The aim of the biomedical research is to determine the informativeness and prognostic
factors of surface electromyography by assessing the probability of recovery of balance
and gait parameters in the second stage of rehabilitation of persons with cerebral
infarction.

Informative of Surface Electromyography and Prognostic Factors in Assessing the Recovery of Balance and Gait After Stroke

Brain Ischemia

Gait and balance measurement

Informative of Surface Electromyography and Determination of Prognostic Factors in Assessing the Probability of Recovery of Balance and Gait Parameters in Patients With Ischemic Stroke on Acute Rehabilitation

Testing key muscles from the lower extremities (muscle rectus femoris, muscle biceps
femoris, muscle gastrocnemius, lateral head, muscle tibialis anterior) against the
examiner's resistance and grading the patient's strength on a 0 (No contraction) to 5
(Movement against gravity with full resistance) scale.

The average maximum force change reached in N/cm² for the three zones: toes, mid-foot and
heel.

The average maximum pressure reached in N/cm² for the three zones: toes, mid-foot and
heel (left and right legs separately).

The change of the average point in time within a gait cycle where the maximum values for
the three zones: toes, mid-foot and heel were collected in Newton.

The average contact time change of the three zone toes, mid-foot and heel as a
percentage.

The change from baseline of the progression of the center of pressure of all the steps
recorded of one side of the body (left and right side of body separately).

The shift change forwards or backwards of the Center of pressure.

The change from baseline of the left /right shift of the center of pressure, taking all
the steps into consideration. A negative value indicates a shift to the left, and a
positive value, a shift to the right.

Time change during the phase within a gait cycle between the heel contact of one side of
the body and the heel contact of the contralateral side.

Average gait speed change from baseline during the analyzed measuring interval (30
seconds).

The phase of a gait cycle change in which the foot has contact with the ground.

Change from baseline of the phase of a gait cycle during which the foot has no contact
with the ground.

The phase change from baseline during a gait cycle that begins at contralateral initial
contact (when the heel of the contralateral side touches the ground) and ends at toe off
of the viewed side of the body.

The change from baseline of the angle between the longitudinal axis of the foot and the
walking direction.

Change of the distance between the heel contact of one side of the body and the heel
contact of the contralateral side.

the distance change between two heel contacts on the same side of the body.

The distance change between the right and left foot.

Surface electromyography measurements of key muscles (muscle rectus femoris, muscle
biceps femoris, muscle gastrocnemius, lateral head, muscle tibialis anterior) with a
disposable dual surface electrode. Change of surface electromyography signals during
walking on treadmill for 30 seconds.

Change from baseline of the averaged load distribution of the left and right forefoot or
heel, as well as the load distribution of the left and right contact surface in per cent.

Ieva Žemaitienė, PT

The BBS will be used to assess postural performance of participants. The movable platform
of the BBS allows up to 20° of surface tilt in anterior-posterior and medial-lateral
directions. The device is equipped with computer software (Biodex, version 3.1; Biodex
Medical Systems). Platform Setting 8. Test Trial Time 20 secs. A high number is
indicative of a lot of motion, which is indicative of the patient having trouble
balancing. Change from baseline postural stability by overall stability index.

During test, patients must shift their weight to move the cursor from the center target
to a blinking target and back as quickly and with as little deviation as possible.
Platform Setting STATIC. Direction control - OVERALL. Faster - better. Time change of
limit of stability test.

During test, patients must shift their weight to move the cursor from the center target
to a blinking target and back as quickly and with as little deviation as possible.
Platform Setting STATIC. Direction control - OVERALL. The goal - 65 scores and more.
Score change of limit of stability test.

Test results are compared to age dependent normative data. Scores higher than normative
values suggest further assessment. Platform Setting 12-8. Test Trial Time 20 seconds.
Direction control - OVERALL. Patient's aged 54-71 years' normative scores are 0.9-3.7
scores, 72-89 years' normative scores are 2-4 scores, 36-53 years' normative scores are
0.7-3.1 scores, 17-35 years' normative scores are 0.7-2.1 scores. Change from baseline a
fall risk by scores.

The test assesses how well a patient can integrate sensory information to maintain
balance. Change from baseline the CTSIB test by the patient's sway index, which
represents the mean absolute deviation of the patient's average position during a test.
The higher the sway index, the more unsteady the person was during the test. Test Trial
Time 30 seconds. The test performs with the patient standing on a firm and foam platform
with the eyes open and closed. Measure Sway index of Composite Score.

A test consists of three positions (Double Leg Stance, Single Leg Stance and Tandem Leg
Stance) on two types of platforms (firm and foam) for a total of six conditions. With the
Balance System SD, time and error counting is replaced with a measure of sway. Change
from baseline balancing errors by Sway index of Composite Score. The higher the sway
index, the more unsteady the person was during the test. Test Trial Time 20 seconds

Gait analysis with surface electromyography measurement: surface electromyography signals
(of affected and non-affected legs), gait and stance parameters are collected while the
patient walks for 30 seconds on the treadmill with integrated sensor equipment (for
measuring the force distribution).

Balance analysis with Biodex balance system SD: measurements of postural stability, fall
risk, limits of stability, sensory integration are collected.

Informative of Surface Electromyography and Prognostic Factors in Assessing the Recovery of Balance and Gait After Stroke

About this trial

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Placebo

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