SOME OBSERVATION ON HUMAN CLAVICLE

Bilodi A K S 1 , Sinha B N 1 , Kumaran S 1


INTRODUCTION
Clavicle is morphologically distinct bone.It is the first bone to ossify.Begins its ossification in membrane with two primary centers of ossification.Clavicles are absent from forelimbs in ungolates and carnivores but are well developed in prehensile limbs in primates and in man.Terry (1932) Oliver (1951), Jit & Singh (1966) In the present study: A random sample of 21 comprising 11 female & 10 males clavicles from bone sets that were available form department of Anatomy of Nepalgunj Medical College, Chisapani were studied.The clavicles were grouped into male and female by the measurement of mid shaft circumference.One pair of the clavicle showed too much of curvature and prominent conoid tubercle.This made us to examine the clavicle as whole and noted the characters in different clavicles.Bilodi et.al. : Some Observation on Human Clavicle...
• Three are having prominent conoid tubercle on left side in female.
• One on right side in male and 18 on right side in female have more prominent conoid tubercle.
• One on left side in male has more prominent conoid tubercle.Maximum curvature and prominent conoid tubercle are present one on left side and one on the right side of male of same body.B. Curvature is larger in male and female.

Table I: Classification according to curvatures
C. Table 2 shows the curvature index on both right and left clavicles.

Tabel II : Curvature index of Clavicle
Length of clavicle is increased by interstitial growth of terminal cartilage, which are zones of hypertrophy and advance endochondral ossification.
Following are length of clavicle both on right side and left side measured by calipers.

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100 Length of the base 6 .
Observations were made and results were tabulated.OBSERVATION Male -3 are on Left side, 7 on Right side Female-7 on Left side, 4 on Right sides A. Conoid tubercle is very much prominent in the following clavicles.

Table IV : Mid-shaft circumference Table V : Length weight and mid clavicular circumference of the clavicles
Right clavicle in longer than left (4).C.

In the Present study, the findings are:
• Mid shaft circumference in female is also lower than male in the present study.Bilodi et.al. : Some Observation on Human Clavicle...