Line 8:1·Never put spaces at either end of headings.
Acronyms
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"Where there is even minor displacement of the capitellum, look for evidence of an elbow effusion, or minor cortical irregularity on the AP and lateral film."
Line 6:147·'AP' has no definition. Spell it out if it's unfamiliar to the audience.
Headings Valid
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Expected headings
H1
Usage
H1
Measurement
H1
Interpretation
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History and etymology
H1
See also
"Video tutorial "
Line 8:1·"Video tutorial " is not a recognised heading for this article type.