neurology Flashcards
state the parts of the brain
cerebrum
cerebellum
diencephalon
brainstem
embryologically, which two vesicles of the neural tube give rise to the brainstem
mesencephalon and hindbrain
what are the cavities (of the ventricular system) that lie within the brainstem
cerebral aqueduct
IV ventricle
what cranial nerves can you see emerging from the pontomedullary junction
- V emerges from the lateral aspect of mid points
- VI emerges from the pontomedullary junction
- VII emerges from the cerebellopontine angle
- VIII emerges lateral to the facial nerve
what is the function of the olives
sends signals to cerebellum
what is the function of the pyramids
contains corticospinal fibres- regulates muscle fibres
what is the function of the decussation of the pyramids
marks border between spinal cord and medulla oblongata - marks crossing
what structure does the “open” part of the medulla open into
IV ventricle
through which foramen does the medulla pass to become the spinal cord
foramen magnum
what is the middle cerebellar peduncle made up of
centripetal fibre - fibres of pontine nuclei
what part of the brain lies immediately superior to midbrain
forebrain cerebellum
what part of the brain lies immediately inferior to the midbrain
pons
what is the diencephalon made up of
thalamus, hypothalamus, epithalamus
what are the surface projections visible on the surface of the hypothalamus
maxillary body and lamina terminalis
what is the name given to the midline structure connecting the two cerebellar hemisphere
vermis
name the three lobes of each cerebellar hemisphere
anterior, posterior and flucculondar
what is the name of the ventricular space that lies immediately anterior to the cerebellum
fourth ventricle
identify the foramen in the skull that the cerebellum sits above
foramen magnum
what is it called when tonsils may herniate through the Forman magnum
cerebellar coning
what are the lobes of the brain
frontal
parietal
occipital
temporal
what name is given to the large fissure separating the to cerebral hemispheres
longitudinal fissure
what type of nerves fibres are found in the corpus callosum
commissural
what is the tentorium cerebelli
fold of dura mater that covers the cerebellum
name the key surface features on the brain
- lateral sylvian fissure
- central sulcus
- parieto- occipital sulcus
- calcimine sulcus
- frontal pole
- occipital pole
- temporal pole
list the functional areas of the cerebral hemispheres
motor cortex sensory cortex wernickes area visual cortex auditory cortex brocas area
which lobe contains the primary motor cortex
frontal lobe
which lobe contains the primary visual cortex
occipital lobe
what lobe contains the primary sensory cortex
parietal lobe
what lobe contains the primary auditory cortex
temporal lobe
what parts of the vertebrae have to be removed to open up the spinal cord
lamina
what structures apart from the spinal cord and the meninges lie in the spinal canal
cerebral spinal fluid
at what vertebral level does the spinal cord terminate
the adult - L1/L2
the new born - L3
at what vertebral level do the dura mater terminate
S2/S3
At what vertebral level do es the arachnoid mater terminate
S2
what happens to the Pia mater inferior to the spinal cord
fuses with filum terminale
at what vertebral level would you perform a lumbar puncture on an adult
L3-L4
how many pairs of spinal nerves are there
31
what are upper motor and lower motor neurones and where are they located
form a 2 neurone circuit, upper motor neurones originate in the cerebral cortex and travel down the brain stem, lower motor neurones begin at the spinal cord
describe the blood supply to the brain
there are two paired arteries which are responsible for the blood supply to the brain; the vertebral arteries and the internal carotid arteries
from which arteries do the left and right vertebral arteries arise
subclavian artery
at which vertebral level do the left and right internal carotid arteries arise
C4
How is the basilar artery formed and which part of the brainstem is it most closely related to
formed from the confluence of vertebral arteries, directly supplies brainstem and cerebellum
what artery supplies the primary motor cortex
branches of middle cerebral artery, anterior cerebral artery
what artery supplies the primary sensory cortex
anterior/ middle cerebral artery
what artery supplies the primary visual cortex
posterior cerebral artery
what artery supplies the primary auditory area
middle cerebral artery
what artery supplies the area for olfaction
posterior olfactory artery - anterior cerebral artery
what parts of the brain do the vertebra-basilar arteries supply
cerebellum, brainstem, midbrain
describe the carotid sinus
it is a pressure receptor which monitors the flow of blood to the head. Sensory nerves from the carotid sinus runs in the glossopharyngeal nerve and vagus nerve
describe the venous drainage of the brain
the brain is drained by a series of veins which drain into dural sinuses
into which veins in the neck do these dural venous sinuses drain into
internal jugular which passes through the jugular foramen
describe emissary veins
small veins that connect the cranial venous sinuses with the dipoles of the skull
what is the location of the cavernous sinus
each side of sella turica
what structures does the falx cereberi separate
right and left cerebral hemispheres
what is the fold of dura that surrounds the pituitary stalk called
diaphragma sellae
which foramen does the middle meningeal artery enter
foramen spinosum
which artery is the maxillary artery a terminal branch of and within which glandular structure is it given off
external carotid artery, parotid gland
what embryological structure do ventricles form from
neural tube
what is the name given to the specialised structures that lie in the ventricles that generate CSF
choroid plexus
how does CSF pass into the subarachnoid space from the 4th ventricle
foramen of lushar and foramen of magendie
name the 4 parts of the corpus callosum
splenium
trunk
genum
rostrum
describe septum pellucidum
a thin sheet which lies in the mod saggital plane and separates the anterior horns of the two lateral ventricles
what is the bulbous projection on the flower of the lateral ventricle called
caudate nucleus
what is the thalamus
a sensory relay area made up of smaller masses of grey matter nuclei, each with different functions.
state some functions of the hypothalamus
- autonomic functions
- sleep-wake cycle
- temperature regulation
- circadian rhythm control
- endocrine functions
- reward-punishment
what structures make up the basal ganglia
lentiform nucleus and caudate nucleus
which cerebral artery through one of its branches supplies the internal capsule
middle cerebral artery
which group of structures is the substantia nigra functionally a part of
midbrain
state the 3 coronal sections of the brain
- anterior section - in the coronal plane that passes just posterior to the optic chaism
- middle section - in the coronal plane that passes just posterior to the optic chasm
- posterior section - in the coronal plane that passes through the selenium (posterior part) of the corpus callosum
which aspect of the spinal cord receives sensory nerve fibres
dorsal column
from which aspect of the spinal cord do motor nerve fibres project
ventral column
describe cranial nerve I
olfactory - cribifrom plate - sensory
describe cranial nerve II
optic - optic canal - sensory
describe cranial nerve III
oculomotor - superior orbital fissure - motor - PS
describe cranial nerve IV
trochlear - superior orbital fissure - motor
describe cranial nerve V
trigrminal- 3 branches - both
describe cranial nerve V1
ophthalmic - superior orbital fissure
describe cranial nerve V2
maxillary - foramen rotundum
describe cranial nerve V3
mandibular - foramen ovale -
describe cranial nerve VI
abducens - superior orbital fissure - motor
describe cranial nerve VII
facial - internal acoustic meatus - both - PS
describe cranial nerve VIII
vestibulocochlear - internal acoustic meatus -sensory
describe cranial nerve IX
glossopharyngeal - jugular foramen - both - PS
describe cranial nerve X
vagus - jugular foramen - both - PS
describe cranial nerve XI
accessory - jugular foramen - motor
describe cranial nerve XII
hypoglossal - hypoglossal canal - motor
what cranial nerve can be tested by pupillary light reflex
optic nerve
what cranial nerve can be tested by touch over the surface of cheek
maxillary nerve
what cranial nerve would be testing if you asked a patient to stick their tongue out
hypoglossal nerve