annulus fibrosus

(redirected from Fibrous ring)

annulus fibrosus

The tough fibrous outer zone of the intervertebral disc that normally retains the soft inner nucleus pulposus. Weakness of the annulus fibrosus allows prolapse of the pulpy centre in the condition inaccurately known as ‘slipped disc’.

annulus fibrosus

the fibrous ring which encircles each intervertebral disc.

annulus fibrosus

fibrocartilage ring forming the outer part of an intervertebral disc (see disc)
References in periodicals archive ?
The Sapien THV is approved for patients who are not eligible for open-heart surgery for replacement of their aortic valve and have a calcified aortic annulus (calcium build-up in the fibrous ring of the aortic heart valve).
The labrum is a fibrous ring of cartilage attached to the rim of the hip socket that helps stabilize the joint.
When they become diseased (due to infection, damage from a heart attack, a congenital condition or other cause), the shape of the valve's annulus, a fibrous ring that surrounds the opening of the valve, can change.
Falling on an outstretched arm or hurling a fastball can cause a tear in the labrum, the fibrous ring that holds the humerus, or upper arm bone, in the shoulder socket.