The atlantoaxial joint is a type of synovial joint that is classified as a biaxial, pivot joint. This joint resides in the upper part of the neck between the first and second cervical vertebrae, also known as the atlas and axis, respectively.
Contents
- 1 What does Atlantoaxial mean?
- 2 Is the atlantoaxial joint is a saddle joint?
- 3 What is the joint between the atlas and axis?
- 4 What movement does the atlanto occipital joint allow?
- 5 What joints have no movement?
- 6 Is atlantoaxial instability good?
- 7 What causes atlantoaxial subluxation?
- 8 What causes atlanto occipital dislocation?
- 9 Where is the atlanto axial joint located?
- 10 Is the atlanto-occipital joint concave or convex?
- 11 What is atlantoaxial dislocation?
- 12 What type of joint is the atlantoaxial joint quizlet?
- 13 Is the atlantoaxial joint uniaxial?
- 14 What is pivot joint?
What does Atlantoaxial mean?
Medical Definition of atlantoaxial: relating to or being anatomical structures that connect the atlas and the axis.
Is the atlantoaxial joint is a saddle joint?
Hyaline cartilage forms many menisci, such as are found in the temporomandibular joint and the knee joint. The atlantoaxial joint is a saddle joint.
What is the joint between the atlas and axis?
The joint between the atlas and axis is a pivot type of joint. It allows the head turn from side to side. It is also called the atloaxoid joint. The ligaments that serve to support and strengthen this joint are called the capsular; anterior and posterior atlantoaxial; and transverse ligaments.
What movement does the atlanto occipital joint allow?
The movements permitted in this joint are: (a) flexion and extension around the mediolateral axis, which give rise to the ordinary forward and backward nodding of the head. (b) slight lateral motion, lateroflexion, to one or other side around the anteroposterior axis.
What joints have no movement?
Fibrous joints – the bones of fibrous joints are joined by fibrous tissue, such as the sutures in the skull or the pelvis. Fibrous joints allow no movement at all. 2.
Is atlantoaxial instability good?
Prognosis is good for patients with symptomatic AAI in whom posterior spinal fusion is successful and function returns. Surgery may relieve pain, decrease myelopathy, or both in many patients, with results depending on the severity of symptoms and the cause of instability.
What causes atlantoaxial subluxation?
The causes of atlantoaxial subluxation may be multifactorial, including transverse ligament damage by a periodontoidal proliferative pannus or sequelae of ossification of the anterior and posterior longitudinal ligaments, associated inflammatory lesions (cervical spine osteoarthritis, atlantodental synovitis, erosions
What causes atlanto occipital dislocation?
Atlanto-occipital dislocation (AOD) is a devastating condition that frequently results in prehospital cardiorespiratory arrest and accounts for 15% of fatal spinal trauma. Atlanto-occipital dislocation occurs 5 times more commonly in children than adults, and is believed to be caused by hyperextension.
Where is the atlanto axial 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.
Is the atlanto-occipital joint concave or convex?
The atlantooccipital joint is the synovial articulation between the occipital bone and the first cervical vertebra (atlas). The articular surfaces are oval (elliptical) in shape and reciprocally concave-convex, with the concave articular facets of C1 vertebra articulating with the convex surfaces of the occipital bone.
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 type of joint is the atlantoaxial joint quizlet?
Atlanto-occipital/ Atlantoaxial Joint (Cervical Spine) Is a condylar synovial joint that permits flexion and extension of the cranium. This motion often noted when nodding the head to say “yes”. Plane synovial joints that permit flexion, extension, lateral flexion, and rotation of the cervical spine.
Is the atlantoaxial joint uniaxial?
Pivot Joint 3a). The bone rotates within this ring. 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.
What is pivot joint?
Pivot joints, also known as rotary joints, are a type of synovial joint that permit axial rotation. The moving bone rotates within a ring formed by the concave surface of a second bone and an adjoining ligament.
