The extent to which basal ganglia disorders of postural controlare associated with abnormal central processing of somatosensory information for an internal representation of body position and motion (kinesthesia) is unknown. This project seeks to determine how kinesthetic information is used for postural control in healthy elderly subjects and subjects with Parkinson's disease (PD), a basal ganglia disorder. Both subjective measures (psychophysical) and objective measures (surface reactive forces, kinematic body CoM displacement, and muscle activation) will be used to quantify disorders of kinesthetic integration for postural control in subjects with PD compared to age-matched control subjects. Standing and sitting postural control will be examined because of stance and axial postural problems associated with PD. All studies will test subjects with PD in the ON and OFF states to examine the effects of levodopa replacement on kinesthetic control of posture.
The specific aims address 3 roles of kinesthetic information for the control of posture:
Aim I. Determine how PD affects perception of distal and proximal joint position sense and perception of postural verticality. Exp. 1 will test the hypothesis that the basal ganglia are important for conscious ankle and torso kinesthesia in stance posture. Exp. 2 will test the hypothesis that the basal ganglia integrate vestibular and somatosensory information to provide an internal representation of postural vertical.
Aim I 1. Determine whether PD impairs use of somatosensory graviception as a postural reference. Exps. 3 and 4 will test the hypothesis that PD is associated with impaired use of slow, graviceptive somatosensory information, which normally provides a reference or 'set'point for postural orientation to vertical.
Aim II 1. Define how PD impairs movement-related kinesthetic information for compensatory stepping. Exp 5 and 6 will test the hypothesis that impaired kinesthesia from the legs and falling body results in increased dependence on vision for accurate compensatory stepping to recover equilbrium. Effective rehabilitation of balance disorders requires a better understanding of how kinesthetic information is used for joint alignment, postural verticality, postural orientation, and control of postural equilibrium responses.
|Huisinga, Jessie M; St George, Rebecca J; Spain, Rebecca et al. (2014) Postural response latencies are related to balance control during standing and walking in patients with multiple sclerosis. Arch Phys Med Rehabil 95:1390-7|
|Anderson, Elise D; Horak, Fay B; Lasarev, Michael R et al. (2014) Performance of a motor task learned on levodopa deteriorates when subsequently practiced off. Mov Disord 29:54-60|
|Cohen, Rajal G; Klein, Krystal A; Nomura, Mariko et al. (2014) Inhibition, executive function, and freezing of gait. J Parkinsons Dis 4:111-22|
|Leach, Julia M; Mancini, Martina; Peterka, Robert J et al. (2014) Validating and calibrating the Nintendo Wii balance board to derive reliable center of pressure measures. Sensors (Basel) 14:18244-67|
|Smith, Beth A; Jacobs, Jesse V; Horak, Fay B (2014) Effects of amplitude cueing on postural responses and preparatory cortical activity of people with Parkinson disease. J Neurol Phys Ther 38:207-15|
|St George, Rebecca J; Carlson-Kuhta, Patricia; Nutt, John G et al. (2014) The effect of deep brain stimulation randomized by site on balance in Parkinson's disease. Mov Disord 29:949-53|
|Jacobs, Jesse V; Nutt, John G; Carlson-Kuhta, Patricia et al. (2014) Dual tasking during postural stepping responses increases falls but not freezing in people with Parkinson's disease. Parkinsonism Relat Disord 20:779-81|
|Baston, Chiara; Mancini, Martina; Schoneburg, Bernadette et al. (2014) Postural strategies assessed with inertial sensors in healthy and parkinsonian subjects. Gait Posture 40:70-5|
|Fling, Brett W; Cohen, Rajal G; Mancini, Martina et al. (2014) Functional reorganization of the locomotor network in Parkinson patients with freezing of gait. PLoS One 9:e100291|
|Fling, Brett W; Cohen, Rajal G; Mancini, Martina et al. (2013) Asymmetric pedunculopontine network connectivity in parkinsonian patients with freezing of gait. Brain 136:2405-18|
Showing the most recent 10 out of 89 publications