Neurology System Flashcards
What are the three components of the brainstem?
Midbrain
Pons
Medulla
What cranial fossa is the brainstem contained in?
Posterior
What two vesicles of the neural tube form the brainstem?
Midbrain
Hindbrain
What two ventricles are contained within the brainstem?
Cerebral aqueduct
Fourth ventricle
What groove separates the pons and the medulla?
Pontomedullary junction
What four nerves emerge from the pontomedullary junction?
CN IX
CN X
CN XI
CN XII
What three structures are seen on the ventral aspect of the medulla?
Olives
Pyramids
Cranial Nerves
What cranial nerve has the longest intracranial course?
CN X
Where does the trigeminal nerve originate from?
The lateral surface of the pons
What lies superior to the midbrain?
Diencephalon
What lies inferior to the midbrain?
Pons
What three structures make up the diecenphalon?
Epithalamus
Hypothalamus
Thalamus
What lies superior to the diencephalon?
Cerebrum
What lies inferior to the diecephalon?
Brainstem
What is another name for the epithalamus?
Pineal gland
What midline structure connects the two cerebellar hemispheres?
Vermis
What are the three lobes of the cerebellum?
Anterior lobe
Posterior lobe
Flocculonodular lobe
What ventricle lies anterior to the cerebellum?
Fourth ventricle
What foramen does the cerebellum sit above?
Foramen magnum
What part of the cerebellum sits above the foramen magnum?
Cerebellar tonsils
What is coning herniation?
When the cerebellar tonsils herniate through the foramen magnum
What fissure separates the two cerebral hemispheres?
Median longitudinal fissure
What type of nerve fibres make up the corpus callosum?
Commissural
What do the anterior aspect of the cerebral hemispheres sit on top of?
Anterior cranial fossa
Middle cranial fossa
What do the posterior aspect of the cerebral hemispheres sit on top of?
Tentorium cerebelli
What is tentorium cerebelli?
A fold of dura matter
In which lobe is the primary motor cortex located?
Frontal
In which lobe is the primary sensory cortex located?
Parietal
In which lobe is Wernicke’s area located?
Parietal
In which lobe is the primary visual cortex located?
Occipital
In which lobe is the primary auditory cortex located?
Temporal
In which lobe is Broca’s areas located?
Frontal
At what vertebral level does the spinal cord terminate in adults?
L2
At what vertebral level does the spinal cord terminate in newborns?
L3
At what vertebral level does the dura mater terminate?
S3
At what vertebral level does the arachnoid mater terminate?
S2
What is the cauda equina?
The space between the end of the spinal cord and the termination of the dura and the arachnoid mater
What happens to the pia mater inferior to the spinal cord?
It extends to form denticulate ligaments, which anchor the spinal cord to the dura mater
At what vertebral level do we perform a lumbar puncture on an adult?
L3-L4
How many spinal nerves are there?
31
What two arteries supply blood to the brain?
Vertebral arteries
Internal carotid arteries
Where do the vertebral and internal carotid arteries meet?
Circle of Willis
What are the left and right vertebral arteries branches of?
The common carotid artery
At what vertebral level do the left and right internal carotid arteries arise?
C4
What do the two vertebral arteries form?
Basilar artery
What is the basilar artery close to?
Pons
What two arteries does the posterior communicating artery connect?
The internal carotid artery to the posterior cerebral artery
What two arteries does the anterior communicating artery connect?
The two anterior cerebral arteries
In what groove does the anterior cerebral artery run?
Medial longitudinal fissure