ANATOMY OF CLAVICLE BONE (PART - 1)


INTRODUCTION
:-

• long S shaped bone. 
• Supports shoulder that arms can swing away from the trunk. 
• Transmits weight of the limb to the sternum. 
• Only long bone that lies horizontally and ossifies in membrane. 
• subcutaneous. 
• First bone to start ossifying. 

BONE DIVISION

1. Cylindrical shaft
2. Two ends lateral and medial. 

 GENERAL FEATURES

 SHAFT:- divided in two parts medial 2/3rd and lateral 1/3rd

 1. LATERAL 1/3rd :- 

 •Flattened from above downwards. 
 •Two borders 
 1. Anterior :- concave forwards
 2. Posterior :- convex backwards
 • Two surfaces:- 
 1. Superior :- subcutaneous 
 2. Inferior :- presents elevation called CONOID TUBERCLE and TRAPEZOID RIDGE. 
 2. MEDIAL 2/3rd :- rounded having four surfaces. 
 1. Anterior :- convex forwards
 2. Posterior :- smooth
 3. Superior :- Rough in its medial part
 4. Inferior :- Rough oval impression at the medial end. Longitudinal subclavian groove at lateral half. Nutrient foramen at lateral end of groove. 

  LATERAL AND MEDIAL ENDS:-

 1. Lateral end :-

• Known as Acromial end.
• Flattened from above downwards. 
• Bears facet for articulation with the acromion process of scapula to form ACROMIOCLAVICULAR JOINT. 

2. Medial end :- 

• Known as sternal end. 
• Quadrangular and articulates with the clavicular notch of the manubrim sterni to form STERNOCLAVICULAR JOINT. 
• Articular surface extends to the inferior aspect for articulation with the FIRST COASTAL CARTILAGE. 

SIDE DETERMINATION:-

• lateral end flat and medial end quadrangular and large. 
• curved shaft:- 
1. Convex forwards medial 2/3rd .
2. Concave forwards lateral 1/3 rd.
• Inferior surface is grooved longitudinally in middle 1/3 rd. 

SEX DETERMINATION:-

• Females:- Shorter, lighter, thinner, smoother and less curved than in males. 
• females:- lateral end little below medial end but in males both ends are at same level or either slightly higher than medial end. 

 
 
                  

Comments

Popular posts from this blog

Polycystic ovarian syndrome in Ayurveda

DYSFUNCTIONAL UTERINE BLEEDING

AMALAKI-EMBLICA OFFICINALIS

VIRUDDHA AAHARA

AGARU-AGARWOOD

ANATOMY OF CLAVICLE BONE ( PART -2 ) MUSCLE ATTACHMENTS AND OSSIFICATION

DYSMENORRHEA - PERIOD CRAMPS ACCORDING TO AYURVEDA