Which ligament checks atlanto occipital side flexion and rotation?
Which ligament checks atlanto occipital side flexion and rotation?
Atlantooccipital joint
| Type | Synovial ellipsoid joint; biaxial |
|---|---|
| Ligaments | Posterior atlantooccipital ligament, anterior atlantooccipital ligament |
| Innervation | C1 spinal nerve |
| Blood supply | Anastomosis between deep cervical, occipital and vertebral arteries |
| Movements | Principal movement; Flexion – extension Limited lateral flexion |
What is the movement of the Occipitalis?
The occipitalis muscle functions to move the eyebrows and scalp up and back and wrinkle the forehead, which are facial movements often used to make facial expressions when you are shocked or surprised.
What movement does the axis allow?
The axis is the second cervical vertebra; it has what is called the odontoid process about which the atlas rotates. The joint between the atlas and axis is a pivot type of joint. It allows the head turn from side to side.
What movements occur between the atlas C1 and the occiput?
The atlanto-occipital joint O-C1 The O-C1 joint is often thought of the main contributor to upper cervical flexion/extension and functionally assessed with nodding movements.
Where is the atlanto axial joint?
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 type of joint is atlanto axial joint?
synovial joint
Articular surfaces The median atlantoaxial joint is a pivot type of synovial joint. Broadly, the joint is formed by the dens of axis (odontoid process) surrounded by an osteoligamentous ring composed of the anterior arch of atlas anteriorly and the transverse ligament of atlas posteriorly.
What is the action of Epicranius Occipitalis?
The occipitalis controls backward movement of the scalp, which raises the eyebrows. The occipitalis and frontalis sections of the epicranial muscle coordinate movement with the help of a tendon that connects them.
Is atlanto occipital joint a hinge joint?
Arthiculation between the occipital condyles and the atlas vertebra forms a hinge joint.
Where is atlantoaxial joint?
cervical spine
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 articulates with the axis?
The axis is composed of a vertebral body, heavy pedicles, laminae, and transverse processes, which serve as attachment points for muscles. The axis articulates with the atlas via its superior articular facets, which are convex and face upward and outward.
What movement takes place between C1 and C2?
C1 serves as a ring or washer that the skull rests upon and articulates in a pivot joint with the dens or odontoid process of C2. Approximately 50% of flexion extension of the neck happens between the occiput and C1; 50% of the rotation of the neck happens between C1 and C2.
Where is the atlanto-axial joint?
