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Spinal Exam 2 > Coccyx > Flashcards

Flashcards in Coccyx Deck (15):
1

What is the number of coccygeal somites

10

2

what is the typical number of segments that unite to form the adult coccyx

4 segments

3

when is ossification of the coccyx completed

about age 30

4

What is the direction of fusion of coccygeal segments

from caudal to cranial, the last segments to fuse together are Co1 and Co2

5

what is the direction of the coccygeal curve

posterior (kyphotic)

6

What is the major motion and range of motion fro coccyx

flexion-extension, 5-20 degrees

7

how many coccygeal nerves are present in the fetus

typically 5 pairs of coccygeal nerves are present

8

how many coccygeal nerves are present in the adult

typically only one pair of coccygeal nerves remeain in the adult

9

what forms the coccygeal nerve plexus

S4-5 and Co1 nerves

10

what is the ganglion impar

a midline sympathetic ganglion

11

What innervates the coccygeal glomus or coccygeal body

both sympathetic and parasympathetic fibers are identified

12

What muscles attach to the coccyx

ischiococcygeus and levator ani

13

What joint classifications are present for coccyx

cartilaginous (amphiarthrosis) symphysis and fibrous (amphiarthrosis) syndesmosis

14

What forms the posterior boundary for the first coccygeal spinal nerve intervertebral foramen

sacral cornu, coccygeal cornu, superficial posterior sacrococcygeal ligament, intercornual ligament

15

What forms the anterior boundary for the fist coccygeal spinal nerve intervertebral foramen

vertebral body S5, vertebral body Co1, deep posterior sacrococcygeal ligament, intervertebral disc