Quiz #4

Question 1

What is the origin of the Levator Scapulae?

Answer 1

Posterior tubercles of transverse process of C1 C4

Question 2

What is the insertion of the Levator Scapulae?

Answer 2

Superior part of vertebral border of scapula

Question 3

What is the action of the Levator Scapulae?

Answer 3

Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

Question 4

What is the origin of the rhomboid minor?

Answer 4

Inferior portion of nuchal ligament and spinous processes of C7-T1

Question 5

What is the insertion of the rhomboid minor?

Answer 5

Vertebral border of the scapula near or at the level of the spine

Question 6

What is the action of the rhomboid minor?

Answer 6

Adducts scapula and rotates it to depress glenoid cavity

Question 7

What is the origin of the rhomboid major?

Answer 7

Spinous process of T2-T5

Question 8

What is the insertion of the rhomboid major?

Answer 8

Inferior aspect of the vertebral border of the scapula to the inferior angle of the scapula

Question 9

What is the action of the rhomboid major?

Answer 9

Adducts scapula and rotates it to depress glenoid activity

Question 10

What three muscles make up the erector spinae?

Answer 10

1. iliocostalis
2. longissimus
3. spinalis

Question 11

What is the origin of the quadratus lumborum?

Answer 11

iliac crest and iliolumbar ligament

Question 12

What is the insertion of the quadratus lumborum?

Answer 12

Transverse processes of the lumbar vertebrae and the twelfth rib

Question 13

What is the action of the quadratus lumborum?

Answer 13

Contraction of one side flexes the vertebral column laterally. Contraction of both sides extends the vertebral column.

Question 14

What is the general shape of the spinal cord in cross-section?

Answer 14

Oval (AP compression)

Question 15

What depressions lie on the anterior and posterior surface of the spinal cord? (2)

Answer 15

Posterior Median Sulcus
Anterior Median Sulcus

Question 16

Where does the spinal cord begin and end in an adult?

Answer 16

The spinal cord extends from the foramen magnum to the first lumbar vertebra (L1)

Question 17

List the regions of the spinal cord (5)

Answer 17

Cervical Region
Thoracic Region
Lumbar Region
Sacral Region
Coccygeal Region

Question 18

From superficial to deep list the spaces and structures surrounding the spinal cord

Answer 18

Vertebra
Epidural Space
Dura Mater
Subdural Space
Arachnoid Mater
Subarachnoid Space
Pia Mater

Question 19

How does the dura mater within the vertebral canal different from the dura within the cranial cavity?

Answer 19

It consists of one layer rather than two

Question 20

What portion of the spinal cord is composed of dendrites and cell bodies of neurons and glial cells and unmyelinated axons?

Answer 20

Gray matter

Question 21

What portion of the spinal cord is composed of myelinated axons?

Answer 21

White matter

Question 22

Within the spinal cord where is gray matter located and how is it shaped?

Answer 22

Centrally
H-Shaped or butterfly-shaped

Question 23

Within the spinal cord what are the anterior masses of gray matter that contain the cell bodies of somatic motor neurons>

Answer 23

Anterior horns

Question 24

Within the spinal cord from T1-L2 what structures contain the cell bodies of autonomic motor neurons?

Answer 24

Lateral Horns

Question 25

Within the spinal cord what are the posterior masses of gray matter that contain the axons of sensory neurons and the cell bodies of interneurons?

Answer 25

Posterior Horns

Question 26

What horizontal bar of gray matter surrounds the central canal within the spinal cord?

Answer 26

Gray Commissure

Question 27

What fills the central canal of the spinal cord?

Answer 27

Cerebrospinal Fluid

Question 28

WIthin the regions of the spinal cord's gray matter what are the various functional groups of neuron cell bodies?

Answer 28

Nuclei

Question 29

Where does the white matter of the spinal cord lie in relation to the grau matter?

Answer 29

External

Question 30

The white matter of the spinal cord is partitioned into three regions. What are they called?

Answer 30

Posterior Funiculus Lateral Funiculus Anterior Funiculus

Question 31

ANteriorly and posteriorly what are the small attachments of a spinal nerve to the spinal cord?

Answer 31

Rootlets

Question 32

The numerous small attachments of a spinal nerve to the spinal cord converge to form what structures?

Answer 32

Ventral (Anterior) root Dorsal (Posterior) root

Question 33

The cell bodies of sensory neurons associated with the spinal cord are found in what structures?

Answer 33

Dorsal (posterior) root ganglion

Question 34

The cell bodies of motor neurons within the spinal cord are found in what structures?

Answer 34

Anterior horn

Question 35

Spinal nerves are formed by the convergence of what structures within what structure?

Answer 35

Anterior and posterior roots within the intervertebral foramen

Question 36

How many pairs of spinal nerves are there

Answer 36

31

Question 37

What are the two main branches of a spinal nerve

Answer 37

Posterior ramus Anterior ramus

Question 38

What branches of a spinal nerve are associated with the autonomic nervous system?

Answer 38

Rami communicantes (communicating rami)

Question 39

What is a specific segment of skin supplied by a single spinal nerve?

Answer 39

Dermatomes

Question 40

Collection of nerves extending from the end of the spinal cord to the end of the vertebral Hint: Resembles a horse's tail

Answer 40

Cauda Equina