Coccyx Flashcards
What is the number of coccygeal somites
Ten
What is the typical number of segments that untie to form the adult coccyx
4 segments
When is ossification of coccyx completed
about age 30
What is the direction of fusion of coccygeal segments
form caudal to cranial
The last segment to fuse together are Co1 and Co2
What is the direction of the coccygeal curve
posterior kyphotic
What is the major motion and range of motion for coccyx
flexion - extension 5-20 degrees
How many coccygeal nerves are present in the fetus
Typically 5 pairs of coccygeal nerves are present
What forms the coccygeal nerve plexus
S4
S5
Co1
What is the ganglion impar
A midline sympathetic ganglion
What is the coccygeal glommus or coccygeal body
An enlarged encapsulated arteriovenous anastomosis located near the last segment of coccyx
