Development of the Nervous System Flashcards
What part of the CNS processes the reflexes?
Reflexes (fast, involuntary) are processed by the spinal cord.
When it reaches the cerebral cortex it is a voluntary response.
What component of the PNS are Spinal nerves?
The somatic component.
Which Rami innervate the limbs?
The ventral rami
Which structure induces the neural plate?
The notochord
From which structure does the CNS originates?
From the neural tube.
From which structure does the PNS originate?
From the Neural Crest Cells.
Which is the neural tube deffect where the meningeal sac and the CNS structures portrude?
Meningomyelocele
To what part of the NS gives rise the nueroepithelial cells (from the wall of the neural tube)?
Give rise to the CNS and glia.
Cells in the basal plate will give rise to…
Motor neurons
Cells in the alar plate will give rise to…
Recipients of sensory information.
What molecules induce differentation of the plates?
The Sonic Hedgehog secreted by the notochord and the BMPs released by the ectoderm.
What does the dorsal rami innervate?
The intrinsic muscles of the back.
What does the ventral rami innervate?
The anterolateral body walls and limbs.
Which type of fibers does the ventral root contain?
Motor fibers
Which type of fibers does the dorsal root contain?
Sensory fibers.
