test 1- brain Flashcards
brain divided into 4 parts
- cerebellum
- cerebrum
- diencephalon
- brain stem
cerebrum contains
- frontal lobe
- parietal lobe
- temporal lobe
- occipital lobe
- insula
anterior to central sulcus
FRONTAL LOBE
posterior to the central sulcus
pareital lobe
inferior to lateral sulcus
temporal lobe
precentral sulcus is ___ to central sulcus
anterior
precentral gyrus is ____
ridge on anterior side of central sulcus
Diencephalon consists of
- thalamus
- hypothalamus
- epithalamus
midbrain, pons, and medulla oblongata are part of
brain stem
importance of choroid plexus
produces CSF
joins the L&R hemispheres of brain
corpus callosum
separate the anterior horns of the lateral ventricles
septum pellucidum
choroid plexus found in ____ventricle(s)
roof of third & 4th
cerebral aqueduct connects
third and 4th ventricle
the ___ connects the 2 thalami and crosses through the 3rd ventricle
interthalamic adhesion
3 arches from aorta
- brachiocephalic
- Left common carotid artery
- left subclavian artery
first branch of aorta
brachiocephalic
second branch of aorta
left common carotid
third branch of aorta
left subclavian
branch of aorta on right side
brachiocephalic
most common variant seen with aortic branches
L. Common Carotid Artery originating from brachiocephalic (innominate) artery
the ___ common carotid artery arise directly from aorta and is commonly longer then the __ common carotid artery
left
right
right common carotid artery originates from
brachiocephalic artery
common carotid arteries ascend the ___ neck ___ to the IJV
anterolateral
medial
CCA, IJV and vagus nerve enclosed in connective tissue called ____
carotid sheath
CCA terminates at ____
the bifurcation
CCA Bifurcate occurs at the upper border of the ___ cartilage into internal (ICA)and external carotid arteries (ECA)
thyroid
t/f: internal carotid artery branches outside of skull
false
External common carotid artery usually lies ____ to ICA, as it ascends courses postrolaterally
anteromedial
what level does the ECA originate
midcervical
T/F: external carotid artery supply the brain
false
what does the external carotid artery supply
face
ECA branches commonly seen on US
- superior thyroid
2. facial
___ carotid artery is usually larger than ___ carotid artery
internal
external
internal carotid artery is located ___ to ECA
lateral
Carotid bulb is slight dilation of the ___ cervical ICA
proximal
ICA becomes ___ after enters the skull
intracranial
ICA gives rise to____ artery which in turn gives rise to branches that anastomose with ECA branches
ophthalmic
____ ICA may become tortuous, coiled or kinked with ___ or progressive a disease
cervical
age
vertebral arteries arise from
subclavian, occasionally directly from aorta arch
t/f: vertebral arteries are usually symmetric
false
Asymmetric in about 75% of cases, ___ vertebral typically dominant
left
vertebral artery ascends neck through ___ ___ of cervical vertebrae
transverse process
Enter skull through foramen magnum
vertebral artery
vertebral arteries join intracranially to form
basilar
Portion of the intracranial that forms two curves (S shape) intracranially
Carotid siphon
first branch of intracranial artery
ophthalmic
ophthalmic artery Courses anterior laterally through the ___ foramen
optic
what intracranial artery is Important in collateral pathways
ophthalmic
The joining area of several arteries at the bottom (inferior) side of the brain to provide a collateral blood flow between the anterior and posterior arterial systems of the brain.
circle of willis
The larger terminal branch of ICA
MCA (middle cerebral artery)
THE MCA ___ or ___ travels in the Sylvain fissure
bifurcated or trifurcates
MCA is divided into __ branches
4
frequent site of aneurysm formation
anterior communicating artery
Posterior cerebral artery originate from
basilar
PCA joins __ to ___
Posterior cerebral artery
internal carotid artery
Terminates by dividing into paired PCAs (Posterior Cerebral Arteries)
basilar
