Scalp And Meninges Flashcards
What is below the scalp?
Layer of bone that we call the skull. :-)
Layers of the Scalp
Skin Connective tissue (dense) App neurotic layer Loose areolar tissue Periosteum
3 layers of cranial meninges
Dura Mater
Arachnoid Mater
Pia mater
What is the danger area of the scalp?
Loose CT (areolar)
Why is that area the danger area of the scalp?
Infections can easily spread to eyelids and root of nose because the frontally inserts into skin and subcutaneous tissue rather than bone
What is the medical term for swelling around the eyes?
Periocular ecchymosis
Why does periocular ecchymosis result in swelling around the eyes?
Because the damage is in the danger area of the face (scalp) allowing blood to pool in the potential space of the loose CT
Where does an epidural hemorrhage occur?
Between the periosteal layer of the dura mater and the skull
What’s another word for epidural hemorrhage?
Extradural
What causes and epidural hemorrhage?
Tearing of the branches of the middle meningeal artery as a result of blunt trauma to the pterion
What are the two layers of the dura mater?
Periosteal and meningeal
Where does the periosteal layer of the dura mater firmly attach?
The skull, duh…
What is the meningeal layer of the dura mater in close contact with?
The arachnoid mater
What does the subarachnoid space separate and what is it filled with?
It separates the arachnoid and pia mater and is filled with CSF
(Only normally occurring space)
What does the fall cerebri do?
Separates the two hemispheres of the brain
What are the three types of meningeal hemorrhages from best to worst prognosis?
Epidural
Subdural
Subarachnoid
Name the 4 periosteal rural infoldings.
Falx cerebri
Tentorium cerebelli
Falx cerebelli
Diafragma sellae
Dural venous sinuses are located between what layers of the dura mater?
Periosteal and meningeal
The confluence of sinuses is the meeting place for what Dural sinuses?
Superior saggital
Straight
Occipital
Transverse
What are the leptons binges composed of?
Pia and arachnoid mater
Sensory innervation of the dura mater occurs via what nerves?
V1
V2
V3
C1-2(3)
What are arachnoid granulations?
Projections of the subarachnoid space through the dura mater into the Dural venous sinuses
What is the purpose of arachnoid granulations?
Drainage of CSF
What is the epidural space?
Potential space between the periosteal layer of the dura mater and the skull
