• 제목/요약/키워드: Somatosensory

검색결과 219건 처리시간 0.027초

하지 체성 감각이 선형 운동 지각에 미치는 영향 (Effect of Lower Limbs Somatosensation on Linear Motion Perception)

  • 이용우;박수경
    • 대한기계학회논문집A
    • /
    • 제31권6호
    • /
    • pp.686-693
    • /
    • 2007
  • To perceive body movement, the nervous system uses multi-sensory cues such as vision, vestibular signals, and somatosensation. Among the multi-sensory modality, the previous researchers reported that the lower limb somatosensation plays an important role on maintaining postural balance. In this study, we examined the contribution of somatosensory cues to linear motion perception by measuring the detection threshold of the direction of linear motion with and without lower limb somatosensory constraints. Six healthy male volunteers participated in randomly ordered 33 single sinusoidal acceleration trials with the stimulus at 0.25Hz with peak magnitude ranged from 0 to 8mG. After each stimulus, subjects reported their perceived direction of motion by button press. Results showed that the reduced lower limb somatosensation significantly increased perception threshold. Without constraints, mean threshold was $0.82{\pm}0.23mG$, while it was $1.23{\pm}0.35mG$ with reduced lower limb somatosensation. The results suggest that without visual cues, perception of the movement direction strongly depends on the lower limb somatosensory information.

Effect of Motor Imagery Training on Somatosensory Evoked Potentials and Upper Limb Function in Stroke Patients

  • Choi, Jongbae;Yang, Jongeun
    • 국제물리치료학회지
    • /
    • 제11권1호
    • /
    • pp.2005-2011
    • /
    • 2020
  • Background: Motor imagery is the mental representation of an action without overt movement or muscle activation. However, few previous studies have demonstrated motor imagery training effects as an objective assessment tool in patients with early stroke. Objective: To investigate the effect of motor imagery training on Somatosensory Evoked Potentials (SSEP) and upper limb function of stroke patients. Design: A quasi-experimental study. Methods: Twenty-four patients with stroke were enrolled in this study. All subjects were assigned to the experimental or control group. All participants received traditional occupational therapy for 30 minutes, 5 times a week. The experimental group performed an additional task of motor imagery training (MIT) 20 minutes per day, 5 days a week, for 4 weeks. Both groups were assessed using the SSEP amplitude, Fugl-Meyer assessment of upper extremity (FMA UE) and Wolf motor function test. Results: After the intervention, the experimental group showed significant improvement in SSEP amplitude and FMA UE than did the control group. Conclusion: These findings suggest that the MIT effectively improve the SSEP and upper limb function of stroke patients.

정상성인의 시각 및 촉각 통합 작용 시 뇌신경세포의 전기생리적활동의 시간 및 공간적 특성: 예비실험 (Temporal and Spatial Characteristics of Visual and Somatosensory Integration in Normal Adult Brain)

  • 주유미;김지현
    • 대한감각통합치료학회지
    • /
    • 제8권1호
    • /
    • pp.41-49
    • /
    • 2010
  • 목적 : 다감각 통합은 인지과제나 운동실행을 위해 다양한 감각정보를 사용하는 데 있어서 필수적인 처리과정이다. 특히 시각 및 체감각의 통합은 운동 행동의 주요한 요소이다. 본 연구는 감각통합 과정의 시간적 경로와 뇌의 담당 위치를 파악하기 위해 신경생리학적 연구방법을 사용하여 시각과 체감각의 통합과정과 관련된 뇌의 시간적 및 공간적 특성을 조사하였다. 연구 방법 : 실험실 상황에서 시각과 촉각 자극을 독립적으로 또는 동시에 제시하고 유발전위검사(ERP: Event-Related Potentials)를 통해 통합작용 시 뇌에서 일어나는 신경세포들의 전기생리적활동을 측정하였다. 이때 시각 과 촉각을 각각 제시하여 얻은 유발전위신호들의 선형합과 두 개의 자극을 동시에 제공하였을 시 발생되는 유발전 위신호를 측정하여 비교하였다. 결과 : 시각과 촉각을 독립적으로 각각 제시하여 얻은 유발전위신호(SUM)의 합과 두 개의 자극을 동시에 제공하여 얻은 유발전위신호(SIM)는 같지 않았다. 특히나 자극의 반대측인 오른쪽 일차체감각영역(C4)에서 SIM은 SUM 보다 특정시간대에 통계적으로 유의미한 차이를 보였으며, Bilateral parietal areas(P3, Pz, P4) 뿐만 아니라 일차 시각영역(O1,O2)에서도 두 조건간 추가적인 통합관련 신경활동전기신호에 의한 통계적으로 유의미한 차이를 나타내고 있다. 결론 : 뇌 속에서 2개 이상의 감각이 통합될 경우 이와 관련된 추가적인 신경세포활동이 일어나고 있으며, 이는 다 감각을 동시에 제공할 경우 뇌의 활동을 더욱 활발하게 촉진시키고 있음을 시사한다.

  • PDF

수두증 흰쥐 모델에서 수두증 정도에 따른 체성 감각 유발 장전위의 변화 (Change of Somatosensory Evoked Field Potential according to the Severity of Hydrocephalus in Kaolin-induced Hydrocephalus of Rats)

  • 김동석;이광수;박용구;김세혁;최중언;이배환;류재욱
    • Journal of Korean Neurosurgical Society
    • /
    • 제29권1호
    • /
    • pp.5-14
    • /
    • 2000
  • Objective : Somatosensory evoked potential(SSEP) has been known to be a good method for evaluating brain stem function, but it is not sufficient to check the fine changes of cortical functions. A fine change of cortical function can be expressed with somatosensory evoked cortical field potential(SSEFP) rather than general SSEP. To confirm the usefulness of SSEFP for evaluating the cortical function, the authors simultaneously measured SSEFP and the intracranial pressure-volume index(PVI) in kaolin-induced hydrocephalic rats. Method : Hydrocephalus was induced with injection of 0.1ml kaolin-suspended solution into the cisterna magna in 60 Sprague-Dawley rats. The authors measured PVI and SSEFP 1 week after injection of kaolin-suspended solution. To evaluate the severity of induced hydrocephalus, we measured the transverse diameter of the lateral ventricle on the coronal slice of the rat brain 0.40mm posterior to the bregma. Result : The typical wave form of SSEFP in control rats showed a negative-positive complex wave at early latency. In SSEFP of normal rats, N0 is 10.0 msec, N1 15.3 msec, P1 31.2 msec and N1-P1 amplitude $15.4{\mu}V$. As hydrocephalus progressed, the peak latency of N1 and P1 were delayed. In mild hydrocephalus, negative peak waves were split. The N1-P1 amplitude was decreased only in severe hydrocephalus. The changes of the characteristics of SSEFP according to the severity of hydrocephalus were well correlated with the changes of PVI. Shunting normalized the characteristics of SSEFP in relation to ventricular sizes and PVI in hydrocephalic rats. Conclusion : SSEFP may be useful for evaluating the impairment of cortical function in hydrocephalus.

  • PDF

전방머리자세에 변화에 따른 턱관절 기능 및 정량적 체성감각의 상관분석 (The Function and Quantitative Somatosensory Correlation Analysis of Temporomendibular Joint according to Forward Head Posture)

  • 이은상
    • 한국산학기술학회논문지
    • /
    • 제20권12호
    • /
    • pp.645-651
    • /
    • 2019
  • 본 연구는 전방머리자세와 턱관절 장애 및 정량적 턱관절의 체성감각의 상관관계를 알아보고자 연구를 진행하였다. 본 연구는 대상자 선정요구를 충족한 62명의 대상자(22.15±2.56세)을 대상으로 전방머리자세에 대한 중재 후 전방머리 자세 변화에 따른 턱관절 기능 및 체성감각의 상관관계를 분석하였다. 전방머리자세에 대한 중재는 바이오피드백 훈련을 실시하였으며, 주 3회 총 4주간 총 12회 진행되었다. 전방머리자세를 평가하기 위하여 머리-척추각을 검사하였으며, 턱관절 기능은 입 벌림과 좌, 우측 치우침을 검사 하였고, 체성감각의 변화를 확인하기 위하여 진동역치감각을 측정하였다. 연구결과 머리 척추각의 변화에 따른 턱관절 기능(p<0.001) 및 체성감각(p<0.001)의 변화는 모두 유의한 상관관계를 보였다. 연구 결과 전방머리자세와 턱관절 기능 및 체성감각에 유의한 상관관계를 보였으며, 본 연구를 기반으로 턱관절 장애로 고통 받고 있는 환자들에게 턱관절 치료에 새로운 패러다임을 제공 할 수 있을 것이며, 향후 턱관절의 치료에 대한 기초 자료로 제공 될 수 있을 것이다.

두침과 상하지 침자극이 뇌와 뇌의 체성감각피질에 미치는 영향에 대한 fMRI Study (Effects of Head Acupuncture Versus Upper and Lower Limbs Acupuncture on Signal Activation of Blood Oxygen Level Dependent(BOLD) fMRI on the Brain and Somatosensory Cortex)

  • 박정미;곽자영;조승연;박성욱;정우상;문상관;고창남;조기호;김영석;배형섭;장건호;방재승
    • Journal of Acupuncture Research
    • /
    • 제25권5호
    • /
    • pp.151-165
    • /
    • 2008
  • Objectives : To evaluate the effects of Head Acupuncture versus Upper and Lower Limbs Acupuncture on signal activation of Blood Oxygen Level Dependent(BOLD) fMRI on the Brain and Somatosensory Cortex. Subjects and Methods : 10 healthy normal right-handed female volunteer were recruited. The average age of the 10 subjects was 30 years old. The BOLD functional MRI(fMRI) signal characteristics were determined during tactile stimulation was conducted by rubbing 4 acu-points in the right upper and lower limbs($LI_1$, $LI_{10}$, $LV_3$, $ST_{36}$). After stimulation of Head Acupuncture in Sishencong($HN_1$), $GB_{18}$, $GB_9$, $TH_{20}$ of Left versus Upper and Lower Limbs Acupuncture($LI_1$, $LI_{10}$, $LV_3$, $ST_{36}$ of Right) and took off needles. Then the BOLD fMRI signal characteristics were determined at the same manner. Results : 1. When touched with cotton buds(sensory stimulation), left Parietal Lobe, Post-central Gyrus, primary somatosensory cortex(BA 1, 2, 3), and primary motor cortex(BA 4) were mainly activated. When $ST_{36}$ was stimulated, Frontal Lobe, Parietal Lobe, Cerebellum, and Posterior Lobe as well as Inter-Hemispheric displaying a variety of regions. 2. In signal activation before and after Head Acupuncture reaction, it showed signal activation after removing the acupuncture needle and right Somatosensory Association Cortex, Postcentral Gyrus, and Parietal Lobe were more activated. 3. In reactions of before and after Upper and Lower Limb Acupuncture, it also showed signal activation after removing the acupuncture needle and bilateral Occipital Lobe, Lingual Gyrus, visual association cortex, and Cerebellum were activated. 4. After acupuncture stimulation, In Upper and Lower Limb Acupuncture Group, left frontal Lobe, Precentral Gyrus and Bilateral parietal lobe, Postcentral Gyrus and Primary Somatosensory Cortex(BA 2) were activated. In Head Acupuncture Group, which has most similar activation regions, but especially right Pre-Post central Gyrus, Primary Somatosensory Cortex(BA 3), Primary Motor Cortex, frontal Lobe and Parietal Lobe were activated. Conclusions : When sensory stimulation was done with cotton buds on four acup-points($LI_1$, $LI_{10}4, $LV_3$, $ST_{36}$), while bilaterally activated, contralateral sense was more dominant. It showed consistency with cerebral cortex function. When $ST_{36}$ was stimulated Frontal Lobe, Parietal Lobe, Cerebellum, Posterior Lobe as well as Inter-Hemispheric were stimulated. In Head Acupuncture, it showed more contralateral activation after acupuncture. In Upper and Lower Limb Acupuncture, it showed typically contralateral activation and deactivation of limbic system after acupuncture stimulation. Therefore, there were different fMRI BOLD signal activation reaction before and after Head Acupuncture vs Upper and Lower Limb Acupuncture which might be thought to be caused by acu-points' sensitivity and different sensory receptor to response acupuncture stimulation.

  • PDF

수술 중 신경계 감시 (Intraoperative Neuromonitoring)

  • 서대원
    • Annals of Clinical Neurophysiology
    • /
    • 제10권1호
    • /
    • pp.1-12
    • /
    • 2008
  • Intraoperative neuromonitoring (INM) is well known to be useful method to reduce intraoperative complications during the surgery of nervous system lesions. Evoked potentials are most commonly used among the electrophysiological tests. Brainstem auditory evoked potentials are for detecting the problems along the auditory pathways including the eighth cranial nerve and brainstem. Somatosensory evoked potentials are applied for preventing the spinal cord lesions. The INM is affected by many factors. In order to perform an optimal INM, the confounding factors including technical, anesthetical, and individual factors should be kept well under control. INM has frequent electrophysiologic changes during the surgery and it might be helpful to keep one's eyes on which monitoring modalities are reluctant to change during each operation. The skillful monitoring and timely interpretation of electrophysiologic changes can drive the patient to be undergone surgery, even in high surgical risk group.

  • PDF

The Effects of Bombesin on the Afferent Sensory Transmission in the Spinal Trigeminal Nucleus of Anesthetized Rats

  • Shin, Hyung-Cheul;Won, Chung-Kil;Kim, Jun;Park, Hyoung-Jin
    • The Korean Journal of Physiology
    • /
    • 제28권1호
    • /
    • pp.105-111
    • /
    • 1994
  • The present study was carried out to determine the effects of intracisternal administration of three doses of bombesin $(0.001,\;0.01\;and\;0.1\;{\mu}g)$ on afferent somatosensory transmission in single neurons of the spinal trigeminal nucleus of anesthetized rats. Lower doses $(0.001\;{\mu}g)$ of bombegin did not change the afferent sensory transmission. Medium doses $(0.01\;{\mu}g)$ of bombesin significantly (p p<0.01) facilitated afferent sensory transmission in the 6 to 30 min post-drug period, but higher doses $(0.1\;{\mu}g)$ inhibited responsiveness of spinal trigeminal neurons in the 16 to 35 min post-drug period. The results indicate that endogenous bombesin-like peptide present in the spinal trigeminal nucleus may participate in the processing of the somatosensory information arising from the face.

  • PDF

Implementation of Network System for Bio-physical signal Communication

  • Kim, Jeong Lae;Kang, Jeong Jin;Rothwell, Edward J.
    • International Journal of Advanced Culture Technology
    • /
    • 제1권1호
    • /
    • pp.1-5
    • /
    • 2013
  • This network system for home care realized communication by the bio-physical signal, to convey physical rhythm. Four function of displacement had point of a Vision, Somatosensory, Vestibular and CNS. Bio-physical signal was decided to design a maximum points and minimum points with 0.01unit in reference level. Bio-physical signal was checked to compound physical condition of body posture for sensory organ. There detected a measurement of Vision, Somatosensory, Vestibular, CNS and BMI. The service of network system of home can be used to support a health care system for health assistant in health care center. It will expect to manage a physical parameter for network communication.

  • PDF