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Radiographic Anatomy
of Thoracic, Lumbar,
Sacrum and Coccyx
Spine
Chandan Prasad Rajbhar
Tutor
College of paramedical sciences
TMU, Moradabad
Thoracic spine
• The next twelve vertebrae are
the thoracic vertebrae, and each
of these connects to a pair of
ribs.
• Because all vertebrae are
posterior or dorsal in the body,
the term thoracic is more correct
for describing this region than
the older term, dorsal spine.
Characteristics
• RIB ARTICULA TIONS
• An important distinguishing
feature of all thoracic
vertebrae is their facets for
articulation with ribs.
• Costovertebral Joints Each
thoracic vertebra has a full
facet or two partial facets,
called demi facets, on each
side of the body. Each facet or
combination of two demi
facets accepts the head of a
rib to form a costovertebral
joint
• The main anatomical components of a thoracic vertebra are:
• Body
• Spinous process
• Costal facets: transverse costal facet, superior costal facet, and inferior costal
facet
• Transverse process
• Superior and inferior articular facets
• Lamina
• Intervertebral foramen
• Vertebral foramen
• Muscles affecting thoracic vertebrae function
• Spinalis muscle
• Longissimus muscle
• Distinguish Features
• Presence of facets for the joints with the ribs (all except the 11th and 12th
vertebra).
• Spinous processes are more pointed than other vertebrae and angle sharply
downward.
• The body is smaller than in lumbar, but larger than in the cervical vertebrae.
Lumbar Spine
• The lumbar vertebrae are located
at the bottom section of the
vertebral column, inferior to the rib
cage and superior to the pelvis and
sacrum.
• Since these vertebrae are most
largely responsible for bearing the
weight of the upper body (and
permitting movement),
• They are logically also the largest
segments of the vertebral column.
• The largest individual vertebrae
are the five lumbar vertebrae
Lateral view
Posterior and Anterior
view
Superior View
Muscles affecting Lumbar vertebra
• Longissimus muscle
• Spinalis muscle
• Multifidus muscle
• Intertransversarii muscle
• Psoas major
Sacrum
• The sacrum is inferior to the lumbar vertebrae.
• Structures present anteriorly
• Ala
• Pelvic sacral foramina
• Body
• apex
• Lateral aspect of sacrum
• A. articulation surface
• B. Sup. articular process
• C. Median sacral crest
• D. Sacral horn
• E. Sacral canal
Coccyx Bone.
• The coccyx (also known as
the tailbone) is the terminal
part of the vertebral column. It
is comprised of four vertebrae,
which fuse to produce a
triangular shape.
• Joints
• The coccyx articulates with the
sacrum at a fibro cartilaginous
joint called the
sacrococcygeal symphysis.
Lateral view of
sacrum and coccyx
Thank You

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Radiographic anatomy of thoracic,lumbar spine, sacrum and coccyx

  • 1. Radiographic Anatomy of Thoracic, Lumbar, Sacrum and Coccyx Spine Chandan Prasad Rajbhar Tutor College of paramedical sciences TMU, Moradabad
  • 2. Thoracic spine • The next twelve vertebrae are the thoracic vertebrae, and each of these connects to a pair of ribs. • Because all vertebrae are posterior or dorsal in the body, the term thoracic is more correct for describing this region than the older term, dorsal spine.
  • 3. Characteristics • RIB ARTICULA TIONS • An important distinguishing feature of all thoracic vertebrae is their facets for articulation with ribs. • Costovertebral Joints Each thoracic vertebra has a full facet or two partial facets, called demi facets, on each side of the body. Each facet or combination of two demi facets accepts the head of a rib to form a costovertebral joint
  • 4. • The main anatomical components of a thoracic vertebra are: • Body • Spinous process • Costal facets: transverse costal facet, superior costal facet, and inferior costal facet • Transverse process • Superior and inferior articular facets • Lamina • Intervertebral foramen • Vertebral foramen
  • 5. • Muscles affecting thoracic vertebrae function • Spinalis muscle • Longissimus muscle • Distinguish Features • Presence of facets for the joints with the ribs (all except the 11th and 12th vertebra). • Spinous processes are more pointed than other vertebrae and angle sharply downward. • The body is smaller than in lumbar, but larger than in the cervical vertebrae.
  • 6. Lumbar Spine • The lumbar vertebrae are located at the bottom section of the vertebral column, inferior to the rib cage and superior to the pelvis and sacrum. • Since these vertebrae are most largely responsible for bearing the weight of the upper body (and permitting movement), • They are logically also the largest segments of the vertebral column. • The largest individual vertebrae are the five lumbar vertebrae Lateral view
  • 8. Muscles affecting Lumbar vertebra • Longissimus muscle • Spinalis muscle • Multifidus muscle • Intertransversarii muscle • Psoas major
  • 9. Sacrum • The sacrum is inferior to the lumbar vertebrae. • Structures present anteriorly • Ala • Pelvic sacral foramina • Body • apex
  • 10. • Lateral aspect of sacrum • A. articulation surface • B. Sup. articular process • C. Median sacral crest • D. Sacral horn • E. Sacral canal
  • 11. Coccyx Bone. • The coccyx (also known as the tailbone) is the terminal part of the vertebral column. It is comprised of four vertebrae, which fuse to produce a triangular shape. • Joints • The coccyx articulates with the sacrum at a fibro cartilaginous joint called the sacrococcygeal symphysis.