Neuro Flashcards
What are the 4 lobes of the brain?
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
What does is the action of the frontal lobe? (what does it contain?)
- Contralateral motor movement.
- Broca’s area: Speech and writing
- Intellectual functioning
- Thought processing
- Reasoning
- Memory
What it the action of the parietal lobe?
Interprets sensation (pain, touch, pressure) Proprioception
What is the action of the temporal lobe? (what does it contain?)
Wernicke’s area: understanding the spoken word
What does the occipital lobe control?
Processing visual images
Understanding written words
What is the action of the cerebellum?
Receives information from the sensory systems, the spinal cord, and other parts of the brain and then regulates motor movements.
Coordinates voluntary movements such as posture, balance, coordination, and speech.
Draw out the circle of willis:
From bottom up:
Basillar artery (with pontine arteries coming off)
Superior cerebellar artery
Posterior cerebral artery
Posterior communicating artery links these to middle cerebral arteries (internal carotids inside this)
Anterior communicating artery links these to anterior cerebral artery
What arteries are responsible for the blood supply to the brain?
Internal carotids
Vertebral arteries
Where do the internal carotid arteries originate from?
Common carotid arteries which arise (right arises from the brachiocephalic artery- first branch of aorta)
Where do the vertebral arteries originate?
Left and right subclavian arteries (right comes off brachiocephalic artery)
What part of the brain does the anterior cerebral artery supply?
Anteromedial portion of the cerebrum (middle front)
Supplies motor cortex
What part of the brain does the middle cerebral artery supply?
Majority of the lateral part of the brain
What part of the brain does the posterior cerebral artery supply?
Medial and lateral parts of the posterior cerebrum . (back of the brain)
What vein do all venous sinuses drain into?
Internal jugular vein
What are the main venous sinuses of the brain?
Superior sagittal sinus
Inferior sagittal sinus
Where do the 11 venous sinuses of the brain converge?
Confluence of sinuses (overlying internal occipital protuberance)
What is the straight sinus a continuation of?
The inferior sagittal sinus and great cerebral vein
What happens after the confluence of sinuses?
The transverse sinus continues bi-laterally and curves into the sigmoid sinus to meet the opening of the internal jugular vein.
What/ where is the cavernous sinus?
Paired dural venous sinus locates on either side of the sella turcica of the sphenoid bone
What structures are in the cavernous sinus?
O TOM CAT Oculomotor nerve Trochlear nerve Opthalmic branch + Maxillary branch of trigeminal nerve Carotid (internal) artery Abducens nerve
What are the ventricles of the brain and what are they responsible for?
Hollow spaces in the middles of the brain, responsible for the porduction, transport and removal of CSF.
What is the fornix of the brain?
C-shaped bundle of white matter (nerve fibres) that acts as a major output tract of the hippocampus
What does the fornix connect?
2 brain hemispheres, limbic system
Connects hippocampus to mammillary bodies
What is the limbic system of the brain?
Set of brain structures involved in behavioural and emotional responses (especially those for survival: feeding, reproduction, fight/flight)