Articulations Flashcards
Synarthrosis
Immobile joints like the sutures found between the bones of the cranium
Amphiarthrosis
Joints that allow a slight amount of movement like the intervertebral discs made of fibrocartilage found between the bodies of adjacent vertebrae
Diarthrosis
Freely movable articulations and include many familiar examples such as the elbow, shoulder, and knee
Fibrous Joints are:
held together by dense fibrous CT
Suture
fibrous synarthrosis
Syndesmosis
ligament connects bones
Gomphosis
Ligament holds teeth to dental alveoli
Synostosis
Two bones fuse
Cartiliginous Joint
Held together by cartilage
Synchondrosis
Cartilaginous synarthrosis
Symphysis
Amphiarthroses of fibrocartilage
Synovial Joint
Capsule of fibrous CT surrounding a fluid filled mcavity
Flexion
Moves away from anatomical postion through sagittal plane
Extension
Opposite of flexion returns to anatomical postion
Dorsiflextion
Raises the toes superiorly
Plantar flexion
Pushes toes inferiorly
Abduction
Move away from the longitudinal axis in frontal plane
Adduction
Opposite of abduction returns to anatomical position
Rotation
Turn around long axis of bone. The head is along the midline so we can rotate the head left or right. The limbs can rotate lateral away from the midline or medial towards the midline
Pronation
Medial rotation of forearm
Supination
Opposite of pronatation returns to anatomical postition
Elevation
Raise superior
Depression
lower inferior, opposite of elevation
Pivot Joint
Allows roatation only
Hinge Joint
Allows angular motion of flextion/extension
Saddle Joint
Surface concave on one axis convex on other enables flexion and abduction
Plane Joint
Allows a small amount of sliding
Condyloid Joint
Oval Face in a depression allows flextion an abduction
Ball & Socket
Flextion, abduction, rotation, and circumduction
