Flashcards in CNS Deck (115)
What two tissues does the CNS comprise of?
Grey and white matter
What does grey matter contain?
Nerve cell bodies, dendrites and synapses
What does white matter contain?
Axons of nerves
What are clusters of cell bodies in the CNS called?
What causes the colour of white matter?
The fat in the myelin sheaths
How is white matter organised in the CNS?
organised into bunches called tracts
Where is the grey and white matter in the spinal cord?
grey matter is contained inside white matter on the periphery
Where is grey and white matter in the cerebral hemispheres?
Grey matter forms an outer cortex and white matter a central mass
Where and what is the basal nuclei?
In the deep part of the cerebral hemispheres and is interwoven grey and white matter
What is the basal nuclei also know as?
What is the CNS made up of?
Brain and spinal cord
What are ridges and furrows in the cerebral cortex called?
What are the two cerebral hemispheres separated by?
How is the cerebrum and cerebellum separated?
What is the major sulcus which crosses longitudinal fissure called?
What are folds of the cerebellum called?
What is the major gyrus on the lateral aspect called?
What is the cortex of the cerebellum made of?
Outer cortex is made up of grey matter with central nuclei
Where is the cerebellum found?
caudal to the cerebral hemispheres
What does the organises white matter look like?
resembles a tree
What is the white matter of the cerebellum often referred to as?
How many lateral hemispheres does the cerebellum have?
What is the central part of the cerebellum called?
How does the cerebellum connect to the brainstem?
by three peduncles
What fluid surrounds the brain and spinal cord?
Cerebrospinal fluid (CSF)
What does the CSF circulate round the brain in?
A series of ventricles
Describe the flow of CSF
Two lateral ventricles in the cerebral hemispheres communicate with a single third ventricle which surrounds the thalamus, the third communicates with the fourth ventral to the cerebellum and connects to the spinal cord
How can the cerebral hemispheres be divides according to bones of the skull?
Frontal, parietal, temporal, occipital
How can the cerebral cortex be divided according to function?
visual cortex in occipital lobe, motor cortex rostral to cruciate sulcus, somatosensory cortex next caudal sulcus and auditory in temporal