external anatomy

Question 1

What is the shape of the spinal cord?

Answer 1

oval

width is greater than anterior posterior side

Question 2

What are the grooves that run longitudinally along the spinal cord?

Answer 2

Ventral median fissure
dorsal median fissure (shallower than ventral median fissure)
ventral lateral sulci
dorsal lateral sulci

Question 3

What arises from ventral lateral and dorsal lateral sulci?

Answer 3

Ventral lateral sulci -anterior spinal nerve roots

dorsal lateral sulci - posterior spinal nerve roots

Question 4

How is the spinal cord divided?

Answer 4

into left and right hemispheres by a artificial line that connects the anterior median fissure and the posterior median sulcus

Question 5

Where does the spinal cord lie in the vertebral canal?

Answer 5

in the superior 2/3

it is continuous with the brainstem superiorly threw the foramen magnum

Question 6

where does the spinal cord terminate in the vertebral canal?

Answer 6

L1/L2 intervebral disk in in the Conus medularis in adults

Question 7

What is the area below the conus medullaris?

Answer 7

lumbar cistern -

Question 8

What does the lumber cistern contain?

Answer 8

cauda equina
CSF
internal filum terminale

Question 9

What is the cervical enlargement?

Answer 9

parts of the spinal cord that is enlarged from C4-T1

anterior rami of C4-T1 which form the brachial plexus

Question 10

What is the lumbar sacral enlargement?

Answer 10

region of spinal cord from T11- S1 spinal cord level

this forms lumbar plexus and sacral plexus

Question 11

What is immediately below the lumbar sacral enlargement?

Answer 11

conus medullaris