Term
| The ventral column of gray matter in the spinal cord is also known as what during development? What populates it? |
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Definition
| basal plate, somatic motor neurons |
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Term
| What does the notochord ultimately become? |
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Definition
| nucleus pulposus of intervertebral discs |
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Term
| The dorsal column of gray matter in the spinal cord is also known as what during development? What populates it? |
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Definition
| alar plate, association or interneurons that relay sensory information to appropriate areas of the CNS |
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Term
| Located in the dorsal aspect of the basal plate in the thoracolumbar and sacral regions of the spinal cord this area contains the neurons of the sympathetic and parasympathetic nervous system of the ANS respectively. |
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Definition
| intermediolateral cell column |
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Term
| Neural crest cells are located where on the neural fold? |
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Definition
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Term
| Fusion of the neural folds and formation of the neural tube is known as what? |
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Definition
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Term
| The ____ portion of the neural tube is the developing brain and the _____ portion of the neural tube is the developing spinal cord |
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Definition
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Term
| neuroepithelium of the neural tube is supplanted by these cells from which neurons are formed. |
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Definition
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Term
| These cells in the ventricles of the brain produce CSF. |
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Definition
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Term
| neuroblasts which are destined to become neurons establish a _____ layer surrounding neuroepithelial cells which becomes the gray matter of the spinal cord |
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Definition
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Term
| What will happen to the dermamyotome for a given somite? |
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Definition
| Will become muscle mass into which the axons of somatic motor neurons will terminate. |
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Term
| Specializations on the tips of axons of motor neurons leaving the developing spinal cord that guide nerve fibers to their destination is known as what? |
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Definition
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Term
| What part of the growth cone sense chemical and physical markers? |
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Definition
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Term
| Peripherally directed portions of sensory neurons and axons of somatic motor neurons join where during development? |
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Definition
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Term
| The dorsal mass of cells in the somite is known as ____ and will become muscle where? |
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Definition
| epimere, musculature of the neck and back |
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Term
| The ventral mass of cells in the somite is known as ____ and will become what muscles? |
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Definition
| hypomere, musculature of thoracic and abdominal walls |
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Term
| At birth the spinal cord ends at vertebral level ____ and an adults spinal cord ends at vertebral level _____? |
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Definition
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Term
| Elongated dorsal and ventral roots of the lumbar and sacral spinal nerves to compensated for the distance between spinal level of origin and the vertebral level at which they exit are collectively called what? |
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Definition
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Term
| Failure of the entire neural tube to close results in? If the problem is localized to a portion of the developing spinal cord? Restricted to cranial portion of neural tube? |
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Definition
| Craniorachischisis totalis, partial rachischisis, anencephaly |
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Term
| Congenital defect in the formation of the vertebral arch due to localized disruption of induction mechanisms in the lumbosacral region of the vertebral column. |
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Definition
| spina bifida (occulta or cystica) usually L4-S1 |
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Term
| What are the two forms of spinabifida cystica? |
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Definition
| Meningocele (herniation of the meninges), Meningomyelocele (herniation of the meninges and spinal cord that can lead to hydrocephaly) |
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Term
| Special population of neuroepithelium located at the margin of neural plate and neural folds. |
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Definition
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Term
| All peripheral ganglia in the thorax whether somatic or autonomic are derived from what cell type? |
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Definition
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Term
| Neural crest cells that fail to migrate to their appropriate position can form catecholamine producing tumors known as? |
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Definition
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Term
| Failure of neural crest cells to migrate into the walls of the large bowel resulting in an absence of peristalsis causes what disease? |
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Definition
| Congenital Megacolon (Hirschprung's Disease) |
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