For infratentorial approach, how should the neck be aligned and patient positioned?

• A. Neck straight, patient on either side, not on back
• B. Neck flexed, patient on back
• C. Neck rotated with patient upright
• D. Neck hyperextended with patient prone

Answer: (A)

For infratentorial (posterior fossa) surgery, the goal is to expose the cerebellum and brainstem while keeping the airway secure and protecting the cervical vessels. Keeping the neck in a neutral, straight position avoids bending or twisting that could kink the vertebral arteries or impede venous drainage. Placing the patient on their side (lateral decubitus) rather than lying on the back provides a favorable corridor to the posterior fossa and helps prevent airway or venous complications by avoiding forward pressure on the neck and airway structures.

In contrast, flexing the neck on the back can crowd the airway and impede venous return; rotating the neck or positioning the patient upright changes the orientation of the vertebral arteries and the surgical access in ways that are not ideal for most infratentorial approaches; hyperextending the neck in prone can strain the cervical spine and also affect airway management.