Week 1 Flashcards
Two cells of the bilaminar disc
Epiblast and hypoblast
Process in which epiblasts move towards the primitive node
Neural induction.
The line dissecting the centre of the bilaminar disc
Primitive streak
3 layers of trilaminor disc
Endoderm
Ectoderm
Mesoderm
Area of trilaminar disc where duramater is formed
Mesoderm
Area of trilaminor disc where CNS , arachnoid and Pia mater is formed
Ectoderm
Where does lamina terminales appear?
Anterior neuropore
Name of the openings that close on either side of the neural tube
Neuropores
Cells released from neural tube to create the PNS
Neural crest cells
What day does the anterior neuropore close?
25
When does the posterior neuropore close ?
Day 27
What does failure of the anterior neuropore closure result in?
Anencephaly
What does failure of the posterior neuropore cause ?
Spinal bifida
What does astroglia do ?
Surround blood capillaries
What does the choroid plexus do?
Form CSF and form blood brain barrier
When do the 3 primary vesicles develop?
Week 4
Name the 3 primary vesicles and the 2 flexures
Prosencephalon Mesencephalon Cephalon flexure Rhombencephalon Cervicical flexure
Is the alar plate sensory or motor?
And which is the basal?
Alar = sensory
basal= motor
When does myelonation of the corticospinal tract occur ?
Completed in 2nd post natal year
When is myelination of the association neocortex complete ?
3rd decade
What week of development does the spinal cord extend the length of the vertebral column?
Week 8
Name the main sub cortical structures of the cerebrum/ telencephalon.
Hippocampus Amygdala Thalamus Hypothalamus Majority of basal root ganglia
What cortex is found in the pre central gyrus
Motor cortex
What cortex is found in the post central gyrus?
Somatosensory cortex
Where is CSF produced.
Choroid plexus
Which mater does CSF flow into?
Sub arachnoid space
How does CSF diffuse out of the choroid plexus?
Arachnoid granulations
What connects the lateral ventricle to the third ventricle??
Interventricular foramen
What is the choroid plexus lines with ?
Epedymal cells
How does CSF flow into the sub arachnoid space ?
2x lateral aperture
1x median aperture
Name the 4 sub arachnoid cisterns
Cisterna magna
Quadrigemital (superior) cistern
Interperduncular cistern
Pontine cistern
What is hydrocephalus?
Enlarged ventricles
Name the 4 suture junctions
Bregma
Lambda
Pteroin
Asterion
What is the area of the ethmoid bone in which the olfactory nerves pass through ?
Cribifrom plate
What dissects the centre of the ethnoid bone?
Cristi gali
Which 1 nerve does not sit under flax cerebri?
CN1
What cortex is found in the insula ?
Gustatory
Name the 4 dural sheets
Falx cerbri
Falx ceribelli
Tentorium ceribelli
Diaphragm sallea
Name the sinuses for venous drainage in the skull and describe each
Superior and inferior saggital sinus
Straight sinus
Transverse sinus
Sigmoid sinus
Confluence of sinus Cavernous sinus (CN 3, 4 5 (1&2) 6) and Int. carotid
