External Features Of Spinal Cord

Question 1

Where does the spinal cord begin?

Answer 1

Opposite upper border of Atlas vertebra

Question 2

The spinal cord is the continuation of what?

Answer 2

Medulla oblongata

Question 3

Where does the spinal cord end in adults

Answer 3

Opposite disc between L1 and 2

Question 4

Where does spinal cord end at birth?

Answer 4

Opposite L3

Question 5

The cervical enlargement gives origin to?

Answer 5

Brachial plexus

Question 6

Lumbar enlargement gives origin to?

Answer 6

Lumbar and sacral plexuses

Question 7

Anterior root contains

Answer 7

1. Motor fibers
2. +/- Autonomic fibers

Question 8

Where are Motor fibers from?

Answer 8

Anterior horn

Question 9

What type of neurons are contained in the posterior root?

Answer 9

Pseudounipolar

Question 10

The posterior root is purely?

Answer 10

Sensory

Question 11

The dendrites of neurons in the posterior root passes?

Answer 11

Peripherally

Question 12

The axons of neurons in the posterior root enter the cord at?

Answer 12

The posterolateral sulcus

Question 13

All anterior rami form plexuses except?

Answer 13

The 12 thoracic

Question 14

What only 14 anterior rami send white rami communicants to sympathetic ganglia?

Answer 14

12 thoracic and upper 2 lumbar

Question 15

All 31 anterior rami receive grey rami communicants from?

Answer 15

Sympathetic ganglia

Question 16

What’s does posterior ramus supply?

Answer 16

Muscles and skin of back

Question 17

In cervical region C6 segment is opposite?

Answer 17

C5 vertebra

Question 18

In upper 6 thoracic segments T6 is opposite?

Answer 18

T4 vertebra

Question 19

In the lower 6 thoracic segments T12 segment is opposite?

Answer 19

T9 vertebra

Question 20

In the lumbar segments L5 segment is opposite?

Answer 20

L1 vertebra?

Question 21

All scrap & coccygeal segments are opposite?

Answer 21

L1 vertebra

Question 22

Direction of C1&2 roots?

Answer 22

Horizontal

Question 23

Direction of C3-T12 are?

Answer 23

Oblique

Question 24

Direction of L1-Co roots is?

Answer 24

Vertical

Question 25

How do C1-7 exit vertebral canal?

Answer 25

Pass above corresponding vertebrae

Question 26

How does C4 spinal nerve exit the vertebral canal

Answer 26

Above C4 vertebra

Question 27

How does the C8 nerve exit the vertebral canal?

Answer 27

Passes below C7 vertebra

Question 28

How do T1-L5 nerves exit the vertebral canal?

Answer 28

Below corresponding vertebra

Question 29

How does the T5 nerve exit the vertebral canal?

Answer 29

Below T5 vertebra

Question 30

C2-C5 nerves pass via what foramina?

Answer 30

Intervertebral foramina

Question 31

The L5 nerve exits via which foramina?

Answer 31

Intervertebral foramina

Question 32

S1-4 nerves pass via which foramina?

Answer 32

Anterior and posterior sacral foramina

Question 33

S3 nerve passes via which foramina?

Answer 33

The anterior and posterior sacral foramina

Question 34

S5 and Co pass via?

Answer 34

They sacral hiatus

Question 35

What is cauda equina?

Answer 35

Collection of spinal nerves that surround the film terminale below L2

Question 36

Nerves most liable to compression?

Answer 36

4th and 5th lumbar

Question 37

Largest spinal nerve?

Answer 37

1st sacral

Question 38

Epidural space is between?

Answer 38

Dura and vertebral column

Question 39

Epidural space contains?

Answer 39

Fat, small arteries, venous plexus & lymphatics

Question 40

Subdural space is between?

Answer 40

Dura and arachnoid mater

Question 41

Subdural space contains?

Answer 41

A thin film of fluid

Question 42

Subarachnoid space is between?

Answer 42

Arachnoid and pia mater

Question 43

Subarachnoid space contains?

Answer 43

CSF and 3 ligaments supporting the spinal cord

Question 44

The 3 ligaments supporting the spina cord are?

Answer 44

1. Filum terminale
2. Ligaments denticulatum
3. Subarachnoid septum

Question 45

Subarachnoid septum extends from?

Answer 45

Posterior median septum to the arachnoid mater