Brain Anatomy 1 Flashcards
What three structures make up the brainstem
Midbrain, medulla and pons
Embryologically, which two vesicles of the neural tube give rise to the brainstem?
Rhombocephalon and myencephalon
What cavities of the ventricular system lie within the brainstem
4th ventricle and cerebral aqueduct
Which cranial nerves can you see emerging from the pontomedullary junction?
Abducens, facial and vestibulocochlear
Which cranial nerve emerging from the pontomedullary junction has the longest intracranial course?
Abducens
What is the function of the pyramids?
Contain the motor fibres of the corticospinal and corticobulbar
What is the function of the decussation of the pyramids?
Where most of the tracts cross over (decussation)
What is the function of the olives?
Contain the inferior olivar nucleus - receives input from the motor and sensory cortices
Is the open part of the medulla superior or inferior?
Inferior
Is the closed part of the medulla superior or inferior?
Superior
What structure does the open part of the medulla open into?
4th ventricle
Through which foramen does the medulla pass to become the spinal cord?
Foramen magnum
What part of the brain lies immediately superior to the midbrain?
Diencephalon
What structure lies immediately inferior to the midbrain?
Pons
What type of fibres make up the cerebral peduncles?
Nerve fibres going from the cerebral hemispheres to the pons
What structures make up the diencephalon?
Thalamus and hypothalamus
Which parts of the brain does the diencephalon lie between?
Cerebrum and midbrain
What is the name given to the midline structure connecting the two cerebellar hemispheres?
Vermis
What parts of the brainstem are connected to the cerebellum via the peduncles?
Midbrain, pons and medulla
Which ventricle lies immediately anterior to the cerebellum?
4th ventricle
Which cranial fossa is the cerebellum in contact with?
Posterior cranial fossa
Which foramen does the cerebellum sit above?
Foramen magnum
What is the name of the pituitary stalk?
Infundibulam
What is the name of the fissure that seperates the cerebral hemispheres?
Longitudinal hemisphere
Which structure connects the two cerebral hemispheres?
Corpus callosum
What type of nerve fibres are found in the corpus callosum?
Commisural fibres
Which fold of dura mater seperates the cerebral hemispheres and the cerebellum?
Tentorium cerebelli
Which lobe of the brain contains the primary motor cortex?
Frontal
Which lobe of the brain contains the primary visual cortex?
Occipital
Which lobe of the brain contains the primary sensory cortex?
Parietal
Which lobe of the brain contains the primary auditory cortex?
Temporal
At what level does the spinal cord terminate in an adult?
L1/2
At what level does the spinal cord terminate in a newborn?
L2/3
At what vertebral level does the dura mater terminate?
S2/3
At what vertebral level does the arachnoid mater terminate?
S2/3
What happens to the pia mater inferior to the spinal cord?
Attaches to the coccyx (filum terminale)
At what vertebral level would you perform a lumbar puncture on an adult?
L3/4
How many pairs of spinal nerves are there?
31
From which arteries do the left and right vertebral arteries arise?
Subclavian