Soleus H-Reflex Modulation After Motor Incomplete Spinal Cord Injury: Effects of Body Position and Walking Speed
| Autor: | Sangeetha Madhavan, Mark H. Trimble, Andrea L. Behrman, Carl G. Kukulka, Chetan P. Phadke, Floyd J. Thompson, Mark G. Bowden, Preeti M. Nair |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
0301 basic medicine
Adult Male medicine.medical_specialty Soleus h reflex Adolescent medicine.medical_treatment Original Contributions Posture Walking Statistics Nonparametric H-Reflex 03 medical and health sciences Young Adult 0302 clinical medicine Physical medicine and rehabilitation Medicine Humans Spasticity Treadmill Muscle Skeletal Spinal cord injury Spinal Cord Injuries Aged Rehabilitation business.industry Body position Middle Aged medicine.disease Preferred walking speed 030104 developmental biology Exercise Test Female Neurology (clinical) medicine.symptom H-reflex business 030217 neurology & neurosurgery Psychomotor Performance |
| Popis: | To examine position-dependent (semireclined to standing) and walking speed-dependent soleus H-reflex modulation after motor incomplete spinal cord injury (SCI).Twenty-six patients with motor incomplete SCI (mean: 45 +/- 15 years) and 16 noninjured people (mean: 38 +/- 14 years).Soleus H-reflexes were evoked by tibial nerve stimulation. Patients were tested in semireclined and standing positions (experiment 1) and in midstance and midswing positions (experiment 2).H-reflexes were significantly greater after SCI in all positions compared with noninjured people (P0.05). Position-dependent modulation from semireclined to standing (normally observed in noninjured people) was absent after SCI. In SCI patients, H-reflex modulation was not significantly different at 1.2 m/s compared with 0.6 m/s treadmill walking speed; in noninjured people, H-reflex modulation was significantly greater at 1.2 m/s compared with 0.6 m/s treadmill walking speed. There was a significant positive correlation between modified Ashworth scores, a clinical measure of spasticity and soleus H-reflex amplitudes tested in all positions. A significant negative correlation was also found between H-reflexes in standing and midstance positions and the amount of assistance patients required to walk.An improvement in position-dependent and walking speed-dependent reflex modulation after SCI may indicate functional recovery. Future studies will use H-reflex testing to track changes as a result of therapeutic interventions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|