Clavicle Flashcards
The clavicle and scapula articulate with each other at the
acromioclavicular joint
The two halves of the shoulder girdle are connected to sternum at
sternoclavicular joints
the clavicle is
anterior of the shoulder girdle and subcutaneous
how does the clavicle differ from other bones?
- it has no medullary cavity
- formed by membranous ossification (first bone to ossify in embryo)
- only long bone placed horizontally
lateral end of clavicle is _____ and has ______
flattened and has small oval articular facet to articulate with acromion at acromio-clavicular joint
articulate
form a joint
articular facet
where 2 structures meet
medullary cavity
cavity where bone marrow is stored
subcutaneous
under the skin
lateral end of clavicle is also called
acromial end
medial end of clavicle
enlarged (prismatic) and articulate with sternum at sternoclavicular joint
medial end of clavicle is also called
sternal end
lateral 1/3 of shaft VS medial 2/3 of shaft
lateral- convex backward to meet scapula
medial - convex forward to give passage for nerves and vessels
lateral 1/3 features of shaft in clavicle
Anterior Border
Lower Surface
Flattened
Anterior Border: Deltoid Tubercle
Lower Surface: Conoid Tubercle & Trapezoid Ridge
Conoid Tubercle
lyes close to posterior border. Junction of lateral third with medial two thirds of clavicle.
Trapezoid Ridge
extends forward and laterally from conoid tubercle towards acromial end
medial 2/3 of shaft of clavical
shape
lower surface
cylindral
lower surface has:
rough impression near sternal end that gives attachment to costo-clavicular muscle
groove in middle (longitidual) in middle third of bone for insertion of subclavius muscle
nutrient foramen (lateral)
