Development and overview of the CNS Flashcards
_______ marks the beginning of the formation of the CNS and is the process by which the neural plate forms into a neural tube.
neurulation
A _______ is an area of skin supplied by a single spinal nerve or spinal segment.
dermatome
Do dermatomes overlap?
yes!
A ________ is an area of muscle supplied by a single spinal nerve or spinal segment.
myotome
The afferent input to the brain includes both _____ and _______.
somatic; visceral
The efferent output from the brain includes both _____ motor and _____ motor.
somatic; visceral
What are the two hemispheres of the brain connected by?
commissural fibres (corpus callosum)
White matter = ______ _____ grey matter = _____ ______.
fibre tracts; cell bodies
What are the 3 types of fibres making up the connectome?
- Projection
- Association
- Commissural
The _______ fibres connect to and from the cortex.
projection
The _______ and ______ fibres connect from one area of the cortex to another.
association and commissural
What are the two different layers of dura matter?
- periosteal
2. meningeal
What are the 3 spaces between the skill and cerebral cortex?
- Epidural
- Subdural
- Subarachnoid
What artery is located in the epidural space?
middle meningeal
When does a subdural hematoma occur?
When violent shaking of the head severs the veins connecting to the dural sinuses (shaken baby syndrome)
When does a subarachnoid hematoma occur?
Hemorrhagic stroke or bleeding of an arterial aneurysm
What are the true vs. potential spaces?
- True = subarachnoid space
- Potential = epidural and subdural space
Name the structures in the brainstem, from superior to inferior.
- Midbrain
- Pons
- Medulla
Where do first order neurons cross?
medulla
Wheredo second order neurons cross?
spinal cord
Where do third order neurons cross?
thalamus and cortex
What do first order neurons detect?
discriminative touch, vibration, pressure
What do second order neurones detect?
pain and temp
Where do fibre tracks cross?
in the midline
