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51 Cards in this Set
- Front
- Back
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Splanchic mesoderm
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smooth muscles associated with viscera
cardiac muscles |
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Paraxial mesoderm
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skeletal m.
extrinsic mm. of eye occiptial myotomes somites |
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What is developed from the sclerotome division of the somite?
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vertebra
ribs |
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What is it called when the bones of the skull fuse prematurely
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craniosynostosis
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What develops along inferior margin of developing limb?
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ZPA
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Remnants of notochord are present in the adult...
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IVD
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components of skeletal system derived from:
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ectoderm
mesoderm |
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Neurocranium bones develop by? (occipital)
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endochondral & intramembranous ossification
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what plays in the role in the formation of extremity digits?
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apoptosis
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What develops from/in the diencephalon?
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thalamus
3rd ventricle pineal glad hypothalamus posterior lobe of pituitary gland |
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what occurs as a consequence of the unequal growth rates of the spinal cord and vertebral column?
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cauda equina
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What appears earlier in the developing spinal cord?
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mantle layer
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The arnold-chiari malformation is often associated with individuals who also have:
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spina bifida cystica
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Neurons in the what ganglia are derived from neural crest cells?
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sympathetic
parasympathetic dorsal root ganglia |
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What is the site of closure of the anterior neuropore?
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lamina terminalis
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What originates in the cervical somites C3-C5?
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diaphragm
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What originates in the hypomere?
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thorax- external, internal & innermost intercostals, transversus thoracis, infrahyoid mm.
abdomen- external, internal abdominal oblique mm., transverse abdominis, rectus abdominis |
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What originates in the occipital somites?
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tongue, mm. of mastication and facial expression
masseter m. |
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What originates in the preotic myotomes?
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superior oblique muscle of the eye
lateral rectus SO4, LR6, all else 3 |
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What originates in the epimere (dorsal division of mytome)?
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extensor mm. of neck & back
innervated by dorsal ramus of spinal n. splenius capitis m. longisimus capitis m. |
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What is innervated by ventral rami of spinal nerves?
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flexors & pronators of upper limb; flexors & adductors of lower limb
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What is innervated by dorsal rami of spinal nerves?
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extensors & supinators of upper limb
extensors & abductors of lower limb |
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The alar plate is associated with sensory or motor fxn?
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sensory fxn
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What is derived from the mesencephalon?
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inferior colliculi
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What is it called when the cranial vault is incomplete? (anencephaly)
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cranioscchisis
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What occurs when the cranial neuropore fails to close?
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anencephaly
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Where is the developing spinal n. that contains neural processes derived from?
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basal plate
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What occurs at the site of the formation of the cerebellum?
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pontine flexure
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What forms by intramembranous ossification?
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clavicle
parietal bone maxilla |
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Each vertebra forms from how many pairs of somites?
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two
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What is determined by the AER (apical ectodermal ridge)?
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the proximo/distal axis of developing limb
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What is derived from the neural ectoderm?
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neurons of the:
dorsal root ganglion ventral horn of spinal cord |
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Localized hypertricosis is associated with?
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spina bifida occulta (cleft vertebra)- vertebral arches do not form
excessive hair |
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Absence of hair is called?
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atrichia
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What is an anomaly associated with keratinization of the skin?
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ichthyosis
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What happens when melanocytes don't produce melanin?
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albinism
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What originates in the ectoderm?
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sebaceous glands
epidermis |
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What originates in the mesoderm?
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subcorium
dermis of the back |
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What requires both diffusible signals and specific receptor molecules?
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paracrine signaling
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What are used during embryonic induction?
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paracrine & juxtacrine signaling
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The basal plate is located where on the mantle and what is its fxn?
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ventral
motor fxn innervates skeletal muscle |
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What is it called when there is a reduced number of cervical vertebra and others are fused or abnormal?
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Klippel-Feil syndrome
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What is it called when neural tissue and/or meninges are exposed?
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spina bifida cystica
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What is derived from the hypomere?
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sternohyoid m.
infrahyoid mm. |
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What is derived from the epimere?
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extensor mm. of neck & back
longisimus capitis innvervated dorsal ramus of spinal n. |
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What ossifies by endochondral ossification?
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femur
humerus |
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metenchephalon
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cerebellum
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diencephalon
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hypothalamus
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mesencephalon
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inferior colliculi
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myelencephalon
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medulla oblongata
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telencephalon
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cerebrum
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