What limits spinal motion in the thoracic region?
the rib cage
In addition, the rib cage and ligament system limit the thoracic spine’s range of motion and protects many vital organs.
Which vertebral region has the best range of motion?
Frontal plane movement of the spine away from anatomical position is termed lateral flexion. The largest ROM for lateral flexion occurs in the cervical region with approximately 9-10 degrees of motion allowed at C4-C5.
What injury can occur when the neck undergoes sudden acceleration and deceleration such as in a car accident )?
A whiplash injury from an automobile accident is called a cervical acceleration–deceleration injury.
What is the result when part of the nucleus pulposus of the disc protrudes and presses on a nerve?
This common and painful disorder is called a herniated disc (also known as a ruptured disc or a prolapsed disc). The protrusion of the nucleus pulposus can press on a nerve root or the spinal cord. The damaged disc can also leak fluid, which may inflame nerve roots.
What movement plane is the thoracic spine?
Thoracic spine showed ROM in sagittal plane, despite being considered a stable region.
What movement occurs in thoracic vertebrae?
motion: lateral flexion and rotation; no flexion/extension.
What is thoracic movement?
The angles of the joints in the thoracic spine allow for motion in all planes: rotation, flexion/extension, and lateral flexion. However, the ribs block excessive lateral flexion from occurring. Sagittal plane flexion and extension is also available in the region of the thoracic spine.
What is thoracic vertebra?
Thoracic vertebrae are the twelve vertebral segments (T1-T12) that make up the thoracic spine. These structures have very little motion because they are firmly attached to the ribs and sternum (breastbone).
Which of the following muscles are responsible for the lateral flexion of the vertebral column quizlet?
When acting only on one side of the spinal column (left or right), the quadratus lumborum laterally flexes the lumbar spine.
What are the movements of the cervical spine?
The cervical spine’s range of motion is approximately 80° to 90° of flexion, 70° of extension, 20° to 45° of lateral flexion, and up to 90° of rotation to both sides.
What does the nucleus pulposus represent?
Nucleus pulposus is the inner core of the vertebral disc. The core is composed of a jelly-like material that consists of mainly water, as well as a loose network of collagen fibers. The elastic inner structure allows the vertebral disc to withstand forces of compression and torsion.
Why does the nucleus pulposus usually herniate in this direction?
Nucleus pulposus herniation results from a failure in the annulus fibrosis integrity, making the content of the nucleus to protrude into the neural canal, the intervertebral foramen (foraminal) or lateral to the foramen (extraforaminal).
What is the spinous process of thoracic vertebrae?
Spinous Processes. The spinous processes of thoracic vertebrae generally are large (Fig. 6-1, B and E). The upper four thoracic spinous processes project almost directly posteriorly. The next four (T5 through T8) project dramatically inferiorly. The spinous process of T8 is the longest of this group.
What is the function of the last four thoracic spinous processes?
The last four thoracic spinous processes begin to acquire the characteristics of lumbar spinous processes by projecting more directly posteriorly and being larger in their superior-to-inferior dimension (see Unique Thoracic Vertebrae). The spinous processes of thoracic vertebrae serve as attachment sites for many muscles and ligaments.
What is the function of the spinous process in the spine?
The spinous processes throughout the spine function as a series of levers both for muscles of posture and for muscles of active movement (Standring et al., 2008). Most of the muscles that attach to the spinous processes act to extend the vertebral column.
What muscles are attached to the spinous process?
Some muscles attaching to the spinous processes also rotate the vertebrae to which they attach. Lateral to the spinous processes are the vertebral grooves. These grooves are formed by laminae in the cervical and lumbar regions. They are much broader in the thoracic region and are formed by both the laminae and transverse processes.