Questions Flashcards
What structures arise from vertebral arteries?
Superior cerebellar artery
Anterior cerebellar artery
Posterior cerebral artery
What structures arise basilar artery?
Anterior spinal artery
Posterior spinal artery
Posterior cerebellar artery
What vessel supplies
medulla, upper spinal cord?
Vertebral
What vessel supplies
pons, cerebellum, midbrain
Basilar
What structure produces CSF?
Where in brain located?
Outline path?
CSF produced by choroid plexus
Located lateral ventricle, 3rd and 4th ventricles
CSF from lateral ventricles
Foramen munroe (interventricular foramen)
Third ventricle
Cerebral aqueduct
Fourth ventricle
Drain out foramen Luschka and Magendie
Subarachnoid space
How CSF reabsorbed?
Arachnoid villi
Collective- arachnoid granulations
External to internal state meningeal layers?
Dura
Arachnoid
Pia
DAP
Where is hippocampus and amygdala located?
Temporal lobe
Where is primary motor cortex located?
Where is somatosensory cortex located?
Primary motor cortex- Frontal lob precentral
Somatosensory cortex- Parietal lobe postcentral
Where is primary visual cortex located?
Occipital lobe
Where is primary auditory cortex located?
Temporal lobe
Where is wernicks area located?
Where is brocas area located?
Wernicke- Parietal
Broca- Frontal
Blood supply to arm and auditory area?
Middle cerebral
Blood supply to brocas?
Left middle cerebral
What is arrow pointing to?
Superior saggital sinus
Middle cerebral artery
Where does ICA enter skull cranium?
Enter skull- Carotid canal
Enter cranium- foramen lacerum
Where does optic nerve enter? Bone?
Optic canal- lesser wing sphenoid bone
Where does facial nerve exit? Bone?
IAM in petrous part temporal bone
Where does spinal cord enter? Bone?
Foramen magnum
Occipital bone
Oculomotor enter?
Superior orbital fissure
Greater and lesser wing sphenoid
Where visual cortex located?
What artery supply visual cortex?
Visual cortex located occipital lobe brain
Supplies posterior cerebral artery
What nerve controls eye muscles?
Mainly oculomotor (eyelids and size)
Except S04 LR6
What occurs if occulomotor damaged to eye postition?
Eye forced down and out
Only S04 LR6 work
Draw 6 extraocular and state movement?
● Medial rectus: adduction
● Lateral rectus: abduction
● Superior rectus: elevation
● Inferior rectus: depression
● Superior oblique: adduction and depression
● Inferior oblique: adduction and elevation
State list from tympanic membrane to oval window?
Tympanic membrane, malleus, incus, stapes, oval window
What cranial nerves would mass cavernous sinus effect?
Trochlear
Abducens
Trigeminal
Occulomotor
You examine a patient who on visual field testing has a right lower homonymous quadrantanopia. Where is the lesion?
Left parietal – the fibres of the lower quadrants go through Baum’s loop
As the left side of the eye goes to the left side of the brain, it must be left parietal
Where do the majority of the descending fibres of the corticospinal tract decussate?
80% of the corticospinal tract decussate in the medullary pyramids and travel in the lateral corticospinal tract.
10% join the ipsilateral lateral corticospinal tract
10% travel in the anterior corticospinal tract and cross in the spinal cord
Where is location of olfactory, optic?
Olfactory bulb
Lateral geniculate body
If vestibulocochlear compressed what other CN risk?
Facial
