Friday, June 11, 2010

Bone Markings

There are two major types of bone markings. 
1. depressions and openings  (joints or allow for the passage of soft tissue)
2. processes or projections (outward growths that either form joints or serve as attachment points for connective tissue. 

The specific names and definitions of Depressions and Openings include:
Fissure: a narrow slit between adjacent parts of bones
Foramen: an opening that blood vessels, nerves and/or ligaments can travel through. 
Fossa: a shallow depression
sulcus: This is a furrow along a bone that accommodates a blood vessel, nerve or tendon. 
Meatus: tube-like opening

The specific names and definitions of Processes and Projections:
Joint forming Processes or Projections:
Condyle: a large round protuberance at the end of a bone
Facet: a smooth, flat articular surface
Head: a rounded articular projection supported on the neck of a bone

Processes that form attachment points for connective tissue:
Crest: is a prominent ridge or elongated projection
Epicondyle: the projection above (epi-) a condyle (a large round protuberance at the end of a bone)
Line (or Linea): a less prominent form of a crest
Spinous process: sharp, slender projection
Trochanter: very large projection
Tubercle: small, rounded projection
Tuberosity: larger rounded, but rough projection

Throughout the skeletal system, I'll be pointing out different bony landmarks using these terms, so remember them!

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