About the authors |
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xi | |
Acknowledgments |
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xv | |
Introduction |
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xvii | |
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1 How is balance controlled by the nervous system? |
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A What is balance control? |
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1 | (2) |
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B What are the critical properties of balance control? |
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3 | (3) |
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C What are the main balance domains to assess? |
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6 | (7) |
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D What parts of the brain are involved in balance control? |
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13 | (3) |
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E What is the role of the basal ganglia in balance control? |
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16 | (4) |
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F Balance is a complex sensorimotor task that can be improved with practice |
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20 | (1) |
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21 | (1) |
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21 | (4) |
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2 Why is balance so important in Parkinson disease? |
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A How common are balance disorders in PD? |
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25 | (1) |
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B How important are balance and gait to the wellbeing of a person with PD? |
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25 | (1) |
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C When do balance problems emerge? |
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26 | (1) |
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D Why does Parkinson disease affect balance? |
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26 | (2) |
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E How does dopaminergic replacement therapy work? |
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28 | (2) |
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F Do dopaminergic mechanisms explain all the balance deficits of parkinsonism? |
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30 | (1) |
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G How is balance affected in Parkinson-Plus syndromes? |
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31 | (2) |
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H Do nonmotor signs affect balance control in PD? |
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33 | (1) |
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34 | (1) |
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34 | (3) |
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3 How is balance during quiet stance affected by PD? |
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37 | (1) |
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A How does PD affect postural alignment? |
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37 | (4) |
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B How are limits of stability impaired in PD? |
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41 | (2) |
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C What is the contribution of axial tone to standing balance? |
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43 | (2) |
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D Why is postural sway important? |
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45 | (1) |
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E Does PD affect sensory integration for balance? |
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46 | (2) |
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F Does levodopa improve standing balance? |
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48 | (2) |
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G Do other medications influence balance? |
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50 | (1) |
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H What are the effects of deep brain stimulation on standing posture? |
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51 | (2) |
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I Can rehabilitation improve standing posture? |
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53 | (1) |
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54 | (1) |
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55 | (8) |
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4 How are postural responses to external perturbations affected by PD? |
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63 | (1) |
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A How are retropulsion and propulsion related to impaired postural responses? |
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63 | (2) |
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B Why do patients with PD show more abnormalities in their postural responses in the backward direction than other directions (or do they?) |
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65 | (3) |
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C What are the major postural responses deficits in PD? |
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68 | (3) |
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D How does PD affect adaptation of postural responses to changes in environmental context? |
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71 | (2) |
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E Does levodopa improve postural responses? |
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73 | (3) |
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F Does deep brain stimulation improve postural responses? |
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76 | (2) |
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G Does rehabilitation improve postural responses? |
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78 | (2) |
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80 | (1) |
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80 | (3) |
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5 How are anticipatory postural adjustments in preparation for voluntary movements affected by PD? |
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83 | (1) |
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A Are APAs hypometric in PD? |
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83 | (4) |
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B Are APAs context-dependent? |
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87 | (1) |
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C Does levodopa improve APAs? |
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88 | (2) |
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D What are the effects of deep brain stimulation on APAs? |
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90 | (2) |
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E Can rehabilitation affect APAs? |
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92 | (2) |
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94 | (1) |
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94 | (5) |
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6 How is dynamic balance during walking affected by PD? |
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99 | (1) |
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A How does impaired balance affect gait and impaired gait affect balance in PD? |
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99 | (11) |
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B How is predictive and reactive obstacle avoidance during walking affected by PD? |
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110 | (2) |
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C How does levodopa and deep brain stimulation affect dynamic balance, as well as gait? |
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112 | (2) |
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D Rehabilitation and exercise improve gait but do they also improve dynamic balance control during walking? |
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114 | (3) |
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117 | (1) |
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117 | (6) |
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7 How and why is turning affected by Parkinson disease? |
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123 | (1) |
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A Why is turning a difficult dynamic balance task? |
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123 | (1) |
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B PD affects many sensorimotor control systems important for controlling a turn |
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124 | (7) |
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C Turning impairments are sensitive to early disease, falls, and freezing of gait |
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131 | (2) |
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D Can levodopa, deep brain stimulation, or exercise improve turning? |
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133 | (1) |
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134 | (1) |
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134 | (5) |
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8 Is freezing of gait a balance disorder? |
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139 | (1) |
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A What is freezing of gait and why it is associated with falls |
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139 | (3) |
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B Do freezers have more balance disorders than nonfreezers? |
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142 | (8) |
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C Do brain circuitry abnormalities in freezers suggest causes for FoG? |
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150 | (3) |
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D How can FoG be treated with medication? |
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153 | (1) |
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E Does deep brain stimulation improve FoG? |
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153 | (1) |
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F Does rehabilitation improve FoG? |
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154 | (2) |
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156 | (1) |
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156 | (7) |
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9 How should the clinician approach imbalance in PD? |
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A When in the course of PD should clinicians address balance issues? |
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163 | (1) |
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B When is exercise helpful for balance disorders? |
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163 | (4) |
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C Does levodopa, dopamine replacement therapy, improve balance? |
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167 | (2) |
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D What considerations should a history of falls trigger? |
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169 | (4) |
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E How will deep brain stimulation affect balance? |
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173 | (1) |
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F How can freezing of gait be treated? |
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174 | (2) |
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G How should advanced PD incapable of independent ambulation be treated? |
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176 | (1) |
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177 | (1) |
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178 | (3) |
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10 Future perspectives on balance disorders in PD |
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A How can wearable technology improve assessment of balance? |
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181 | (3) |
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B How will wearable or embedded technology improve mobility in daily life? |
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184 | (2) |
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C How could new technologies improve rehabilitation of balance disorders? |
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186 | (4) |
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D Will future medications likely improve balance in PD? |
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190 | (1) |
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E Could different electrical stimulation targets improve balance in PD? |
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191 | (3) |
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194 | (7) |
Index |
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201 | |