Flashcards in Embryology Deck (11):
What does the neural tube become?
Brain & Spinal Cord
What does the mesencephalon (midbrain) develop into?
Tectum, Tegmentum, Cerebral Peduncles
Where is the oculomotor and trochlear nucleus?
What does alar plate and basal plate become?
Alar = sensory = dorsal root
Basal = motor = ventral root
What is a positive babinski and when should it end?
Extending toes when you run a stick along bottom of foot.
During 1-2nd year of life.
What does the Neural canal form?
Ventricular system (ventricles of brac & central canal of spinal cord)
What does the neural crest form?
PNS + many non-neural derivatives & dorsal root ganglia = primary sensory neurons
-All sensory ganglia, schwann cells, enteric nerves, satellite cells
What does the neural plate become?
Neural plate -> neural folds -> neural groove -> neural crest & neural tube (becomes alar and basal plate)
What ventricle is associated with each secondary vesicle (development)?
Telencephalon - Lateral ventricle
Diencephalon - Third ventricle
Mesencephalon - Cerebral aquaduct
Metencephalon - Fourth ventricle
Myelenecephalon - Fourth ventricle
What causes syringomyelia?
Tubular cavitation of spinal cord (usually cervical or in upper thoracic region)
-Involves fibers crossing in ventral white commissure and eventually ventral horns and corticospinal tracts
-Initial signs = loss of pain & temp over shoulders and down arms due to damage of the fibers crossing in the ventral white commissure
-Often associated with Chiari type I malformation