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Embryo-Neuro
Embryology development of nervous system NWHSU
| Question | Answer |
|---|---|
| Besides ganglia, Schwann cells, and the cartilages of the branchial arches, list 4 derivative of the neural crest. | melanocytes, odontoblasts (that's dentin!), small contribution to pia and arachnoid, chromaffin cells of the adrenal medulla |
| The thalamus and hypothalamus develop from what embryonic components? Include secondary brain vesicle and plate(s). | alar plate of diencephalon |
| Component that forms astrocytes and oligodendrocytes, but not ependymal cells. | gliablast |
| Primordium for the cerebellum | rhombic lips of the metencephalon |
| Functional classification (use 3 letters) of the columns in the basal plate of the myelencephalon. | GSE, SVE, GVE |
| Functional classification of the columns in the basal plate of the metencephalon. | GSE, SVE, GVE |
| Functional classification of the columns in the basal plate of the mesencephalon. | GSE, GVE |
| Brain vesicle which forms only the pons and crebellum. | metencephalon |
| Briefly discuss how the dorsal roots of spinal nerves develop. | from neural crest |
| What develops form the corpus striatum? | future caudate and lenticular nuclei |
| The primordium of the cerebral cortex. | pallium |
| The epithalamus develops from what embryonic components? | roof plate of diencephalon |
| The bilateral longitudinal groove in the developing spinal cord used to separate basal and alar plates. | sulcus limitans |
| Briefly discuss the differentiation of the microglia. | from mesenchyme |
| Myelination in the spinal cord begins about ____ month of fetal development. Additional at birth, the cord ends at the ____ vertebral level. | 4th; L3 |
| Anomaly produced when any area of the neural tube fails to close; nervous tissue remains flattened and exposed to surface. | rachischisis |
| Anomaly usually due to aqueductal stenosis. | hydrocephalus |
| Neurulation occurs mainly during the 5th week. | False |
| The anterior neuropore closes about day 25. | True |
| The posterior neuropore closes about day 25. | False |
| Lack of brain tissue is ______. | anencephaly |
| The mantle layer gives rise to the ____. | neuroblasts and gliablasts (gray matter) |
| What forms the white matter? | Marginal layer - axons of neuroblasts and gliablasts |
| The last neuroepithelial layer to form. | ependymal layer |
| What functional classifications are found in the basal plates of the spinal cord? | GSE |
| What functional classifications are found in the alar plates of the spinal cord? | GSA, GVA |
| Where does the lateral horn of spinal cord form? | junction of basal and alar plates |
| Cranial nerves found in mesencephalon. | CN 3 and 4 |
| Cranial nerves found in metencephalon. | CN 5, 6, 7 |
| Cranial nerves found in myelencephalon. | CN 9 and 10 |
| How is the 4th ventricle created? | Myelencephalon lateral walls rotatate during development to form the cavity or lumen. |
| Functional classification of the columns in the alar plate of the myelencephalon. | GVA, SVA(gustatory), GSA and SSA on lateral position |
| What forms from cells migrating from alar plate to the basal plate of the myelencephalon. | olivary nuclei |
| Describe how pontine nuclei are formed. | Cells from alar plates in metencephalon migrate ventrally inter basal plates. |
| What forms from the axons growing from pontine nuclei to the cerebellum? | middle cerebellar peduncles |
| Functional classification of the columns in the alar plate of the metencephalon. | GVA, SVA, GSA and SSA (lateral column) |
| Do the cells of substantia nigra and red nucleus arise from alar plate of mesencephalon? | No, the basal plate (according to Wallace not Langman) |
| What components comprise the epithalamus? | habenular nuclei, epiphysis, havenular commissure, and posterior commissure |
| Describe the structure of the diencephalon. | A roof plate and two alar plates; lacks floor and basal plates. |
| What are the hypothalamic derivatives of the diencephalon? | mammillary bodies and neurohypophysis |
| Components of telencephalon? | cerebral hemispheres including basal nuclei, lateral ventricles, interventricular foramina, lamina terminalis |
| How do cerebral hemispheres begin? | During the 5th week a bilateral evagination of the lateral wall of the prosencephalon. |
| What arises from increase of axons of cerebral cortex? | internal capsule |
| The internal capsule splits the corpus striatum into ____. | caudate and lenticular nuclei |
| The putamen and globus pallidus arise from ____. | lenticular/lentiform nucleus |
| When is the insula formed? | 7 months |
Created by:
sdschwartz
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