My Guess on What To Know

Question 1

Spinal Cord

Answer 1

Bidirectional transmission link between the body and the brain. Can generate its own sensorimotor reflex, which saves time

Question 2

Spinal Cord Course

Answer 2

Caudal continuation of the medulla oblongata. Runs through foramen magnum, caudally through vertebral foramen of the vertebral column

Question 3

Conus Medullaris

Answer 3

The point at which the spinal cord tapers to a point. Located at level of L1 or L2.

Question 4

Neonate and Adult Spinal Cord Length

Answer 4

At birth, the spinal cord and vertebral column are the same length. Growth of the vertebral column is faster than the spinal cord.

Question 5

Cauda Equina

Answer 5

Series of nerve rootlets at the end of the spinal cord that taper to a point called this

Question 6

Spinal Cord Composition

Answer 6

An oval shaped mass of white matter that surrounds a butterfly or H shaped mass of gray matter

Question 7

Ventral Median Fissure

Answer 7

Ventrally divides the spinal cord in half

Question 8

Dorsal Median Septum

Answer 8

Posteriorly divides the spinal cord into left and right halves

Question 9

Gray Matter of Spinal Cord

Answer 9

Composed of spinal nerve cells that surround the central canal

Question 10

Horns of Gray Matter

Answer 10

Has two sets of horns, 2 dorsal horns and 2 ventral horns

Question 11

Dorsal Horns

Answer 11

Thinner horns. Composed of sensory nuclei, which we call dorsal horn cells. Receive sensory information

Question 12

Dorsal Horn Fibers

Answer 12

Synapse with dorsal horn cells. They compose the the sensory component of each spinal nerve

Question 13

Ventral Horns

Answer 13

Composed of motor nuclei, which we call ventral horn cells. Motor in function.

Question 14

Ventral Horn Fibers

Answer 14

Synapse with the ventral horn cells to send motor information out via the spinal nerves

Question 15

Bar of the H

Answer 15

Cells that are part of the reticular formation

Question 16

White Matter of Spinal Cord

Answer 16

Composed of a series of ascending and descending tracts, called funiculi.

Question 17

Funiculi

Answer 17

Series of ascending and descending tracts. The transmission lines of the spinal cord. Ascending are sensory, descending are motor. Divided by anterior, posterior, and lateral

Question 18

Ventral Spinothalamic Tract

Answer 18

Decussating ascending tract that runs from spinal cord to thalamus. Function is light touch????

Question 19

Spinocerebellar Tract

Answer 19

Lateral Ascending tract. Ipsilateral and runs from spinal cord to cerebellum. Conveys information from tendons and muscles in the leg and trunk.

Question 20

Lateral Spinothalamic Tract

Answer 20

Decussating Ascending tract. Runs from spinal cord to thalamus. Conveys information about pain and temperature

Question 21

Fasiculus Gracilis

Answer 21

Dorsal ascending tract. Ipsilateral and goes to medulla oblongata. Conveys information about joint movement, vibration, and passive movement.

Question 22

Fasiculus Cuneatus

Answer 22

Dorsal Ascending Tract. Ipsilateral and runs to medulla oblongata. Relays proprioceptive information

Question 23

Vestibulospinal Tracts

Answer 23

Ventral descending tract. Runs from brain stem to spinal cord. Regulates balance reflex mechanism. Plays a role in posture and muscle tone

Question 24

Direct Pyramidal Tract/ Ventral Corticospinal Trat

Answer 24

Ventral Descending tract. Runs from motor cortex. Relays voluntary impulses for movement in the mid thoracic region of the body

Question 25

Reticulospinal Tract

Answer 25

Ventral descending tract. Starts at reticular formation of medulla oblongata and midbrain, goes to spinal cord. Regulates skeletal muscle tone

Question 26

Tectospinal Tract

Answer 26

Ventral Descending tract. Decussating. Runs from tectum (more specifically the superior colliculi) and goes to spinal cord. Plays a role in audio-visual reflex.

Question 27

Lateral Pyramidal Tract/ Lateral Corticospinal Tract

Answer 27

Lateral Descending tract. Decussating. Rises from motor cortex through medulla into spinal cord. Responsible for initiating of motor movements

Question 28

Intersegmental Fibers

Answer 28

Information jumps from one segment to the next, it saves time. Allows for sensory motor reflex within the spinal cord, so it doesn’t have to travel to the brain.