Convex
Convex (Convexity): A shape is convex if at least part of it curves outward. That is, the outline or surface is curved like the external surface of a sphere or bowl. A simple mnemonic: think of "ex" in "convex" as meaning "out" or "outside."
- Opposite (Antonym): Concave
- Practice Specific Example: Convex/Concave Rule
For more examples of the use of these terms in anatomy (including video lectures), check out:
Examples of Concave and Convex Surfaces in the Human Body
Bone Landmark Terminology
- Fossa: A concave depression in a bone.
- Tubercle: A convex, rounded projection on a bone.
- Groove: A concave, linear depression in a bone.
- Condyle: A convex or spherical end of a bone.
Joints:
- Shoulder (Glenohumeral) joint: The glenoid fossa ("shoulder socket") is a concave surface, and the humeral head is a convex surface.
- Hip (Pelvifemoral) Joint: The acetabulum ("hip socket") is a concave surface, and the femoral head is a convex surface.
- Knee (Tibiofemoral) Joint: The tibial plateau is slightly concave (made "deeper" by the menisci), and femoral condyles are convex.
- Spine: Generally, the superior articular surface is slightly concave to receive the slightly convex inferior facet.