Intro to Vertebra

Question 1

Parts of the spine (regions) + #

Answer 1

5 regions
Cervical-7
Thoracic- 12
Lumbar-5
Sacral- 5 fused
Coccyx- 4 fused

Question 2

3 Curvatures of the spine (what side are they concave from)

Answer 2

Kyphosis- anteriorly concave
Lordosis- Posteriorly concave
Scoliosis- lateral curvature

Question 3

Primary + Secondary areas of spine and when do they develop

Answer 3

Primary- Thoracic + sacral kyphosis (development)

Secondary- Cervical lordosis (3-4m) Lumbar lordosis (10-18m)

Question 4

General features of typical vertebra body

Answer 4

Epiphyseal rings on border compact
Centrum bone on inside is spongy
Posterior surface has foramen for basivertebral vein

Question 5

General features of vertebral arch

Answer 5

has 2 pedical (R+L) and 2 laminae (R+L)

Question 6

Pedicle features

Answer 6

Short, cylindrical, posterior bony projections

-in an articulated vertebral column, creats intervertebral foramina

Question 7

Vertebral foramen contents

Answer 7

spinal cord, cauda equina (below l2), meniges and vessels

Question 8

Verterbral processes (how many and types)

Answer 8

7
Spinous process- pos or pos inf. bony projections

Transverse process- 2 pos. lat. projections located at junction bw pedicles and laminae

Articular process- 4, 2 sup. 2 inf. (creates z joint)

Question 9

Atrial blood supply of vertebra (segments)

Answer 9

C- vertebral arteries (1)
T- posterior intercostal arteries (1)
L- Lumbar artieries (5 pairs)
S- lateral sacral artery (1)

anterior, spinal and posterior for each part of vertebra

Question 10

Venous drainage of verebra (3)

Answer 10

Anterior external vertebral venous plexus
Internal vertebral venous plexus (for basiverterbral)
Posterior external vertebral venous plexus

Question 11

Schmorls node

Spinal stenosis

Answer 11

node- herniation of pulposis into the vertebral body

stenosis- narrowing of vertebral canal