Monocondylic articulation or joint

Definition

A hinge-like joint in which a single condyle (rounded articular process) on one segment articulates with a corresponding socket on the adjacent segment, permitting movement in essentially one plane.

Etymology

Example

The mandible of a honey bee articulates with the head capsule via a monocondylic joint, allowing only dorsoventral movement for chewing.

Synonyms

• monocondylic joint

Related Terms

• dicondylic articulation
• Condyle
• arthrodial membrane
• Mandible
• Coxa
• Trochanter

Usage Notes

Contrasts with dicondylic articulation, the more common two-condyle joint type in insects that permits greater rotational freedom. Monocondylic joints are relatively uncommon in the insect head; besides mandibles, they occur in some basal hexapods and certain leg joints in arachnids. The single condyle design sacrifices mobility for mechanical stability.