Which craniovertebral compression is more frequent in PD patients than in controls?

Which craniovertebral compression is more frequent in PD patients than in controls?

• A. Bilateral occipitocervical compression
• B. Bilateral occipitoatlantal compression
• C. Atlantoaxial compression
• D. Occipital condyle compression

Answer: (B)

In Parkinson disease, abnormal neck postures and axial rigidity often lead to chronic, symmetrical loading at the craniovertebral junction. This pattern predisposes to compression where the skull meets the first cervical vertebra—the occipitoatlantal joint. When dystonic postures such as retrocollis are present, the occipitoatlantal articulation can become narrowed on both sides, producing bilateral occipitoatlantal compression. This site is more commonly affected in PD than the other craniovertebral locations listed because it directly bears the weight and alignment forces of the head in the common PD postures. Atlantoaxial compression is more typical of inflammatory or congenital conditions, while occipital condyle compression is less characteristically tied to PD and tends to be more localized rather than a bilateral pattern.

In Parkinson disease, abnormal neck postures and axial rigidity often lead to chronic, symmetrical loading at the craniovertebral junction. This pattern predisposes to compression where the skull meets the first cervical vertebra—the occipitoatlantal joint. When dystonic postures such as retrocollis are present, the occipitoatlantal articulation can become narrowed on both sides, producing bilateral occipitoatlantal compression. This site is more commonly affected in PD than the other craniovertebral locations listed because it directly bears the weight and alignment forces of the head in the common PD postures. Atlantoaxial compression is more typical of inflammatory or congenital conditions, while occipital condyle compression is less characteristically tied to PD and tends to be more localized rather than a bilateral pattern.