THE ANATOMICAL RAGE OF VARIATION SEEN IN THE ANTHROPOMETRY OF THE EAR AMONG IGBINEDION UNIVERSITY OKADA STUDENTS BETWEEN AGE 16-35

CHAPTER ONE
1.1 BACKGROUND OF THE STUDY

Roebuck et al noted that anthropometric data varies considerably
for individuals within a family or a nation and between nations.
Anthropometry refers to the measurement of living human body
dimensions for the purpose of understanding human body
physical variation as it plays an important role in plastic surgery,
prosthetics, and so on for data collection. Statistical data about the
distribution of body dimensions in the population are useful for
apparel sizing, forensics, and optimise products.
Many studies have defined human body parts and their
proportion to each other morphometrically. In humans, the ear is
the defining feature of the face and its structure shows signs of
sex and age. The human ear is divided into external, middle and
internal part. The pinna and external acoustic meatus forms the
external ear. The lateral surface of the pinna is irregularly concave,
faces slightly forward and displays numerous eminences and
depressions. These structures do not merely act as trumpets; they
are the first series of stimulus modifiers in the auditory apparatus.
(Standrings, 2008). The importance of anthropometric data was
stressed by Abeyshekera and Shahnavaz when they stated that a
piece of equipment designed to fit 90% of the male United States
population would fit about 90% of Germans, 80% Frenchmen,
65% of Italians, 45% of Japanese, 20% of Thais, and 10% percent
of Vietnamese. (Abeyshekera, 1989).
Saha observed that there were differences in anthropometric data
of people from different regions of India (Saha, 1985). Similarly in
Nigeria different regions of people presents different
anthropometric data. Jung and Jung surveyed the dimensions and
characteristics of Korean ears and found that age gender and
different ethnic populations were determinants of ear dimensions.
(Jung et al, 2003). A study carried out in India observed that
North-West Indians have smaller ear lobules when compared to
Caucasians and Japanese population but similar to those found
among the Onge tribe of the Andhra (India) and Newars of
Nepalby Sharma et al.
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