Flashcards in Thoracic Spine - Review Deck (87)
What structures provide strengthening and stabilizing forces to, and affect the motion of the T-spine?
- The ribs
Do inter-rib motions, or intervetebral motions stop first?
- Inter-rib stops first
What arthrokinematic motion occurs in the T-spine at the end range of osteokinematic motions?
- Motion of transverse process on a fixed rib
What type are the arthrokinematics relationships of the joint surfaces of the costotransverse joints?
- Convex rib on concave transverse process for ribs 1 - 7/8
- Planar surfaces for ribs 8 - 10
What is the ROM for T-spine flexion? (goniometry and tape changes)
- 0 - 25/45 degrees
- ~ 2.7 cm
What 4 structures limit an opening semental motion of the T-spine?
- Capsular ligaments
- Posterior longitudinal ligament
What type of force is produced on the nucleus pulposis during T-spine flexion?
At what 3 joints does motion occur during flexion of the T-spine?
What is the ROM for T-spine extension? (goniometry and tape changes)
- 0 - 25/45 degrees
- ~ 2.5 cm
What limits segmental T-spine extension/ closing?
- Approximation of spinous processes
What type of force is produced on the nucleus pulposis during T-spine extension?
- Anterior force
At what 3 joints does motion occur during extension of the T-spine?
What is normal ROM lateral flexion of the T-spine? (goniometry only)
- 0 - 20/40 degrees
What type of force is produced on the nucleus pulposis during lateral flexion of the T-spine?
- Lateral force
What type of motion occurs at the intercostal spaces during lateral motion on the convex and on the concave side?
Convex: Widen, enlarging rib cage
Concave: Close, shrinking rib cage
What is the normal ROM of rotation of the T-spine? (goniometry only)
- 0 - 35/50 degrees
What limits the opening and closing motions of the T-spine during rotation?
- Rib cage deformations
Through what structures of the T-spine does the axis of rotation pass?
- The bodies of the vertebrae
What motion occurs at the disc during T-spine rotation? What effect does this have in comparison with the L-spine?
- Disc twists and rotates as opposed to shearing in the lumbar spine allowing for greater rotation ROM per segment
How much rotation is allowed per segment in the T-spine? The L-spine?
T-spine: 3 degrees
L-spine: 1 degree
What are the joint surfaces of the costovertebral joint?
- Convex rib on both vertebral bodies, and the annulus of the disc
What structure divides the inside of the joint capsule of the costovertebral joint into 2 sections?
- An interosseus ligament
What ligament reinforces the joint capsule of the costovertebral joint?
- Annular ligament
What are the joint surfaces of the costotransverse joints?
1 - 7/8: convex rib tubercle on concave transverse process
8 - 10: Transverse surfaces
What 3 ligaments stabilize ribs 8 - 10?
- Posterior costotransverse
- Superior costotransvserse
Through what joints does rib motion occur?
Describe the 4 planes of motion of the ribs?
Upper ribs: In sagittal plane (raises sternum and expands AP dimension of rib cage
Middle ribs: 45 degrees to frontal plane
Lower ribs: In frontal plane (Medial lateral expansion of the rib cage )
What type of motion occurs at the Lower ribs?
What type of motion occurs in the inferior ribs?