Neuro Imaging Flashcards
what are the useful landmarks for imaging the brain
Lateral fissure
Central sulcus
Parietal-occipital fissure
Tentorium cerebelli
what does the frontal lobe do
executing behaviour
Motor cortex- direct control of voluntary muscles via the brainstem and cord
Pre frontal cortex executive function;planning and executing complex behaviour
what two cortex are in the frontal lobe
motor cortex
pre-frontal cortex
what does the motor cortex contain
homunculus
what’s the difference between pre-central gyrus and post central gyrus
pre central gyrus – has the primary motor cortex
Post central gyrus – has the primary somatosensory cortex
what does the parietal lobe do
Integration of sensory information
Primary somatosensory cortex post central gyrus and
Visuospatial processing
Complex sensory processing
what are the black spaces in the Brian
CSF
what happens if you have a lesions anteriorly
effects motor function
what happens if you have a lesions posteriorly
effects sensory function
what does the temporal lobe do
Auditory perception,
language, speech, memory, emotional response
what does the occipital lobe do
Primary visual cortex
describe an MRI photo of the optic pathway
MRI scan through the orbits
Can see the globes and lens – lens is dark - doesn’t contain so much free water
Coming of the back of the globe you can see the optic nerev can see the CSF nerve sheath around it
Goes through a bony canal
Can see optic chiasm
Can see the optic radiations that it gives of
where is the corpus callosum
it sits on top of the lateral ventricle
what does the cerebellum do
Motor control
Coordination
Posture/balance
Equilibrium
what does the brainstem have in it
cranial nerve nuclei 3-12 and the white matter tracts
what is the largest cranial nerve (not the longest)
trigeminal nerve
what are the imaging options
Skull x ray
computerised tomography
MRI
when is a Skull X ray used
Obsolete
Depressed skull # or penetrating injury only