Anatomy of the Sacrum & Coccyx [+ other relevant structures]

The video tutorial covers the anatomy of the sacrum and coccyx, including the number and fusion of sacral and coccygeal vertebrae. It explains the curvature of the sacrum and coccyx, highlighting differences between males and females. The sacrococcygeal joint is discussed, along with its limited movement. The tutorial also covers anatomical structures such as the sacral base, articular facets, and sacral ala, and explains the pathways of nerve roots through the sacral canal and foramina.

How many sacral vertebrae are typically fused in an adult?

• Six

• Five

• Four

• Three

At what age do the sacral vertebrae usually complete their fusion?

• By age 20

• By age 25

• By age 35

• By age 30

What type of curvature do the sacrum and coccyx exhibit?

• Lordosis

• Kyphosis

• Scoliosis

• No curvature

How many coccygeal vertebrae are typically fused?

• Two to four

• Three to five

• Four to six

• Five to seven

What type of joint is the sacrococcygeal joint?

• Synovial joint

• Ball and socket

• Synthesis

• Diarthrosis

Which nerve roots pass through the sacral hiatus?

• All sacral nerve roots

• S5 and coccygeal

• S3 and S4

• S1 and S2

Through which foramina do the anterior rami of sacral nerves exit?

• Anterior sacral foramina

• Sacral hiatus

• Vertebral canal

• Posterior sacral foramina