What is the primary function of the Circle of Willis?

What is a common indication for performing a lumbar laminectomy?

During a spinal fusion, what is commonly used as an autologous graft?

Select all of the following which are known functions of the neuroglial cells. 

What type of surgery involves the removal of a brain tumor through the nasal cavity?

What is the purpose of a ventriculoperitoneal (VP) shunt?

Which structure does the spinal cord pass through in each vertebral body?

Which surgical position is often used for posterior cervical decompression?

Choose the correct kanji/hiragana of the meaning below. to go

Choose the correct kanji/katakana/hiragana of the meaning below. And then I watched TV.