B5 CNS: Basal Ganglia Flashcards
What are ganglia?
Collections of cell bodies
What are the basal ganglia?
Putamen Globus Pallidus Substantia Nigra Subthalamic Nucleus Caudate Nucleus
What is the ‘striatum’ made up of?
Putamen
Globus Pallidus
What is the difference between cranial and spinal nerves?
Cranial - exist from cranium
Spinal - exist from spinal column
Is a vagus nerve a cranial or spinal nerve?
Cranial
What is the point of a plexus?
Efficient redistribution of nerves
Give some examples of plexuses
Phrenic nerve (C3-5) Brachial plexus Cervical plexus Lumbar plexus Sacral plexus
Can a plexus exist before spinal nerves have been formed?
No- they are formed via branching of spinal nerves
What are branches of a spinal nerve called?
Rami
How long is the foramen magnum?
42-45cm
What are enlargements?
Increased size of spinal cord, particularly ventral horn
What does the filum terminale attach to?
S2 Vertebra
Where in the spinal cord would you find the conus medularis?
L1/L2
What is the posterior folliculus?
Dorsal column
What is another name for a cordotomy?
Lesion
What would you find in the grey matter?
Cortex
Nuclei
Which cranial nerves come off of the cerebellum?
1 & 2
Which cranial nerve is the only one to run posterior to the brainstem before coming to the front?
CN IV
Which structures do the cranial nerves come off of?
Cerebellum
Midbrain
Pons
Medulla
Where does cranial nerve 7 come off of?
Pons
Which cranial nerves come off of the midbrain?
3 & 4
Which cranial nerves come off of the pons?
5
6
7
8
Which cranial nerves come off of the medulla
9
10
11
12
What are peduncles?
Communication tracts between the brainstem and cerebellum
From the cerebellum, what do the superior peduncles connect to?
Midbrain
What do the middle peduncles connect to?
Cerebellum ->Pons
From the cerebellum, what do the inferior peduncles connect to?
Medulla
