CIRCLE OF WILLIS AND ITS VARIATIONS; MORPHOMETRIC STUDY IN ADULT HUMAN CADAVERS
Journal Title: International Journal of Medical Research & Health Sciences (IJMRHS) - Year 2014, Vol 3, Issue 2
Abstract
Background and Objectives: Circle of Willis plays a vital role in collateral circulation and redistribution of blood to all areas of the brain. Variation in circle of Willis is known to cause grave disorders like cerebrovascular disorders, subarachnoid haemorrhage, cerebral aneurysm and schizophrenia. The objectives of the present study are to study the formation and branching pattern of circle of Willis and also to study the distribution of variations. MATERIALS & Methods: The study was conducted on 50 adult brain specimens. Each brain was removed in one piece by dissection and the circle of Willis was observed for its formation, pattern and variations. Results: Among the 50 specimens studied, 28 cases (56%) had a normal pattern of circle of Willis and variations were observed in the remaining 22 cases (44%). More number of variations was observed on the right side than on the left side. The most common variation observed was hypoplastic posterior communicating artery (7 cases, 31.8%). Posterior communicating artery was found to be the most variable vessel while middle cerebral artery was the least variable vessel. Interpretation and Conclusion: The results with respect to the circle of Willis and all its component arteries were consistent with the results in the available literature. The only exception was the increased incidence of absence of both the anterior and posterior communicating arteries. This finding is of clinical significance to neurologists and neurosurgeons in this geographical location of north Karnataka. A higher incidence of variations in the communicating arteries is likely to manifest as a higher incidence in disorders like migraine, schizophrenia and cerebrovascular disorders due to compromised collateral circulation and poor redistribution of blood.
Authors and Affiliations
Raghavendra| Department of Anatomy, Akash institute of Medical Sciences & Research, Bangalore, Karnataka, India, Shirol VS| Department of Anatomy, J.N Medical College, Belgaum, Karnataka, India, Daksha Dixit| Department of Anatomy, J.N Medical College, Belgaum, Karnataka, India, Anil Kumar Reddy Y| Department of Anatomy, J N Medical College, Sawangi, Meghe, Wardha, Maharashtra, India, Corresponding author email: kumarlucky48@gmail.com, Desai SP| Department of Anatomy, J.N Medical College, Belgaum, Karnataka, India
Keywords
Related Articles
- EP ID EP11187
- DOI 10.5958/j.2319-5886.3.2.081
- Views 258
- Downloads 16
EARLY OCULAR FINDINGS IN A PATIENT OF MAROTEAUX-LAMY SYNDROME
The Maroteaux-Lamy disease or mucopolysaccharidosis type VI is an inherited severe metabolic disorder which is very rare. It is caused by a deficiency of the enzyme Arylsulfatase B and characterized by a heterogeneous c...
k-NN Based Classifcation of Brain MRI Images using DWT and PCA to Detect Different Types of Brain Tumour
The treatment of any tumour is completely depended what type it is. This paper proposes a set of algorithms which work for the better detection and classifcation of brain tumour. The MRI image based brain tumour analysi...
The relation between flexibility of human resources and performance indexes of selected hospitals of Tehran Medical Sciences University
Today, flexibility has turned to one of important issues in management theories and policies and most current discussions about flexibility patterns focus on management policies, so that these patterns are one of import...
RETAINED STONE PIECE IN ANTERIOR CHAMBER
We read with interest the article by Surekha et al. regarding the retained stone piece in anterior chamber.[1]Similar to the results of previous studies, the authors found that delayed intraocular foreign body (IOFB)...
EVALUATION OF RECEPTIVITY OF THE MEDICAL STUDENTS IN A LECTURE OF A LARGE GROUP
Background: Lecturing is widely used teaching method in higher education. Instructors of large classes may have only option to deliver lecture to convey informations to large group students.Aims and Objectives: The pre...