Sacrum And Coccyx

Question 1

Structures sacrum

Answer 1

L5
Entire sacrum
PS
Bilateral SI joints

Question 2

CR and CP sacrum

Answer 2

CR: 15 Cephalad supine/15 caudal prone
CP: midline at Lv S3

Question 3

No rotation Sacrum

Answer 3

Median sacral crest and coccyx aligned with PS
Ischial spines equally aligned with pelvic brim

Question 4

Good BTP/CR sacrum

Answer 4

S1-S5 segments not foreshortened
Sacral foramina equally spaced
No SI of PS on sacrum

Question 5

Structure coccyx

Answer 5

S5, coccyx, PS and pelvic brim

Question 6

CR and CP coccyx

Answer 6

Cr: 10 Caudad
CP: midline at lv of mid coccyx

Question 7

No rotation coccyx

Answer 7

Coccyx aligned with PS
Equidistant from lateral walls of pelvic inlet

Question 8

Good BTP/CR

Answer 8

Coccyx seen without foreshortening and without SI from PS

Question 9

Structures lat

Answer 9

Sacrum: L5-coccyx
Sacrum: entire coccyx

Question 10

CR and CP lat

Answer 10

Cr: perp
Cp: sacrum: S3
Coccyx: 2nd coccygeal segment

Question 11

No rotation lat

Answer 11

Main: greater sciatic notch SI ant/post
Femoral heads are SI ant/post

Question 12

Good BTP/ tilt lat

Answer 12

Main: open L5-S1 joint, greater sciatic notches SI sup/inf, pelvic Ala nearly SI