The atlantoaxial joint is a type of synovial joint
What is the atlantoaxial joint and what does it do?
TypeAtlantoaxial joint complex: Synovial joint; biaxialBlood supplyDeep cervical, occipital, vertebral arteries
Is atlantoaxial joint ball and socket?
The different types of synovial joints are the ball-and-socket joint (shoulder joint), hinge joint (knee), pivot joint (atlantoaxial joint, between C1 and C2 vertebrae of the neck), condyloid joint (radiocarpal joint of the wrist), saddle joint (first carpometacarpal joint, between the trapezium carpal bone and the …
Is the atlantoaxial joint a facet joint?
Atlantoaxial (C1-C2) facet joint osteoarthritis: a distinctive clinical syndrome. Arthritis Rheum.What are the symptoms of atlantoaxial instability?
Neurologic manifestations include clumsiness, lack of coordination, abnormal gait, difficulty walking, easy fatigability, neck pain, limited next mobility, torticollis, sensory deficits, neurogenic bladder, upper motor neuron signs (spasticity, hyperreflexia, clonus, Babinski sign), paraplegia, hemiplegia, and …
What movement does the atlanto-occipital joint allow?
The principal movement at the atlantooccipital joint is flexion-extension. This movement permits nodding of the head, as seen when indicating approval (the “yes” movement).
Is the atlanto-occipital joint biaxial?
∘ Articulates with occipital condyle forming atlanto-occipital joint: Biaxial condyloid synovial joint: fluid-filled articulations involving occipital condyles that allow movement in two planes. Permits flexion and extension; minimal lateral bending and rotation.
What is atlantoaxial dislocation?
Atlantoaxial dislocation refers to a loss of stability between the atlas and axis (C1–C2), resulting in loss of normal articulation (Fig. 1). The atlantoaxial joints can lose stable articulation from traumatic, inflammatory, idiopathic, or congenital abnormalities.What is atlantoaxial degeneration?
What is atlantoaxial osteoarthritis? Atlantoaxial osteoarthritis is osteoarthritis of the joint between the two upper vertebrae in your neck (called the ‘atlas’ and the ‘axis’), which may cause cervicogenic headache.
Where is the posterior atlantoaxial ligament?The posterior atlantoaxial ligament is a broad, thin membrane attached, above, to the lower border of the posterior arch of the atlas; below, to the upper edges of the laminæ of the axis. It supplies the place of the ligamenta flava, and is in relation, behind, with the Obliqui capitis inferiores.
Article first time published onWhere is atlantoaxial joint located?
The C1 C2 spinal motion segment, also called the atlantoaxial joint, is located in the upper portion of the cervical spine. It consists of the C1 and C2 vertebrae, and the anatomical structures connecting them. This segment provides rotational motion, supports the head, and protects the spinal cord and nerve pathways.
What is pivot joint?
pivot joint, also called rotary joint, or trochoid joint, in vertebrate anatomy, a freely moveable joint (diarthrosis) that allows only rotary movement around a single axis. The moving bone rotates within a ring that is formed from a second bone and adjoining ligament.
What stabilizes the hip joint?
The iliofemoral, pubofemoral and ischiofemoral ligaments are very strong, and along with the thickened joint capsule, provide a large degree of stability. These ligaments have a unique spiral orientation; this causes them to become tighter when the joint is extended.
How is atlantoaxial subluxation diagnosed?
Subluxation of C1 on C2, referred to as atlantoaxial subluxation, can be quantified by a measurement made between the back of the anterior arch of C1 and the front of the dens or odontoid. This distance is referred to as the atlas-dens interval (ADI).
Is KFS hereditary?
In most cases, Klippel Feil syndrome (KFS) is not inherited in families and the cause is unknown. In some families, KFS is due to a genetic alteration in the GDF6, GDF3 or MEOX1 gene and can be inherited. When KFS is caused by mutations in the GDF6 or GDF3 genes, it is inherited in an autosomal dominant manner.
How do you assess for atlantoaxial instability?
The patient is asked to slowly flex the head performing a slight cervical nod, at the same time the examiner presses posteriorly on the patient’s forehead. A sliding motion of the head in relation to the axis indicates atlantoaxial instability.
Is atlanto-occipital joint a hinge joint?
Atlanto-occipital jointLatinArticulatio atlantooccipitalisMeSHD001269TA98A03.1.08.001TA21630
Is the atlantoaxial joint Diarthrotic?
Since the rotation is around a single axis, pivot joints are functionally classified as a uniaxial diarthrosis type of joint. An example of a pivot joint is the atlantoaxial joint, found between the C1 (atlas) and C2 (axis) vertebrae. … Rotation at this joint allows you to turn your head from side to side.
What does atlanto-occipital mean?
Medical Definition of atlanto-occipital : relating to or being structures (as a joint or ligament) joining the atlas and the occipital bone The atlanto-occipital joint straddles the spinal cord and the foramen magnum on either side and is V-shaped, slanting caudally and medially.—
What are Craniovertebral joints?
Craniovertebral Joints A craniovertebral joint is exactly what it sounds like: a joint that permits movement between the vertebral column and the skull. The ligaments in the spine support and reinforce the joints between the vertebrae. The atlas and axis in particular work with the ligaments to move the neck.
What bones make up the sternoclavicular joint?
The sternoclavicular (SC) joint is the linkage between the clavicle (collarbone) and the sternum (breastbone).
What is a joint?
Joints are where two bones meet. They make the skeleton flexible — without them, movement would be impossible. Joints allow our bodies to move in many ways.
Why can injuries at C1 or C2 be fatal?
If the spinal cord becomes compressed at the C2 level, it can cause pain, tingling, numbness, and/or weakness in the arms or legs, loss of bowel and/or bladder control, and other problems. Severe cases of spinal cord injury at C2 can be fatal because breathing and other critical body functions may be impaired or stop.
What is Thoracic Osteophytosis?
Vertebral osteophytosis is a proliferation of bone that occurs within the intervertebral ligaments at their insertions into the apophyseal rings of the vertebral bodies and gives the effect of lipping in roentgenograms. It is sometimes asymptomatic.
What is reversal of cervical lordosis?
To reiterate, a reversal of cervical lordosis occurs when the cervical spine’s vertebrae bend in the wrong direction. While lordosis refers to the spine’s inward curvatures that form a soft ‘C’ shape, kyphosis refers to the opposite curvature type that bends outwards in a reverse ‘C’ shape.
What is the posterior atlanto-occipital membrane?
The posterior atlantooccipital membrane (posterior atlantooccipital ligament) is a broad but thin membrane. It is connected above to the posterior margin of the foramen magnum and below to the upper border of the posterior arch of the atlas. It is a continuation from the Ligamentum Flavum.
What are the collateral ligaments of the knee?
The collateral ligaments of the knee are located on the outside part of your knee joint. They help connect the bones of your upper and lower leg, around your knee joint. The lateral collateral ligament (LCL) runs on the outer side of your knee. The medial collateral ligament (MCL) runs along the inside of your knee.
What kind of joint is the intervertebral joint?
Intervertebral discs are made of fibrocartilage and thereby structurally form a symphysis type of cartilaginous joint.
What joints have no movement?
Immovable or fibrous joints are those that do not allow movement (or allow for only very slight movement) at joint locations. Bones at these joints have no joint cavity and are held together structurally by thick fibrous connective tissue, usually collagen. These joints are important for stability and protection.
What are ligaments?
A ligament is a fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable.
What type of joint is the hip?
The hip joint is a ball-and-socket joint that allows motion and gives stability needed to bear body weight. The socket area (acetabulum) is inside the pelvis. The ball part of this joint is the top of the thighbone (femur). It joins with the acetabulum to form the hip joint.
