Affiliation:
1. Assistant Professor, Department of Anatomy, Sree Gokulam Medical College & Research Foundation Venjaramoodu, Trivandrum, Kerala
2. Professor and Head, Department of Radiodiagnosis, Sree Gokulam Medical College & Research Foundation Venjaramoodu, Trivandrum, Kerala.
Abstract
Introduction In the adult human brain, there are four connected ventricles - two lateral ventricles within the cerebrum, a midline third ventricle
between the right and left thalami, and a midline fourth ventricle lying between the cerebellum posteriorly and the pons and medulla anteriorly1.
Evans index is the ratio of the maximum width of the anterior horn of the lateral ventricle to the maximum transverse diameter of the inner table of
the skull. A clear understanding of the normal values of Evans index and variations of the ventricular system of brain is useful for clinicians,
radiologists and neurosurgeons in their daily clinical practice2. To determine Aims And Objectives the normal values of Evans index using
Computerized tomography of brain in South Kerala population. The study was conducted in indi Materials And Methods viduals who attended the
Department of Radiodiagnosis in Government Medical College, Thiruvananthapuram. Those patients whose brain CT scans were read as normal
by the radiologist were taken up for the study, during the period from January 2019 to June 2020. A total of 200 CT brain of individuals above 10
years of age were taken.100 males and 100 females were included in the study group. Results The mean Evans index in the study was found to be
0.258±0.05 in males, 0.255±0.03 in females and an overall mean of 0.256±0.04 was calculated. Conclusion The present study shows that Evans
index was more in individuals who were above 60 years in both males and females. Knowledge of Evans index will help in the diagnosis of
idiopathic normal pressure hydrocephalus and in the assessment of outcome of patients with ventriculoperitoneal shunt placement.
Subject
Visual Arts and Performing Arts,Communication,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Computer Science Applications,Mechanical Engineering,Transportation,Cardiology and Cardiovascular Medicine,Molecular Biology,Molecular Biology,Structural Biology,Catalysis,General Engineering,Physical and Theoretical Chemistry,Process Chemistry and Technology,Catalysis,Process Chemistry and Technology,Biochemistry,Bioengineering,Catalysis,Cell Biology,Genetics,Molecular Biology,General Medicine
Reference19 articles.
1. Williams PL, Bannister LH, Berry MM, Collins P, Dyson M, Dussek JE, et al. Gray’s Anatomy. The Anatomical basis of Medicine and Surgery. 38th ed. Edinburgh: Elsevier Churchill Livingstone; 1995. pp. 1205-9.
2. Srijit D, Shipra P. Anatomical study of anomalous posterior horn of lateral ventricle of brain and its clinical significance. British Lek Listy 2007; 108(9):422-4.
3. Schochet SS. Neuropathology of aging. Neurologic clinics 1998;16:569-80.
4. Morel F, Wildi E. The capacity of cerebral ventricles in relation to age and the presence of senile plaques and Alzheimer's modifications]. Schweizer Archiv fur Neurologie und Psychiatrie Archives suisses de neurologie et de psychiatrie Archiviosvizzero di neurologia e psichiatria 1953;72:211-17
5. Tomlinson BE, Blessed G, Roth M. Observations on the brains of demented old people. Journal of the Neurological Sciences 1970;11:205-42