1. Overview of NS and Development Flashcards
What are glia?
Non-neuronal cells in the central and peripheral nervous system
What are microglia?
Macrophages in the brain and spinal cord
What are the functions of astrocytes?
Provide structural support
Form the BBB
What is the function of oligodendrocytes?
Form myelin in the CNS
What are the functions of ependymal cells?
Line ventricles
Produce CSF
What are the 4 lobes of the cerebrum?
Frontal
Parietal
Occipital
Temporal
What structures make up the hindbrain?
Cerebellum
Pons
Medulla
What does the brainstem consist of?
Midbrain
Pons
Medulla
What are association fibres?
Interconnect cortical sites on one cerebral hemisphere
What are comissural fibres?
Connect cerebral cortex to subcortical structures
What does ipsilateral mean?
Same side
What does contralateral mean?
Opposite side
What does it mean to decussate?
Switch from 1 side to the other
What are the meningeal layers?
Pia mater Subarachnoid space Arachnoid mater Subdural space Dura mater Extradural space
Which layer is the CSF found?
Subarachnoid space
What arises from the ectoderm?
Epidermis
Nervous system
What arises from the mesoderm?
Bone
Muscle
Connective tissue
What arises from the endoderm?
GIT
Respiratory tract
What does the oropharyngeal membrane become?
Mouth
What does the cloacal membrane become?
Anus
What is found at the cranial end of the primitive streak?
Notochord
- Cartilaginous rod-like structure
- lies under neural tube
What do neural crest cells differentiate into?
Neurons and glial cells
Medulla of adrenal gland
Pigment containing epidermal cells
Skeletal and connective tissue of head
What day does zipping occur?
22
What does zipping accomplish?
Neuralisation is complete
CNS is now a closed tube
What does the telencephalon become?
Cerebrum
What does the diencephalon become?
Thalamus
Hypothalamus
What does the rhombencephalon/metancephalon become?
Pons
Cerebellum
Medulla
