi request reprint Changes in event-related potentials associated with postural adaptation during floor oscillation
    K Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neuroscience 213:122-32. 2012
    ....
  14. doi request reprint Effects of neck flexion on discriminative and cognitive processing in anticipatory postural control during bilateral arm movement
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Neurosci Lett 518:144-8. 2012
    ..In addition, the onset time of postural muscles became earlier without changing the activation pattern, which was associated with the hastened discriminative processing...
  15. pmc The effects of neck flexion on cerebral potentials evoked by visual, auditory and somatosensory stimuli and focal brain blood flow in related sensory cortices
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    J Physiol Anthropol 31:31. 2012
    ..We investigated the effects of a flexed neck posture on the cerebral potentials evoked by visual, auditory and somatosensory stimuli and focal brain blood flow in the related sensory cortices...
  16. pmc Adaptation changes in dynamic postural control and contingent negative variation during backward disturbance by transient floor translation in the elderly
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa, 920 8640 Japan
    J Physiol Anthropol 31:12. 2012
    ..Posterior peak position of the center of pressure in the anteroposterior direction (CoPy) after S2 was identified. Electroencephalograms from Cz were averaged for each set, and the CNV negative peak was identified...
  17. doi request reprint Anticipatory postural control associated with bilateral arm flexion and event-related potential in a Kanji Stroop-like task
    Xuezhu Shen
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Clin Neurophysiol 120:827-33. 2009
    ..We investigated anticipatory postural control during arm flexion and event-related potential (ERP) in a Kanji Stroop-like task...
  18. ncbi request reprint Effects of neck flexion on contingent negative variation and anticipatory postural control during arm movement while standing
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    J Electromyogr Kinesiol 19:113-21. 2009
    ..In the 2.0s, but not in the 3.5s period, neck flexion resulted in an increased CNV amplitude and an increased duration of preceding activation of the postural muscles, and the correlation between these increases was significant...
  19. doi request reprint Effects of allocation of visuo-spatial attention to visual stimuli triggering unilateral arm abduction on anticipatory postural control
    Hidehito Tomita
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Clin Neurophysiol 119:2086-97. 2008
    ..We investigated the effects of allocation of visuo-spatial attention to visual stimuli triggering arm movement on anticipatory postural control...
  20. ncbi request reprint Optimal vibration stimulation to the neck extensor muscles using hydraulic vibrators to shorten saccadic reaction time
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    J Physiol Anthropol 25:345-51. 2006
    ..5 mm amplitude in the sub-maximum stretch condition was effective for shortening saccadic reaction time. The main mechanism appears to be Ia information originating from the muscle spindle...
  21. doi request reprint Effects of stance width on postural movement pattern and anticipatory postural control associated with unilateral arm abduction
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    J Electromyogr Kinesiol 19:e187-96. 2009
    ..However, preceding activation became prominent (about 20 ms) in ITFg for wide stances. Moreover, bilateral activation of the tensor fascia latae was observed in CTFg for all widths...
  22. ncbi request reprint Effect of vibration stimulation to neck extensor muscles on reaction time in various saccadic eye movements
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Takara machi, Kanazawa, Japan
    Int J Neurosci 119:1925-40. 2009
    ....
  23. ncbi request reprint Perception of large change in distribution of heel pressure during backward leaning
    Katsuo Fujiwara
    Department of Human Movement and Health Graduate School of Medical Science, Kanazawa University, Japan
    Percept Mot Skills 100:432-42. 2005
    ..86; r = .71, respectively). The results indicate that subjects accurately perceive large changes in distribution of heel pressure and that the morphological features of the foot contribute to these changes...
  24. ncbi request reprint Perceptibility of large and sequential changes in somatosensory information during leaning forward and backward when standing
    Hitoshi Asai
    Department of Physical Therapy, School of Health Sciences, Faculty of Medicine, Kanazawa University, Japan
    Percept Mot Skills 96:549-77. 2003
    ..Given these findings, we discussed the role and interrelatedness of pressure sensation in perceiving large and sequential changes in somatosensory information while standing and leaning forward and backward...
  25. doi request reprint Postural sway and brain potentials evoked by visual depth stimuli
    Takeo Kiyota
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
    Int J Neurosci 118:935-53. 2008
    ..Brain evoked potentials correlated with CFP displacement as well as the latency of onset of EMG response. Onset of EMG response was probably related to the P120 component, whereas CFP displacement was related to the P250 component...
  26. ncbi request reprint Postural muscle activity patterns during standing at rest and on an oscillating floor
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    J Electromyogr Kinesiol 16:448-57. 2006
    ..Periodicity of soleus and gastrocnemius increased at higher frequencies and was higher in gastrocnemius than in soleus. The periodicity difference between both muscles decreased with increasing oscillation frequency...
  27. ncbi request reprint Effects of preparatory period on anticipatory postural control and contingent negative variation associated with rapid arm movement in standing posture
    Kaoru Maeda
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Japan
    Gait Posture 25:78-85. 2007
    ..Weak correlations were observed between late CNV and onset time of gastrocnemius activity. It is suggested that earlier activation of gastrocnemius is a strategy adopted when response stimulus timing is relatively difficult to predict...
  28. ncbi request reprint Postural movement pattern and muscle action sequence associated with self-paced bilateral arm flexion during standing
    Katsuo Fujiwara
    Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Percept Mot Skills 104:327-34. 2007
    ..The action of biceps femoris and erector spinae significantly preceded that of anterior deltoid in the backward leaning and hip extension types but did not in the hip flexion type...
  29. ncbi request reprint Anticipatory activation of postural muscles associated with bilateral arm flexion in subjects with different quiet standing positions
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    Gait Posture 17:254-63. 2003
    ..Significant correlation was observed between the background activity and activation time in both the BF and ES...
  30. ncbi request reprint Influences of illusionary position perception on anticipatory postural control associated with arm flexion
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa 920 8640, Japan
    J Electromyogr Kinesiol 13:509-17. 2003
    ..In both the biceps femoris and erector spinae, the mean amplitude of electromyogram for the first 50 ms after the start of activation did not differ significantly among the three conditions...
  31. ncbi request reprint Perceived standing position after reduction of foot-pressure sensation by cooling the sole
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Japan
    Percept Mot Skills 96:381-99. 2003
    ..These results may be explained as due to an absence of marked changes in sensory information from both muscular activity and foot pressure when moving to reference positions close to the quiet standing posture...
  32. doi request reprint Effects of anti-saccade training with neck flexion on eye movement performance, presaccadic potentials and prefrontal hemodynamics in the elderly
    Naoe Kiyota
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, 13 1 Takara machi, Kanazawa, 920 8640, Japan
    Eur J Appl Physiol 110:1143-54. 2010
    ..Moreover, training with neck flexion showed small but synergistic effects on performance and frontal activity. However, these trainings would be insufficient for elderly individuals to automatically control anti-saccade...
  33. ncbi request reprint Latency of saccadic eye movement during contraction of bilateral and unilateral shoulder girdle elevators
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Japan
    Percept Mot Skills 96:173-84. 2003
    ..Thus, the relative force for producing a marked shortening of saccadic latency is observed within a wider range during unilateral contraction than bilateral contraction...
  34. ncbi request reprint Postural control adaptability to floor oscillation in the elderly
    Katsuo Fujiwara
    Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University Department of Human Movement and Health, Graduate School of Medical Science, Kanazawa University, Kanazawa 920 8640, Japan
    J Physiol Anthropol 26:485-93. 2007
    ..In conclusion, age, but not gender, appears to affect adaptation of postural sway with short-term practice, although some elderly subjects maintain postural sway velocity and adaptability capabilities similar to those of young subjects...