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Initiates differentiation of the somites
- Whh (dorsal neural tube)
- Shh (notochord)
Forms the intrinsic back muscles
Epimere - dorsal myotome (formed from the dermomyotome)
Forms the skin
Dermotome - from the dorsomyotome
Forms the limb buds
Vertebral bodies are formed from...
The caudal portion of a sclerotome and the cranial portion of the overlying sclerotome
The nucleus pulposus is a remnant of what embryonic tissue?
Lateral plate mesoderm gives rise to these structures (4)
- Connective tissue
Paraxial mesoderm divides into these two structures
- Somitomeres (cranial)
- Somites (occiput-caudally)
Mesenchymal cells that form from the ventral region of each somite
Sclerotome give rise to these structures (2)
Dermomyotome is divided into these 2 cell types
Dermotome develops into
Dermis of the back
The dermis of the body walls is formed from this type of mesoderm
Lateral plate mesoderm
Myoblasts originate and migrate from which lip of the somite?
Epimeres originate from which portion of the myotome and are innervated by which rami?
Dorsal lip, dorsal rami
Epimeres give rise to which muscles?
Intrinsic back muscles
Hypomeres are innervated by which rami and arise from which portion of the myotome?
Ventral lip, ventral rami
Hypomeres give rise to which muscles?
A fracture at which areas of the upper limb would cause stunted growth?
Wrist or shoulder
A fracture at which areas of the lower limb would cause stunted growth?
Distal femur, proximal tibia
The anterior membranous neurocranium develops from...
Neural crest cells
The posterior membranous neurocranium develops from...
Cartilaginous viscerocranium arise from which germ layer?
Neural crest cells (aka 4th germ layer) of the pharyngeal arches
Premature closure of the sagittal suture results in:
Premature closure of the coronal suture results in:
Determines the growth of the limb bud
Apical Ectodermal Ridge
Muscles in the anterior compartment of the arm are innervated by what division of the brachial plexus?
Muscles of the anterior compartment of the thigh are innervated by nerves from which division of the lumbar plexus?
Lack of body wall musculature caused by a lack of migration of myoblasts or neural crest cells
Prune Belly Syndrome
Waddling gait in toddlers is indicative of what syndrome?
Neural crest cells give rise to which bones of the skull?
- Anterior neurocranium
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