Flashcards in Spinal Cord Deck (25)
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1
How is a bundle of neurones termed differently in the CNS vs PNS
Tract, nerve
2
How is a body of axons termed differently in CNS v PNS
Nucleus, Ganglion
3
A branch of an axon is a
collateral
4
Briefly outline neural tube formation
1. Neural plate epithelium
2. Epithelium is folded to form a groove
3. Neural crest + Neural tube cells
5
What occurs when neural tube doesn't close?
Anencephaly and spinal bifida
6
Which vitamin helps with neural tube formation?
Folic acid
7
What are the different meninges?
1. Dura
2. Arachnoid
3. Pia
8
What does the subarachnoid space contain?
CSF - allows CNS to float
9
What connects pia and arachnoid layers?
Denticulate ligament
10
What are the segments of the spinal cord named after?
The spinal nerve to which they give rise
11
Name segments and lengths of spinal cord from top to bottom
1. Cervical 1-8
2. Thoracic 1-12
3. Lumbar 1-5
4. Sacral 1-6
5. Coccygeal
12
At which segment and number does the spinal cord end and how does this differ from at birth
L1 and L3 at birth
13
Cervical enlargement extends from
C5 - T1
14
Cervical enlargement is due to
large nerves which supply upper limbs
15
Lumbar enlargement extends from
L1-S2
16
What extends beyond the end of the spinal cord?
Nerve roots
17
Tapered lower end of spinal cord
Conus medullaris
18
After the spinal cord tapers out, the spinal nerves branch out diagonally forming the
Cauda equina
19
Cauda equina consists of
L2-L5 nerve pairs
20
The rostral end of the neural tube expands to form
the brain
21
2 outgrowths of of forebrain vesicles
1. Telencephalon
2. Diencephalon
22
Choroid plexus
Plexus of cells that produce CSF - largely in lateral ventricles
23
Brainstem function
Midbrain: vision, brain, hearing, eye + body movement
Medulla: passive body needs
Pons: motor control + sensory analysis
24
Diencephalon includes
Hypothalamus + thalamus
25
