lab 1 meninges, ventricles, central lobes sulci and gyri

Question 1

dura mater

Answer 1

the outermost membranous covering of the brain and spinal cord

Dural reflections: when the dura mater folds up on itsself to form the falx cerbri/cerebelli, tentorium cerebelli

Question 2

Dural venous sinuses

Answer 2

dural venous sinuses consists of an outer periosteal layer and an inner meningeal layer, the dural layers are usually fused and but split for the superior and inferior sagittal sinus and the straight sinus

Question 3

fourth ventricles

Answer 3

CSF drains Laterally via foramina of Luschka and more inferiorly there is a single foramen of Magendie

Question 4

diencephalon

Answer 4

thalamus
Hypothalamus
Pineal body (melatonin)

Question 5

Brainstem (midbrain)

Answer 5

divided into roof (tectum) and floor (tegmentum) by cerebral aqueduct

Tectum (roof)- superior and dorsal to cerebral aqueduct 2 pairs of bumps: the corpora quadrigemina
Superior colliculi: upper set of bumps and is for vision
Inferior colliculi: lower set of bumps and is the aurditoru relay and reflex

Tegmentum: inferior ventral cerebral aqueduct, Cerebral peduncles (2 halves of the midbrain) with an interpeduncular fossa in the middle the mamillary bodies and oculomotor nerves are in this space

Question 6

brainstem (pons and medulla)

Answer 6

pons is under the midbrain

the medulla:
The midline is the the pyrimidal decussion

The pyrimidal decussation splits the 2 medullary pyramids, then laterally is the olives

Question 7

anterior and posterior commisure

Answer 7

ant: connects the temporal lobes and olfactory bulbs
post: connects the midbrain