Line 2:5·'Gross Anatomy' should use sentence-style capitalization.
Headings Valid
warning
Expected headings
H1
Summary
H1
Gross anatomy
H2
Location
H2
Origin
H2
Course
H2
Branches
H2
Supply
H2
Relations
H1
Variant anatomy
H1
Radiographic features
H2
Plain radiograph
H2
Ultrasound
H2
CT
H2
MRI
H2
Nuclear medicine
H1
Development
H1
Clinical importance
H1
Related pathology
H1
History and etymology
H1
See also
"Gross Anatomy"
Line 2:1·"Gross Anatomy" is not a recognised heading for this article type.
"Origin"
Line 3:1·"Origin" is under the wrong parent heading (found under "Gross Anatomy").
"Course"
Line 6:1·"Course" is under the wrong parent heading (found under "Gross Anatomy").
Oxford Comma
suggestion
"Rarely, it has also been seen to arise from the C3, C4 or C5 nerve roots, supraclavicular nerve, spinal accessory nerve, nerve to sternohyoid muscle or hypoglossal nerve."