후두하 신장운동이 두경부자세와 흉쇄유돌근 및 승모근 활성에 미치는 영향
Effects of Suboccipital Stretch on the Head and Neck Posture and the Electromyographic Activity of the Sternocleidomastoideus and the Upper Trapezius
소속 상세정보
1/2김창현/12Chang Hyun Kim
1/2한경수/1/2현태연/12Kyung Soo Han/12Tae Yeon Hyun
KMID : 0355220000250010099
Abstract
This study was performed to investigate the effect of suboccipital stretch on the head
and neck posture the electromyographic(EMG) activity of some cervical muscles. For
this study, 39 patients with temporomandibular disorders(TMD) and 34 dental students
without any signs and symptoms in the masticatory system were selected as the
patients group and as the normal group, respectively. Head position by goniometer
CROM (Performance attainment, St. Paul, USA), EMG activity by
BioEMG (Bioresearch Inc., Nilwaukee, USA), and craniocervical posture
by cephaloradiography were observed in both natural head postrue (NHP) and head
posture with suboccipital stretch(tuck posture) abtained from slight posteroinferior finger
pressure on the chin. Variables measured on the cephaloradiograph were SN angle, atlas
angle CVT angle, occiput-atlas and atlas-axis distance, and pharyngeal width.
The data obtained were analysed by SPSS windows program and the results of this
study were as follows :
1. In the sagittal plane, degree of anterior rotation of the head by suboccipital stretch
was 6.3 in the patients group, and 6.2 in the normal group, respectively. So there was
no significant difference between the two groups for degree of anterior rotation, but the
position of the head in the patients group were more posteriorly extended than in the
normal group in both NHP and tuck posture.
2. EMG activity of the sternocleidomastoideus in the patients group, and that of the
upper trapezius and the sternocleidomastoideus in the normal group were increased by
suboccipital stretch. The range of ENG activity, however, in these cervical muscles were
1.6 - 2.3 μV.
3. Cephalometric variables such as SN angle, atlas angle, CVT angle, occiput-atlas and
atlas-axis distance except pharyngeal width were generally increased by suboccipital
stretch. There was some difference, however, in results between the two groups. Atlas
angle was not changed in the patients group whereas CVT angle was not changed in
the normal group.
4. The distance from subocciput to spinous process of axis was significantly increased
as much as 3.0㎜ in the patients group, and 3.7㎜ in the normal group by suboccipital
stretch.
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