Types of Joint Flashcards
What are two types of solid (immoveable) joints?
Fibrous + cartilaginous
What is the only category of moveable (cavitated joint)?
Synovial (6 different types)
Pivot (synovial)
A rounded bone fits into a ring of bone/cartilage, allows for rotation, eg. atlantoaxial joint in head/neck
Planar (synovial)
Between flat surfaces, allows gliding movements back and forth eg. acromioclavicular
Ball + socket (synovial)
Ball shaped bone fits into cup like depression, allows for internal/external rotation, flexion/extension, abduction/adduction (+ circumduction (when talking about shoulder)) eg. glenohumeral or acetabulofemoral joint
Hinge (synovial)
Convex surface fits into concave, allows for flexion and extension in a singular plane eg. ulnohumeral joint
Ellipsoid/condyle (synovial)
Oval shaped condyle fits into elliptical cavity, allows for flexion/extension, abduction/adduction and circumduction eg. radiocarpal
Saddle (synovial)
‘Saddle and rider’ shapes fit together, allows for flexion/extension, abduction/adduction eg. carpometacarpal (thumb)
What is a fibrous joint (+ example)?
Little/no movement and fibrous tissue holds articulating bones eg. in the skull
What is a cartilaginous joint (+ example)?
Little/no movement and cartilage holds articulating bones eg. intervertebral discs
What is a synovial joint?
Has a synovial cavity and can freely move