DSA Thoracic and Lumbar Spinal Mechanics Flashcards
What are the junctions that are present in the spine?
Craniocervical Cervicothoracic Thoracolumbar Lumbosacral
What are the points of the gravitational line?
External Auditory canal Head of the humerus L3 Anterior 1/3 of sacrum Lateral malleolus
What are the two parts of the back that are in lordosis? Kyphosis?
Lordosis: Cervical and lumbar Kyphosis: Sacral and thoracic
Describe the thoracic vertebrae in terms of 1. body 2. spinous process
1, medium sized, heart shaped, costal facets present 2. long, slope poster-inferiorly
Describe the lumbar vertebrae in terms of 1. body 2. spinous process
- large sized and kidney shaped 2. short and broad
Define a vertebral unit
Two adjacent vertebrae associated intervertebral disc
Describe the spinous processes of T1-T3, T12
Located at the level of the corresponding transverse process
Describe the spinous processes that are located at T4-T6, T11
Spinous processes are 1/3 of a segment below the corresponding transverse process
Describe the spinous processes that are located at T7-T9, T10
Spinous process located at the level of the spinous process as the one below
What is the superior fact orientation of the cervical vertebrae?
Backwards Upwards Medial
What is the superior fact orientation of the thoracic vertebrae?
Backwards Upwards Lateral
What is the superior fact orientation of the lumbar vertebrae?
Backwards Medial
Describe the anterior longitudinal ligament
strong, broad fibrous band that covers and connects the anterolateral aspects of the vertebral bodies and IV discs Limits extension
Describe the posterior longitudinal ligament
narrower, weaker band that runs within the vertebral canal along the posterior aspect of the vertebral bodies resists hyper flexion prevents posterior herniation of nucleus pulposus
Describe the ligamentous flava
Connects the lamina of the adjacent vertebrae
Describe the interspinous ligaments
Connects the adjoining spinous processes
Describe the inter transverse ligaments
connects the adjacent transverse processes
What are the transversespinalis muscles?
Rotatores (longus and brevis) Multifidus Semispinalis (semispinalis capitis, semispinalis cervicis, semispinalis thoracis)
Define coupled motion
consistent association of a motion along or about one motion with another motion occurring along a second axis The principle motion could not be produced without the associated motion happening as well
Who is Harrison Fryette?
A DO that described the physiologic motion of the spine published in 1918 developed 2 principles of spinal motion
______ ______ developed the third Fryette principle in 1948
C.R. Nelson
What is the first Fryette principle? (type 1 mechanics)
In the neutral range, side bending and rotation are coupled in opposite directions ***rotates towards the convexity (tends to be a group of vertebra)
What is the second Fryette principle? (type 2 mechanics)
Flexion or extension, and side bending and rotation are coupled in the same direction *** rotates toward the concavity (tends to be a single vertebrae)
What is Fryettes third principle?
Initating movement of a vertebral segment in any place will modify the movement of that segment in other planes of motion If motion is restricted in one motion it will be restricted in the other, and same with improvement


