Disruption of one column is generally stable. Disruption of two or more is unstable.
Make sure that the C7-T1 junction is adequately visualized<unk>  Spine Radiographic series contains 3 views
Anteroposterior
Lateral
Open mouth odontoid view
Look for alignment of four parallel vertical columns that follow a slightly lordotic curve without any step offs
Anterior Vertebral Line: anterior to the vertebral body alternating with intervertebral disks surrouded by anulus fibrosus and anterior longitudinal ligament
Posterior Vertebral Line: posterior to the vertebral body alternating with intervertebral disks surrouded by anulus fibrosus and posterior longitudinal ligament
Spinolaminar Line- anterior edge of the spinous process
Posterior Spinous Line-spinous process, nuchal ligament, interpsinous and supraspinous ligaments, and ligamentum flavum<unk>  Spine Radiographic series contains 3 views
Anteroposterior
Lateral
Open mouth odontoid view
Anteroposterior
Lateral
Open mouth odontoid view
Anterior Vertebral Line: anterior to the vertebral body alternating with intervertebral disks surrouded by anulus fibrosus and anterior longitudinal ligament
Posterior Vertebral Line: posterior to the vertebral body alternating with intervertebral disks surrouded by anulus fibrosus and posterior longitudinal ligament
Spinolaminar Line- anterior edge of the spinous process
Posterior Spinous Line-spinous process, nuchal ligament, interpsinous and supraspinous ligaments, and ligamentum flavum
In patients less than 7 years old, most common mechanism for C-Spine injury was from motor vehicle crashes with injuries in the axial (occiput-C2) region
In patients 8-15 years old, sports and motor vehicle crashes account for the most common mechanisms with injuries in the sub axial C3-C7) region. Most pediatric fractures occur higher than C3 (from proportionally larger head)
Pseudosubluxation of C2-C3 is common (~40%) in children <8yr
To distinguish from true dislocation or fracture:
Draw line from cortex of post arch of C1 to cortex of posterior arch of C3 (Swischuk line)
This line should pass through or be <2mm ant to posterior arch of C2
To distinguish from true dislocation or fracture:
Draw line from cortex of post arch of C1 to cortex of posterior arch of C3 (Swischuk line)
This line should pass through or be <2mm ant to posterior arch of C2
Draw line from cortex of post arch of C1 to cortex of posterior arch of C3 (Swischuk line)
This line should pass through or be <2mm ant to posterior arch of C2
Cervical spine x-ray interpretation
Chest x-ray interpretation
Canadian cervical spine rule
X-ray interpretation 
Neck diagnoses
Tongue diagnoses
NEXUS cervical spine rule
Predicting the difficult airway