Imaging of the brain Flashcards
Function of coronal suture
Separates frontal and parietal bones
Function of sagittal suture
Separates parietal bones
Function of lambdoid suture
Separates parietal from occipital
Function of squamous suture
Separates temporal from parietal
Which suture fuses early on in life?
Metopic
What are the cranial fossa separated by?
Sphenoid and petrous bones
Function of Sylvian fissures
Separates frontal from parietal lobe
Where is primary motor cortex?
Anterior to central sulcus, within posterior frontal lobe
Where is primary sensory cortex?
Posterior to central sulcus, within anterior parietal lobe
Function of transverse fissure
Separates parietal from occipital lobe
Also called Pareto-occipital fissure
Where are the temporal lobes?
Floor of middle cranial fossa
Extend towards occipital lobe
What is the tentorium?
Thick band above cerebellum
Where are the cerebellar tonsils?
Descend through foramen magnum in disease (e.g. increased ICP)
What is a Chiari malformation?
Tonsils pointed inferiorly, issues with cervical spine and thoracic/cervical cord
What is the lentiform nucleus made from?
Putamen and globus pallidus
What is the corpus callousum?
Bundle of white matter tracts
Function of corpus callous
Communication between hemispheres
How does hydrocephalus form?
Cysts in pineal gland
What connects the third ventricle to the lateral ventricle?
Foramen of Monro
What are the basal cisterns?
CSF reservoirs around base of brain
What is the internal carotid artery formed from?
Two middle cerebellar arteries
What does the basilar artery separate into?
Posterior cerebral arteries
Where is the most common site of an aneurysm?
Anterior communicating arteries
Risk factors for venous thrombosis
Hormonal imbalance, prothrombotic, infection, tumours
Symptoms of venous thrombosis
Headache, decreased consciousness, vomiting, vision
Main drainage of the brain
Cortical veins, straight sinus, transverse sinus which runs into sigmoid sinus
What do all veins drain into?
Internal cerebral veins
