Research Report Abstracts - Gesundheit

WPT2011, Research Report Abstracts eS531
Relevance: The present study provides client with
orthopaedic disorder of lower extremity for the validity of
fiber-focused exercise for improving ability of daily living
efficiently.
Participants: Five healthy male volunteers (24.5 ± 2.1
years) without medical history of lower extremity disorder
participated in this study.
Methods: EMG (km-818MT, mediarea support business
union) measured muscle activity at heel contact during changing
direction with right lower extremity pivoted after five
meters straight walking. Angles of changing direction were
set 30, 60, 90 and 120 degree. Participants performed 3
times in each direction. A digital video camera synchronized
with EMG software recorded the movement during collecting
dates. Bipolar surface electrodes were attached to the right
side of gluteus medius (Gmed) and gluteus maximus (Gmax).
Analysis: EMG signals at heel contact of right leg during
straight walking and changing direction were normalized to
integrated EMG (%IEMG) with 5% interval width. High frequency
(over 80 Hz) on the same period was collected by
WT analysis. These collected values were took statistics by
student’s t-test.
Results: High frequency during changing direction indicated
much higher than straight walking whereas %IEMG between
straight and changing direction during walking showed no
significant difference.
Conclusions: High frequency observed when musculoskeletal
contraction is said to reflect the contraction of type 2
fiber and activate especially when being required to contract
instantaneously. Results indicated the important view
of point that we should consider not only quantitative factors
as increase-decrease of muscle activity but also qualitative
changes so that we can focus and exercise with more specific
clinical reasons.
Implications: For physical therapy practice.
Keywords: Wavelet transform analysis; Hip abductors;
Changing direction
Funding acknowledgements: None.
Ethics approval: This study was approved by the Human
Subject Committee of Kinkai rehabilitation hospital where
the data were collected.
Research Report Poster Display
Number: RR-PO-201-12-Thu Thursday 23 June 13:00
RAI: Exhibit Halls2&3
EFFECTS OF RESPIRATORY FUNCTION ON RATS
WITH CERVICAL SPINAL CORD INJURY
Imagita H. 1 , Nishikawa A. 2 , Nishio S. 2 , Kanemura N. 3 ,
Moriyama H. 4 , Nishii Y. 2 , Sakata S. 2 , Shindo H. 2
1Kio University, Department of Physical Therapy, Nara,
Japan, 2Kio University, Graduate School of Health Sciences,
Nara, Japan, 3Saitama Prefectural University, Department
of Physical Therapy, Saitama, Japan, 4Hiroshima University,
Department of Physical Therapy and Occupational Therapy
Sciences, Hiroshima, Japan
Purpose: The respiratory function of patients with cervical
spinal cord injury not only affects the activity levels of daily
living but also has a significant effect on life support. The
purpose of the present study is to analyze the effects on the
respiratory function of Wistar rats with cervical spinal cord
injury.
Relevance: To determine respiratory function and diaphragmatic
electromyogram of rats with cervical spinal cord injury.
Participants: 26 male Wistar rats of 10 weeks old were used
in this study.
Methods: The seriousness of cervical spinal cord injury in
the Wistar rats were modeled in levels from C2 to C7, and
the rats’ tidal volume and the electromyography (EMG) of
the diaphragm muscle were measured. The EMG signal was
induced in bipolar process by the silver wire electrodes with a
diameter of 0.003 mm, which were placed at the costal region
of the diaphragm. The EMG signal was passed through a
20–2 kHz band-pass filter, it was amplified by a bioelectric
amplifier and was monitored on a personal computer.
Analysis: Results were compared among levels with ANOVA
test followed by Tukey’s test. P value of less than 0.05 was
regarded to be statistically significant.
Results: After the operation, the tidal volume of rats with C2
level injury decreased about 5%, and that of rats with C3 level
about 25%. In addition, the diaphragmatic electromyogram
of both rats with C2 and C3 levels has decreased remarkably.
The tidal volume of rats with C5 to C7 levels has decreased
about 75–95%. In contrast, their diaphragm muscle activity
has increased about 10–20%.
Conclusions: In the cervical spinal cord injury sustained by
the rats in this study, the group of respiratory muscles that
receive innervation from the thoracic spinal cord, i.e. the
external intercostal muscle, the internal intercostal muscle,
the innermost intercostal muscle, and the abdominal muscle,
has been paralyzed. It is concluded that the muscle activity
of the diaphragm has increased as a result of the paralysis.
Implications: These results have proved that relationship
between respiratory function and level of cervical spinal cord
injury exists. In the future, it is necessary to investigate ways
to provide respiratory physiotherapy to patients with cervical
spinal cord injury.