Session 1.5 - More brain anatomy Flashcards
What two cell type is the central nervous system made up of?
Neurones
Neuroglia
What are the three surface markings of the brain
Gyri (folds)
Sulci (grooves)
Fissures (clefs)
How is the cerebral cortex split?
By the falx cerebri and longitudinal fissue
How are the two halves of cerebral cortex linked?
Corpus callosum
Anterior and posterior commisures
What two unique structures does the dura form?
Dural partitions
Where does the falx cerebri lie, where does it attach and what is its functin?
Passes between two cerebral hemispheres
Anteriorly attaches to ethmoid and frontal bone, posteriorly to the tentorium cerebelli
Stabilises the brain laterally
Where does the tentorium cerebelli lie, where does it attach and what is its functin?
Covers and separates the cerebellu in the posterior cranial fossa from the posterior parts of the cerebral hemispheres.
Posterioly attached to occipital bone, laterally attached to temporal bone
What is the free edge of the tentorium cerebelli called?
Tentorial notch
What is the falx cerebri?
Small midline projection of dura mater in poterior cranial fossa. Posterioly attached to the occipital bone, superiorly attached to tentorium cerebelli.
Falx cerebelli stabilises the brain vertically
Where does the spinal cord end in adults?
L1/L2
What are the two enlargements o the spinal cord called?
Cervical enlargement (C5-T1_ Lumbosacral enlargement (L1-S3)
What is the distal end of the spinal cord caled?
Conus medullaris
Give three surface markings of the external spinal cord
Anterior median fissue
Posterior (dorsal) median sulcus
Posterolateral sulcus
What is the grey matter of the spinal cord?
rich in nerve cell bodies, which form the longitudinal columns along the cord. In cross section these columns form a characteristic H-shape in the central regions of the cord.
What is the white matter of the spinal cord?
o White matter surrounds the grey matter and is rich in nerve cell processes, which form large bundles (or tracts) that ascend and descend in the cord to other spinal cord levels, or carry information to and from the brain
