cranial blood supply and dural venous sinuses

most external layer of the scalp

skin

what is in the dense connective tissue layer of the scalp

blood vessels and nerves

scalp layer superficial to the loose connective tissue

aponeurosis

what is in the aponeurosis layer of the scalp

sheetlike tendon of occipitofrontalis muscle

role of loose connective tissue in the scalp

allows for scalp movement and collects fluids

scalp layer that covers the bone

pericranium

calvaria

dome like portion of the skull

layers superficial to the calvaria

skin, dense connective tissue, aponeurosis, loose connective tissue, pericranium

layers deep to the calvaria

dura, arachnoid, and pia mater

periosteal layer

superficial layer of dura mater that is flush with the calvaria

meningeal layer

deep layer of dura mater that is against brain and spinal tissue

tough fibrous layer under the calvaria

dura mater

layer that provides support for blood vessel network and allows for CSF flow

arachnoid mater

layer that directly adheres to brain or spinal cord

pia mater

shock absorbing fluid that also provides waste filtration and nutrients to the brain

cerebral spinal fluid

cranial epidural space

pathological space in brain between the dura layer and bone

spinal epidural space

fat filled space between dura layers in the spinal cord

subdural space

pathological space in between the dura and arachnoid mater

sub arachnoid space

where the cerebral spinal fluid circulates in the arachnoid mater

accumulation of blood in cranial epidural space

epidural hemorrhage

accumulation of blood between dura and arachnoid mater traveling to the dural sinuses

subdural hemorrhage

artery or vein rupture that causes accumulation of blood in the arachnoid space where just CSF should be

subarachnoid hemorrhage

arteries that carry blood to your brain branching off of the common carotid arteries

internal carotid arteries

arteries that carry blood to the brain branching off the subclavian artery through the foramen transversarium

vertebral arteries

anastomoses between vertebral and internal arteries that provide multiple pathways to the brain

cerebral arterial circle

artery where the internal carotid arteries merge together

basilar artery

terminal branches in the cerebral arterial circle that supply blood to brain tissue

anterior, middle, and posterior cerebral arteries

artery that connects the two anterior cerebral arteries together

anterior communicating artery

artery that connects the middle and posterior cerebral artery together

posterior communicating artery

supplies blood to midline frontal and parietal lobes

anterior cerebral artery

supplies blood to lateral temporal, parietal, and portion of frontal lobe

middle cerebral artery

supplies blood to occipital and inferior temporal lobes

posterior cerebral

artery that supplies blood to the cranium but not the brain branching off the common carotid artery

external carotid artery

branch off the external carotid artery that also branches off into the middle meningeal artery

middle maxillary artery

branch off of the internal maxillary artery that supplies blood to the dura

middle meningeal artery

draws blood out of the subarachnoid space and dumps it into the veinus dural sinus

bridging vein

big sickle shaped layer in the middle of the dural layer

falx cerebri

part of the dural layer that comes down and separates the two halves of the cerebellum

falx cerebelli

part of the dural layer that separates the cerebrum and cerebellum

tentorium cerebelli

inferior sagittal sinus

superior sagittal sinus

straight sinus

great cerebral vein

right transverse sinus

sigmoid sinus

cavernous sinus

sigmoid sinus

where do the external jugular veins drain

into the internal jugular vein

where do the internal jugular veins drain

into the brachiocephalic veins

where do the inferior petrosal sinus and sigmoid sinus drain

into the external jugular vein

where do our brachiocephalic veins drain

into the superior vena cava