Head Flashcards
(22 cards)
What are the general structures that comprise the brain
White matter Grey matter Hemispheres Sulcus: sylvian fissure/ central gyrus Falx cerebri Meninges: dura matter, arachnoid, pia matter
what is grey matter and where is it found
neuron cell bodies
cerebral cortex
what is white matter and where is it found
myelinated axons
deep in the cortex
what is the gyri and sulcus
gyri- ridges
sulcus- grooves
what are the meninges
outermost, middle and inner membranes
Surrounds and protects the brain
Outermost membrane: the dura matter is the strongest
Middle membrane: arachnoid membrane (spiderlike)
Inner layer: pia matter
what are the lobes of the brain
frontal parietal temporal occipital cerebellum
what makes up the anterior cranial fossa
Composed primarily of the frontal bone, ethmoid bone, and lesser wing of the sphenoid bone
Contains the frontal lobes of the brain
What makes up the middle cranial fossa
Formed primarily by the body of the sphenoid and temporal bones
Houses the pituitary gland, hypothalamus and temporal lobes of the brain
what makes up the posterior cranial fossa
Formed by the occipital and temporal bones
Contains the cerebellum and brainstem
what are the 8 cranial bones
parietal frontal ethmoid sphenoid occipital temporal petrous mastoid
what is the falx cerebri
dura matter separating the hemispheres of the brain
what are the 3 facial bones
maxillary
zygomatic
mandible
what does the thalamus do
Serves as a relay station to and from the cerebral cortex for all sensory stimuli, with the exception of the olfactory nerves
what are the segments of the brain stem and what order are then in from superior to inferior
midbrain, pons, and medulla oblongata
what is the corpus callosum?
The largest and densest bundle of white matter fibres within the cerebrum
Forms the roof of the lateral ventricles and connects the right and left cerebral hemispheres
what are the cerebral-spinal fluid compartments
Lateral ventricles
Choroid plexus
Third ventricle
Cerebral aqueduct
what main vessels comprise the arterial supply of the head
internal carotid arteries anterior cerebral artery middle cerebral artery anterior communicating artery basilar artery posterior communicating artery
what main vessels comprise the venous drainage of the head
internal jugular veins
superior sagittal sinus
what main vessels make up the COW
Aorta brachiocephalic trunk left subclavian artery left and right vertebral arteries left and right common carotid arteries basilar artery posterior cerebral artery posterior communicating artery middle cerebral artery anterior cerebral artery anterior communicating artery
what are the two main nerves of the head
vagus
trigeminal
What are the three arteries feeding blood into the Circle of Willis?
Basilar artery
Left internal Carotid artery
Right internal Carotid artery
he Internal Carotid artery divides into what arteries at the Circle of Willis?
Middle Cerebral artery
Posterior communicating artery
Anterior cerebral artery
