• Journal of Sasang Constitutional Medicine
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• v.10 no.1
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• pp.285-293
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• 1998

Yuldahansotang(YH) has been used in Sasang(四象) constitution medicine for many years as a therapeutic agent for cerebral disease. The effect of YH on the vascular system is not known. The purpose of this study was to determine the effect of YH on blood pressure, regional cerebral blood flow(rCBF) and pial arterial diameter of rats. 1. Blood pressure decreased by YH in rats. 2. rCBF was increased by YH in a dose-dependent manner. 3. Pretreatment with propranolol, methylene blue and indomethacin significantly inhibited YH induced increase in rCBF. 5. Blood pressure increased by Radix Puerariae(RP) and Radix Ligustici Tenuissimae(RLT) but Radix Scutellariae(RC) decreased blood pressure in rats. 6. rCBF was increased by RP and RLT in a dose-dependent manner but RC decreased low dosage, and RC increased high dosage. 7. Pial arterial diameter was increased by YH in a dose-dependent manner. 8. Pretreatment with propranolol significantly inhibited the increased in pial arterial diameter induced by YH. These results suggest that YH causes a diverse response of blood pressure, regional cerebral blood flow(rCBF) and pial arterial diameter. The increase in rCBF is also mediated by prostaglandins, cyclic GMP and adrenergic ${\beta}$ receptor and the increase in pial arteral diameter is mediated by adrenergic ${\beta}$ receptor.

• Korean Journal of Biological Psychiatry
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• v.9 no.2
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• pp.152-158
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• 2002

Background & Purpose:Neuropsychological disorders after traumatic brain injury(TBI) are poorly correlated with structural lesions detected by structural neuroimaging techniques such as computed tomography(CT) scan or magnetic resonance imaging(MRI). It is well known that patients with TBI have cognitive and behavioral disorders even in the absence of structural lesions of the brain. This study investigated whether there are abnormalities of regional cerebral blood flow(rCBF) in TBI patients without structural abnormality on MRI, using technetium 99m ethyl cysteinate dimer(Tc-99m-ECD) single photon emission computed tomography(SPECT) scans. Materials and Methods:Twenty-eight TBI patients without structural abnormality on MRI(mild, n=13/moderate, n=9/severe, n=6) and fifteen normal controls were scanned by SPECT. A voxel-based analysis using statistical parametric mapping(SPM) was performed to compare the patients with the normal controls. Results:rCBF was reduced in the right uncus and the right lateral orbitofrontal gyrus in the TBI patients. However, no increase of rCBF was noted in the patients in comparison to the normal controls. Conclusions:These results suggest that the TBI patients, even in the absence of structural lesion of the brain, may have dysfunction of the brain, particularly of the orbitofrontal and anterior pole of the temporal cortex. They also suggest that SPECT can be a useful method to identify brain dysfunctions in combination with structural brain imaging and neuropsychological tests.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.1
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• pp.25-30
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• 2006

This Study was designed to investigate the effects of Patholobi Caulis on the change of regional cerebral blood flow (rCBF) and blood Pressure (MABP) in normal and Cerebral ischemic rats. And, this Study was designed to investigate the inhibition of lactate dehydrogenase (LDH) activity in neuronal cells. The results were as follows : In normal rats, Patholobi Caulis significantly increased rCBF in a dose-dependent manner, and MABP was somewhat increased. In ischemia rats, rCBF was significantly and stably increased by Patholobi Caulis (10 mg/kg, i.p.) during the period of cerebral reperfusion, which contrasted with the findings of rapid and marked increase in control group. Patholobi Caulis significantly inhibited LDH activity in neuronal cells. It was suggested that Patholobi Caulis had an anti-ischemic effect through the improvement of cerebral hemodynamics and inhibitive effect on the brain damage.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.1
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• pp.49-56
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• 2005

The purpose of this study was to measure the changes of regional cerebral blood flow(rCBF) and blood pressure(BP) in rats, following the intravenous injection of Nelumbo nucifera water extract. The measurement was continually monitored by laser-doppler flowmeter and pressure transducer in anesthetized adult Sprague-Dawley rats for about 2 to 2 and half hours through the data acquisition system composed of MacLab and Macintosh computer. The results of this experiment were as follows. Nelumbo nucifera significantly increased the changes of rCBF in rats. The rCBF of Nelumbo nucifera was not changed by pretreated propranolol, atropine, L-NNA and indomethacin. But the rCBF of Nelumbo nucifera was decreased by pretreated methylene blue. Nelumbo nucifera decreased the BP significantly. The BP of Nelumbo nucifera was not changed by pretreated propranolol, atropine, L-NNA and indomethacin. But the BP of Nelumbo nucifera was decreased by pretreated methylene blue. These results indicated that Nelumbo nucifera might increase the rCBF and decrease the BP which related to guanylyl cyclase activity.

• Journal of Acupuncture Research
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• v.29 no.2
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• pp.73-88
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• 2012

Objectives : The purpose of this study is to research the effects of acupuncturing $BL_{67}$ and $LI_1$ and determine the mechanism of action of acupuncturing $BL_{67}$ and $LI_1$ by measuring the changes of regional cerebral blood flow(rCBF) and mean arterial blood pressure(MABP) in normal rats and ischemic rats. Method : This study researched the effects of acupuncturing $BL_{67}$ and $LI_1$ on the change of rCBF and MABP. To determine the mechanism of action of acupuncturing $BL_{67}$ and $LI_1$, pretreatment with indomethacine and methylene blue was done. Result : 1. Acupuncturing $BL_{67}$ and $LI_1$ significantly increased rCBF and acupuncturing $BL_{67}$ and $LI_1$ induced increase of rCBF was significantly inhibited by pretreatment with indomethacin(1 mg/kg, i.p.), an inhibitor of cyclooxygenase, and methylene blue(10 ${\mu}g$/kg, i.p.), an inhibitor of guanylate cyclase. 2. Acupuncturing $BL_{67}$ and $LI_1$ decreased MABP and there was no significantly change of decrease of MABP on acupuncturing $BL_{67}$ and $LI_1$ by pretreatment with indomethacin and methylene blue. 3. These result suggested that acupuncturing $BL_{67}$ and $LI_1$ might significantly increase rCBF by dilating arterial diameter and mechanism of acupuncturing $BL_{67}$ and $LI_1$ might be mediated by cyclooxygenase and guanylate cyclase. 4. The rCBF was significantly and stably increased by acupuncturing $BL_{67}$ and $LI_1$ during the period of cerebral reperfusion in cerebral ischemic rats, which contrasted with the rapid and marked increase in the control group. Pretreatment with methylene blue significantly decreased rCBF by acupuncturing $BL_{67}$ and $LI_1$ during the period of ischemic state, increased rCBF during the period of cerebral reperfusion. These results suggested that the mechanism of acupuncturing $BL_{67}$ and $LI_1$ might be mediated by guanylate cyclase. Conclusion : Acupuncturing $BL_{67}$ and $LI_1$ can increase rCBF in normal state, and improve stability of rCBF in ischemic state. In addition, we suggested that mechanisms related with acupuncturing $BL_{67}$ and $LI_1$ was more involved in the guanylate cyclase pathway.

• The Journal of Internal Korean Medicine
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• v.21 no.3
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• pp.417-424
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• 2000

Objective : The purpose of this study was to investigate the effects of Sasim-tang water extract on the cardiovascular systems including changes of blood pressure and regional cerebral blood flow volume (rCBF) in male Sprague-Dawely rats. Methods : The changes of blood pressure were recorded by data acquisition system composed of MacLab and Macintosh computer. The changes of rCBF were observed by Laser-Doppler flowmetry through a opened cranial window. Results : 1. The changes of blood pressure was not affected by Sasim-tang extract intravenous injection in rats. 2. After pretreatment with propranolol(3mg/kg), L-NNA(10mg/kg) and 000(10mg/kg), the changes of blood pressure was not affected by Sasim tang extract intravenous injection in rats. 3. The changes of rCBF was increased in dose-dependent manner by Sasim-tang extract intravenous injection in rats. 4, After pretreatment with propranolol(3mg/kg), ODQ(10mg/kg) and L-NNA(10mg/kg), rCBF was significantly decreased in dose- dependent manner by Sasim-tang extract intravenous injection in rats. Conclusions : These results suggest that Sasim-tang was related to the regulation of the sympathetic nerve system, nitric oxide synthesis and synthesis of cyclic GMP.

• Journal of Acupuncture Research
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• v.27 no.3
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• pp.47-57
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• 2010

Experimental Study of Taegye($KI_3$) Taebaek($SP_3$) Draining Acupuncture on the Improvement of Cerebral Blood flow and Arterial Blood Pressure. Objectives : This study was designed to investigate the effects of acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining and determine the mechanism of action of PCBL by measuring the changes of regional cerebral blood flow (rCBF) and mean arterial blood pressure (MABP) in normal rats. Methods : This study was designed to investigate whether acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining affect Regional cerebral blood flow(rCBF), Mean arterial blood pressure(MABP) in normal rats. To make manifest whether acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining was mediated by inhibitor of cyclooxygenase or guanylate cyclase which diate arterial diameter. Results 1. Acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining significantly increased rCBF but decreased MABP. This result suggests that Acupuncturing on Taegye($KI_3$) Taebaek($SP_3$) draining might significantly increase rCBF by dilating arterial diameter. 2. Acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining induced increase of rCBF was significantly inhibited by pretreatment with indomethacin (1 mg/kg, i.p.), an inhibitor of cyclooxygenase. 3. This result suggests that the action of Acupuncture on Taegye($KI_3$) Taebaek($SP_3$) draining might be mediated by cyclooxygenase.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.3
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• pp.283-291
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• 2005

This study was penonned to provide basic data that predict the usefulness of Gastrodiae rhizoma as food materials for oriental medicinal cuisine(YakSun). We measured the changes of regional cerebral blood flow(rCBF) and blood pressure(BP) in rats, following the intravenous injection of Gastrodiae rhizoma water extract The measurement was continually monitored by laser-doppler flowmeter and pressure transducer in anesthetized adult Sprague-Dawley rats for about two to two and half hours through the data acquisition system composed of MacLab and Macintosh computer. The results of this experiment were as follows. Gastrodiae rhizoma increased the changes of rCBF in rats significantly. The rCBF of Gastrodiae rhizoma did not change by pretreated propranolol, atropin, methylene blue and indomethacin. But the rCBF of Gastrodiae rhizoma was increased by pretreated L-NNA. Gastrodiae rhizaoma decreased the changes of BP significantly. The BP of Gastrodiae rhizoma did not change by pretreated propranolol, atropin, methylene blue and indomethacin. But the BP of Gastrodiae rhizoma was decreased by pretreated L-NNA. These results indicated that Gastrodiae rhizoma might increase the rCBF and the BP which related to nitric oxide synthesis. Also these results indicate that Gastrodiae rhizoma can be used as a safe and clinically applicable to diet therapy of cerebral cardiovascular disease.

• Journal of Physiology & Pathology in Korean Medicine
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• v.26 no.1
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• pp.19-25
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• 2012

This study was designed to investigate the effects of a new herbal medicine named CWS-A on the changes in regional cerebral blood flow (rCBF) and mean arterial blood pressure (MABP) in normal rats, and further to determine the mechanism of action. Also, this study was designed to investigate the effects of CWS-A on the changes in rCBF in cerebral ischemic rats and the safety examination of CWS-A in rats regared to body weight change, renal and liver function test, CBC, $LD_{50}$ and histological observation in rats. The rCBF was significantly and stably increased and MABP was significantly decreased by CWS-A during the period of cerebral reperfusion in normal rats. However, there were no here were no significant changes of rCBF in ischemic rats. In additional, there were no significant changes on the safety examination. In conclusion, these results suggest that medication of CWS-A is effective for the improve the cerebral blood flow and CWS-A can be prescribed as vertigo(眩暈) symptoms treatment.

• The Korean Journal of Nuclear Medicine
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• v.28 no.3
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• pp.307-312
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• 1994

Interictal single photon emission computed tomography of regional cerebral blood flow (rCBF SPECT) in 18 intractable temporal lobe epilepsy patients(8 male and 10 female patients: average 23.5 years old) were compared with 2.0 T magnetic resonance imaging (MRI). And surgical outcome was analysed with the findings, symptom duration and lateralization of temporal lobe. Preoperatively rCBF SPECT was done in all 18 patients with intravenous injection of 740 MBq 99mTc-HMPAO. MRI was also done preoperatively in 13 patients. Surgical outcome was classified by Engel's outcome classification(four-part classification recommended at the first Palm Desert conference). rCBF SPECT detected correctly lateralising abnormality of temporal lobe hypoperfusion in 13/18(72.2%), contralateral temporal lobe hypoperfusion in 2/18(11.1%) and showed no def-inite abnormality in 3/18(16.7%). The positive predictive value of unilateral temporal lobe hypoperfusion was 87%. MRI detected correct localising abnormality in 8/13(61.5%), such as hippocampal atrophy(7/13), asymmetric temporal horn(6/13), anterior temporal lobe atrophy(1/13), increased signal intensity from hippocampus(1/13) and calcific density(1/13), and no abnormal finding was noted in 5/13(38.5%). There was no false positive findings and the positive predictive value of MRI was 100%. Only 2 cases showed same lateralization findings in rCBF SPECT and MRI. There was no significant correlation between symptom duration and no abnormal findings on SPECT or MRI. Surgical outcome showed class I in 15/18(83.3%), and class II in 2/18(11.1%). One case of no abnormal finding in both SPECT and MRI showed class III surgical outcome. No class IV surgical outcome was noted. Surgical outcome, lateralization of epileptic focus in temporal lobe and abnormal findings in rCBR SPECT or MRI were not significantly correlated.