scholarly journals A Serpiginous Pericallosal Anterior Cerebral Artery

2018 ◽  
Vol 7 (6) ◽  
pp. 323-326
Author(s):  
Mohamad Ezzeldin ◽  
Eslam W. Youssef ◽  
Ali Sultan-Qurraie ◽  
Eugene Lin ◽  
Osama O. Zaidat
Keyword(s):  
White Matter ◽  
Clinical Significance ◽  
Congenital Malformation ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Pediatric Population ◽  
Cerebral Arteries ◽  
Elastin Degradation ◽  
Intracranial Arteries ◽  
Anterior Posterior

The anterior cerebral artery (ACA) is a unique artery with many important variations with substantial clinical significance. Tortuous intracranial arteries usually occur in basilar, communicating, anterior, posterior cerebral arteries and in the white matter arterioles. This could happen for many reasons including but not limited to ageing, hypertension, patients with Moyamoya disease, congenital malformation, or increased flow associated with elastin degradation. While dolichoectasia of the ACA has been described even in children, to our knowledge, a serpiginous ACA without ectasia has not been reported, especially in the pediatric population.

scholarly journals Bilateral Infraoptic Origin of Anterior Cerebral Arteries: A Rare Anomaly and its Embryological and Clinical Significance

2006 ◽  
Vol 12 (2) ◽  
pp. 155-159 ◽  
Author(s):  
S. Chakraborty ◽  
N. F. Fanning ◽  
S. K. Lee ◽  
K.G. TerBrugge
Keyword(s):  
Clinical Significance ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Anatomical Variations ◽  
Anterior Communicating Artery ◽  
Aneurysm Formation ◽  
Rare Anomaly

We describe a case of bilateral infraoptic origin of the anterior cerebral arteries associated with an anterior communicating artery (ACOM) aneurysm. Anatomical variations of the anterior cerebral artery (ACA) are common; however, bilateral infraoptic course of the anterior cerebral artery is extremely rare. Since an infraoptic course of the ACA is associated with ACOM aneurysm formation, an understanding of the cerebrovascular anatomy and embryology is important for appropriate management of the aneurysm.

High-speed angiography of experimental head injury

1974 ◽  
Vol 41 (5) ◽  
pp. 523-530 ◽  
Author(s):  
Stanley A. Shatsky ◽  
Delbert E. Evans ◽  
Frederick Miller ◽  
Albert N. Martins
Keyword(s):  
Brain Injury ◽  
Cerebral Artery ◽  
Rhesus Monkeys ◽  
High Speed ◽  
Quantitative Measurement ◽  
Anterior Cerebral Artery ◽  
Head Injuries ◽  
Cerebral Arteries ◽  
Content Type ◽  
Intracranial Arteries

✓ Cineangiograms were performed at 1000 frames/sec in anesthetized rhesus monkeys during 4 meters/sec impact head injuries. Impacts that did not fracture the skull resulted in rapid transient movements of intracranial arteries. Lateral blows distorted the ipsilateral middle cerebral artery and reversibly displaced the anterior cerebral artery across the midline. Occipital blows distorted the peripheral branches of the middle and posterior cerebral arteries, and produced marked stretching of extracranial vessels. These data indicate that most of the intracranial movements hypothesized as etiological in brain injury occur in the first milliseconds following trauma. This technique makes possible quantitative measurement of these intracranial events and so may aid in the understanding of brain injury.

scholarly journals Study of variations of the anterior cerebral artery in human brain

2013 ◽  
Vol 02 (03) ◽  
pp. 122-127
Author(s):  
Bishwajeet Saikia ◽  
Kunjalal Talukdar ◽  
Joydev Sarma ◽  
Amitav Sarma ◽  
Sandeep Madaan
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Initial Step ◽  
Circle Of Willis ◽  
Anatomical Distribution ◽  
Surgical Interventions ◽  
Medical College ◽  
The Individual ◽  
Considerable Individual Variation

Abstract Background and aims: Stroke, the most frequent expression of cerebrovascular disease is one of the leading causes of death and disability throughout the world. The manifestations are largely accounted by the anatomical distribution of the stems and branches of the circle of Willis supplying the brain. Considerable individual variation exists in the pattern and caliber of the individual vessels forming the circle of Willis, which may possibly impair the collateral blood flow. The knowledge of these variations thus, becomes essential for medical as well as surgical interventions. There may possibly be some regional variations in the cerebral arteries not mentioned in standard available texts. Thus, the regional based study of variations present becomes essential. The present study aims to focus on the variation of one of such branches, the anterior cerebral artery (ACA) in the population of Assam, India. Material and Methods: The ACAs of 70 human cadaveric brains were examined by gross dissection in the department of Anatomy and Forensic medicine in Gauhati Medical College. Results: Hypoplastic A-1 segment were found in 7% cases, Hypoplastic A-2 segment in 2.85% cases, Buttonhole formation in 8.57% cases and aneurysmal dilatation in 1.42% cases. The results were compared with that of other authors and variations noted. Conclusion: The present study of ACA using gross dissection is an initial step in providing a reference to the healthcare professionals in the region of Assam. Based on this further studies using newer imaging methods should be carried out to correlate the manifestations clinically.

Characterization of AT2 angiotensin II receptors in rat anterior cerebral arteries

1991 ◽  
Vol 261 (3) ◽  
pp. H667-H670 ◽  
Author(s):  
K. Tsutsumi ◽  
J. M. Saavedra
Keyword(s):  
Angiotensin Ii ◽  
Cerebral Artery ◽  
Arterial Wall ◽  
Anterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Male Rat ◽  
At1 Antagonist ◽  
Maximum Inhibition ◽  
Old Rats

Quantitative autoradiography using the agonist 125I-Sar1-angiotensin II was used to localize and characterize angiotensin II (AT) receptors in the anterior cerebral artery of the male rat. This artery showed a moderately high number of AT receptors, localized throughout the arterial wall. The number of receptors was higher (125 +/- 7 fmol/mg protein) in arteries from young 2-wk-old rats compared with those in adult 8-wk-old rats (43 +/- 2 fmol/mg protein). In the anterior cerebral artery, AT binding was insensitive to displacement with the selective AT1 antagonist DuP 753 but was readily displaced by the selective AT2 antagonist CGP-42112 A (concentration eliciting 50% of maximum inhibition: 6 +/- 1 x 10(-10) M). This indicated that the AT receptors in the cerebral artery were of the AT2 subtype. Our observations suggest that AT may exert its effects on cerebral circulation by stimulation of AT2 receptors and that these receptors may play a role during cerebrovascular development.

scholarly journals Fenestrated Anterior Cerebral Artery with Associated Arterial Anomalies

2008 ◽  
Vol 14 (4) ◽  
pp. 441-445 ◽  
Author(s):  
S.J. Dimmick ◽  
K.C. Faulder
Keyword(s):  
Cerebral Aneurysm ◽  
Clinical Significance ◽  
Cerebral Artery ◽  
Cerebral Circulation ◽  
Anterior Cerebral Artery ◽  
Case Reports ◽  
Vascular Anomalies ◽  
Review Of The Literature ◽  
Aneurysm Formation ◽  
Arterial Anomalies

Fenestration of the A2 segment is extremely rare. Cerebrovascular fenestration may be associated with an increased incidence of cerebral aneurysm and other vascular anomalies. Two case reports are presented which identify a fenestration of the A2 segment and other normal variations of the intra-cerebral circulation. A review of the literature has been undertaken to determine the prevalence and embryology of anterior cerebral artery fenestrations, their clinical significance and the association with aneurysm formation and other intracranial vascular anomalies.

scholarly journals Anatomical variations of circle of Willis - a cadaveric study

2017 ◽  
Vol 4 (4) ◽  
pp. 1249 ◽  
Author(s):  
Ramanuj Singh ◽  
Ajay Babu Kannabathula ◽  
Himadri Sunam ◽  
Debajani Deka
Keyword(s):  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Anterior Part ◽  
Cerebral Arteries ◽  
Anatomical Variations ◽  
Circle Of Willis ◽  
Anterior Communicating Artery ◽  
Surgical Interventions ◽  
Collateral Channel ◽  
The Right

Background: The circle of Willis (CW) is a vascular network formed at the base of skull in the interpeduncular fossa. Its anterior part is formed by the anterior cerebral artery, from either side. Anterior communicating artery connects the right and left anterior cerebral arteries. Posteriorly, the basilar artery divides into right and left posterior cerebral arteries and each join to ipsilateral internal carotid artery through a posterior communicating artery. Anterior communicating artery and posterior communicating arteries are important component of circle of Willis, acts as collateral channel to stabilize blood flow. In the present study, anatomical variations in the circle of Willis were noted.Methods: 75 apparently normal formalin fixed brain specimens were collected from human cadavers. 55 Normal anatomical pattern and 20 variations of circle of Willis were studied. The Circles of Willis arteries were then colored, photographed, numbered and the abnormalities, if any, were noted.Results: Twenty variations were noted. The most common variation observed is in the anterior communicating artery followed by some other variations like the Posterior communicating arteries, Anterior cerebral artery and posterior cerebral artery (PCA) was found in 20 specimens.Conclusions: Knowledge on of variations in the formation of Circle of Willis, all surgical interventions should be preceded by angiography. Awareness of these anatomical variations is important in the neurovascular procedures.

scholarly journals Anisocoric pupil generated by azygos anterior cerebral artery: a case report

2017 ◽  
Vol 34 (01) ◽  
pp. 016-018
Author(s):  
J. Wichmann ◽  
G. Goulart ◽  
L. Xavier ◽  
G. Jotz ◽  
T. Malysz ◽  
...  
Keyword(s):  
Interventional Radiology ◽  
Case Report ◽  
Head And Neck ◽  
Clinical Data ◽  
Cerebral Artery ◽  
Anterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Anatomic Variations ◽  
Vascular Abnormality ◽  
Possible Cause

Abstract Introduction: In the embryonic period, several developmental anomalies of the cerebral arteries occur. The knowledge of these anatomic variations is important to avoid unnecessary surgery and to undergo surgery or interventional radiology with safety. Objective: In this report, we discuss the hypothesis of the presence of azygos anterior cerebral artery as a possible cause of anisocoric pupil found in a patient with 35 years old. To our knowledge, this variation has not been previously reported. Results: In this study we reported a case of this artery emphasizing some morphological, functional and clinical data about this rare vascular abnormality. Conclusion: The results could be important to offer useful information to anatomists, radiologists, ophthalmologists, neurologists and head and neck surgeons.

Decrease in Pulsatile Flow in the Anterior Cerebral Arteries in Infantile Hydrocephalus

PEDIATRICS ◽  
1982 ◽  
Vol 69 (1) ◽  
pp. 4-7
Author(s):  
Alan Hill ◽  
Joseph J. Volpe
Keyword(s):  
Cerebral Artery ◽  
Pulsatile Flow ◽  
Intraventricular Hemorrhage ◽  
Anterior Cerebral Artery ◽  
Cerebral Arteries ◽  
Critical Factor ◽  
Optimal Timing ◽  
Infantile Hydrocephalus ◽  
Arnold Chiari Malformation

The effect of ventriculomegaly with or without elevated intracranial pressure (ICP) on pulsatile flow in the anterior cerebral artery has been studied by a noninvasive Doppler technique in 11 infants with hydrocephalus. The cause of hydrocephalus was intraventricular hemorrhage in nine infants, Arnold-Chiari malformation in one, and bacterial meningitis in one. The pulsatility index (PI) (inversely related to pulsatile flow) was calculated from the systolic and diastolic amplitudes of flow in the anterior cerebral artery. All 11 patients with elevated PI had marked ventriculomegaly, and all but two had raised ICP. Four patients with massive ventriculomegaly and elevated ICP had maximal PI (ie, 1.00). The finding of elevated PI with ventriculomegaly and normal ICP, observed in two patients, suggested that ventriculomegaly is a more critical factor than ICP in the pathogenesis of the impaired flow. Treatment of ventriculomegaly in seven patients resulted in a decrease in PI. Of the four untreated patients, three died and one was not available for further study. Compromised flow in the anterior cerebral artery may be a sensitive barometer of impending ischemic injury with evolving ventriculomegaly, particularly following intraventricular hemorrhage. The PI may be a valuable parameter for the study of the mechanism of brain injury and for determination of optimal timing of corrective intervention.

Bilateral innervation of the cerebral arteries by the superior cervical ganglion in cats

1980 ◽  
Vol 53 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Jesús Marín ◽  
Mercedes Salaices ◽  
Fernando Rivilla ◽  
Javier Burgos ◽  
Emilio J. Marco
Keyword(s):  
Cerebral Artery ◽  
Superior Cervical Ganglion ◽  
Anterior Cerebral Artery ◽  
Contractile Response ◽  
Cerebral Arteries ◽  
The Other ◽  
Content Type ◽  
Cervical Ganglion ◽  
The Right ◽  
Fine Print

✓ The effect of removal of the left superior cervical ganglion on the contractile response to norepinephrine (NE) and 5-hydroxytryptamine (5-HT, serotonin) was studied in isolated segments of the middle cerebral artery (MCA) and posterior communicating artery (PCoA) of the cat. Fifteen days after the excision, each dose of NE elicited a potentiated response in both the MCA and the PCoA, whichever side they originated. By contrast, 5-HT induced enhanced vasoconstriction at each dose only in the MCA and PCoA from the left side. When segments of MCA and PCoA from the right side were challenged against 5-HT, a significantly increased response was found only at the first three doses. On the other hand, the NE content of pools made of MCA, PCoA, and anterior cerebral artery from each side was reduced to the same level on both sides after ganglion removal. These results indicate that the excised superior cervical ganglion innervated the MCA and PCoA from both sides of the circle of Willis.

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