DocGuy
ANATOMY
Medicine Made Simple
, Bones of Upper Limb
Clavicle
Long bone – shaft, medial & lateral ends
Transmits weight from upper limb to sternum .
Side determination
- Lat. End – flat
Med. End – large, quadrilateral
- Med. 2/3 of shaft – convex forwards
Lat. 1/3 of shaft – concave forwards
- Inf. Surface – middle 1/3 – presence of a longitudinal groove (Groove for Subclavius)
- Conoid tubercle and trapezoid ridge- for 2 parts of coracoclavicular ligament
Special features
- Only long bone which lies horizontally
- Subcutaneous throughout
- 1st bone to start ossifying
- Only long bone which has a membranous ossification
- Only long bone which has 2 primary centers of
ossification
- Generally, has no medullary cavity
- The supraclavicular nerves crossing it can be rolled
against the bone
Shaft
o Lateral 1/3
Flattened from above downwards
Anterior border concave forwards, posterior
border convex backwards
Superior surface is subcutaneous, inferior
surface has an elevation – conoid tubercle, and
a ridge- trapezoid ridge
o Medial 2/3
Rounded
Anterior surface convex forwards
1
ANATOMY
Medicine Made Simple
, Bones of Upper Limb
Clavicle
Long bone – shaft, medial & lateral ends
Transmits weight from upper limb to sternum .
Side determination
- Lat. End – flat
Med. End – large, quadrilateral
- Med. 2/3 of shaft – convex forwards
Lat. 1/3 of shaft – concave forwards
- Inf. Surface – middle 1/3 – presence of a longitudinal groove (Groove for Subclavius)
- Conoid tubercle and trapezoid ridge- for 2 parts of coracoclavicular ligament
Special features
- Only long bone which lies horizontally
- Subcutaneous throughout
- 1st bone to start ossifying
- Only long bone which has a membranous ossification
- Only long bone which has 2 primary centers of
ossification
- Generally, has no medullary cavity
- The supraclavicular nerves crossing it can be rolled
against the bone
Shaft
o Lateral 1/3
Flattened from above downwards
Anterior border concave forwards, posterior
border convex backwards
Superior surface is subcutaneous, inferior
surface has an elevation – conoid tubercle, and
a ridge- trapezoid ridge
o Medial 2/3
Rounded
Anterior surface convex forwards
1
