Back Neurology

Question 1

Length of Spinal Cord

Answer 1

2/3 of the vertebral column from the medulla oblongata to the conus medullaris.

Question 2

Layers of Meninges

Answer 2

Dura mater
Arachnoid mater
Pia mater

Question 3

Epidural space

Answer 3

Outside of dura. Occupied by internal vertebral venoud plexus and epidural fat.

Question 4

Spinal dural sac

Answer 4

Tube-shaped sheath surrounding the spinal cord and lining the vertebral canal.

Question 5

Dural root sheath

Answer 5

Extension of the dura mater that surrounds the anterior and posterior roots.

Question 6

Subarachnoid space

Answer 6

Space between pia mater and arachnoid mater and filled with CSF.

Question 7

Arachnoid trabeculae

Answer 7

Strands of CT that span the subarachnoid space and join arachnoid mater to the pia mater.

Question 8

Lumbar cistern

Answer 8

Enlargement of the subarachnoid space beneath te conus medullaris.

Question 9

Denticulate ligament

Answer 9

Lateral extension of the pia mater. Suspends the spinal cord in the dural sac.

Question 10

Cervical enlargement

Answer 10

Swelling of SC from C4-T1 that corresponds with the brachial plexus and the upper extremity.

Question 11

Lumbosacral enlargement

Answer 11

Swelling of SC from T11-S1 that correspond to lumbar and sacral plexi and lower extremity.

Question 12

Spinal nerves

Answer 12

Sensory and motor.

8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal.

Question 13

Anterior rami of the cervical spine contains:

3

Answer 13

Cervical plexus.
Brachial plexus.
Recurrent meningeal branches.

Question 14

Posterior rami of the cervical spine contains:

4

Answer 14

Suboccipital N.
Great Occipital N.
Least Occipital N.
C4-8 medial and lateral branches.
–> medial: muscular, articular and cutaneous branches.
–> lateral:muscular and cutaneous branches.

Question 15

Anterior rami of the thoracic spine contains:

4

Answer 15

Atypical Intercostal N.
Typical Intercostal N.
Subcostal N.
Recurrent meningeal branches.

Question 16

Posterior rami of the thoracic spine contains:

2

Answer 16

Medial and lateral branches.

• -> medial: muscular, articular and cutaneous.
• -> lateral: muscular and cutaneous.

Question 17

Anterior rami of the lumbar spine contains:

3

Answer 17

Lumbar plexus
Lumbosacral trunk
Recurrent meningeal branches.

Question 18

Posterior rami of the lumbar spine contains:

2

Answer 18

Medial and lateral branches.

• -> medial: muscular, articular and cutaneous.
• -> lateral: muscular, cutaneous, superior cluneal N.

Question 19

Anterior rami of the sacrum contains:

3

Answer 19

Sacral plexus
Coccygeal plexus
Recurrent meningeal branches

Question 20

Posterior rami of the sacrum contains

Answer 20

Medial and lateral branches.

• -> medial: nothing else listed.
• -> lateral: middle cluneal N.

Question 21

Conus medullaris

Answer 21

Cone-shaped terminal end of SC, beginning to taper off at T12 and ending at L2.

Question 22

Cauda equina

Answer 22

Bundle of anterior and posterior roots from lumbosacral enlargement and meduallary cone.