hms 4 Flashcards
bones of the skull
cranial vault and facial skeleton
bones in crainium and number
frontal (1) parietal (2) temporal (2) occipital (1) sphenoid (1)
3 sutures in cranium
coronal - parietal and frontal
lambdoidal- parietal and occipital
squamous- parietal and termporal
gaps between sutures
fontanelles
facial bones external
nasal (2)
zygomatic (2)
maxillary (2)
mandible (1)
3 layers of the meninges
dura mater
arachnoid mater
pia mater
Dura mater
outermost layer of meninges 2 layers
dense fibrous tough
inner layer= dural reflections
in between layers= venous sinuses
3 dural reflections (inward extension of dura mater)
faix cerebri
faix cerebelli
tentorium cerebelli
venous sinus
forms between inner and outer layers
venous drainage from the brain
Arachnoid mater
contains blood vessels
preposition- beneath, doesn’t extend sulci
subarachnoid space
between arachnoid and pia mater
filled with CSF
arachnoid granulations (villi)
perforate the dura
transport old CSF from subarachnoid space in venous sinus
Pia mater
transparent delicate covering
blood vessels in arachnoid sit on top
adheres to brain and follows gyri and sulci furrows
The ventricular system
CSF generated by choroid plexus lateral ventricle 3rd ventricle cerebral aqueduct 4th ventricle subarachnoid space enters venous blood circulation via arachnoid granulations/villi
dieseases
sampled to determine meningitis
hydrocephalus (abnormal accumulation of CSF)