Description
structure and function of the vertebral column and human gait & posture.
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Explanation & Answer
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Anatomical structure of the spine
The spine is made of 33 individual bones stacked one on top of the other. This spinal column
provides the main support for your body, allowing you to stand upright, bend, and twist, while
protecting the spinal cord from injury. Strong muscles and bones, flexible tendons and ligaments,
and sensitive nerves contribute to a healthy spine. Yet, any of these structures affected by strain,
injury, or disease can cause pain.
What position has the largest compression force in the intervertebral disc
Intervertebral discs are pads of fibrocartilage which lie between the vertebrae of the spine.
The “compressive” force acting on an intervertebral disc is the resultant force acting down the
long axis of the spine, perpendicular to its mid-plane. Because the spine is curved, the direction
of the compressive force varies with spinal level, as well as with posture
he highest pressure that is placed on the disc of the lumbar spine occurs when you are in the
seated position and leaning forward, while bearing weight
The articulations of the atlanto-axial joints
The atlanto-axial joint is a joint between the first and second cervical vertebrae; the Atlas
and Axis. It is a complex joint made up of three synovial joints and constitutes the most mobile
articulation of the spine
There are two lateral atlanto-axial joints which are concave in an anterior-posterior direction, this
allows rotation.
The median atlantoaxial joint is the articulation of the: .
posterior surface of the anterior arch of atlas and the front of the odontoid process
anterior surface of the transverse ligament and the back of the odontoid process
Between the articular processes of the two bones there is on either side an arthrodial or gliding
joint.
Der...