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Last minute embryo
| Question | Answer |
|---|---|
| telencephalon | cerebral hemisphere; lateral ventricles |
| diencephalon | thalamus, hypothalamus, optic nerves/tracts; third ventricle |
| mesencephalon | midbrain; aqueduct |
| metencephalon | pons, cerebellum; upper part of fourth ventricle |
| myelencephalon | medulla; lower part of 4th ventricle |
| neuropores fail to fuse 4th week leads to | persistent connection between amniotic cavity and spinal canal |
| increased AFP + acetylcholinesterase in CSF | neural tube defect |
| increased AFP alone where? | amniotic fluid and maternal serum |
| spina bifida occulta | failure of bony spinal canal to close. dura intact |
| meningocele | meninges herniate through spinal canal defect |
| meningomyelocele | meninges and spinal cord herniate through spinal canal defect |
| adenohypophysis | surface ectoderm |
| lends of eye | surface ectoderm |
| sensory organs of ears | surface ectoderm |
| epithelial lining of oral cavity | surface ectoderm |
| anal canal below the pectinate line | surface ectoderm |
| salivary, sweat, and mammary glands | surface ectoderm |