Lecture: Spinal Cord and Spinal Nerves Flashcards Preview

C&M Term 2 > Lecture: Spinal Cord and Spinal Nerves > Flashcards

Flashcards in Lecture: Spinal Cord and Spinal Nerves Deck (19):
1

Briefly describe the spinal cord

The continuation of the CNS within the vertebral column from the foramen magnum to the L1/L2 intervertebral disc

2

How many vertebrae and spinal cord segments are there?

30 vertebrae
31 spinal cord segements (C1-C8)

3

C8 spinal nerve emerges above or below its corresponding vertebrae?

Below CVII

4

What is the conus medullaris?

Cone shaped tapered end of the spinal cord at L1/L2

5

What is the Cauda Equina?

Bundle of dorsal and ventral roots emerging from the conus medullaris, for the nerves L1 - Co1

6

What is the filum terminale?

continuation of the pia mater post conus medullaris, attaches apex of spinal cord to the coccyx
provides tension and stability

7

what separates the dura from the surrounding bone of the vertebrae?

fat-filled epidural space

8

describe the denticulate ligaments

flat, stabilising ligaments made of pia mater
reach out and attach to arachnoid mater

9

Where does the spinal cord terminate as a fetus/at birth/in adulthood?

Fetus - end of vertebral column
Birth - L3
Adulthood - between L1/L2

10

Describe the vasculature of the spinal cord

unpaired anterior spinal artery
paired posterior spinal arteries
arise from vertebral arteries
supported by radicular and segmental medullary arteries

11

What type of nerve emerge from the Dorsal Grey Horn

Somatic and Visceral Sensory

12

What type of nerve emerge from the Ventral Grey Horn

Somatic Motor
Visceral Motor

13

levels of the lateral grey horn?

T1-L2
S2-S4

14

Describe the spinal cord as we ascend it

White matter increases as ascended
Ventral grey horn enlarged where motor fibres to limbs arise

15

What differs above the T6 vertebrae?

there are 2 Dorsal Columns on each side of the midline
Gracile Fascicle medially
Cuneate Fascicle laterally

16

brief overview of the Spinothalamic Tract (STT)

ventral white column
Contralateral
Pain, light touch, temperature

17

brief overview of Dorsal Column

Dorsal white column
Ipsilateral
Joint position sense and vibration sense

18

brief overview of lateral corticospinal tract

lateral white column
ipsilateral
voluntary movement

19

brief overview of ventral corticospinal tract

small blob on ventral white column
contralateral
voluntary movement