Flashcards in 22 - Brain Deck (93)
What makes up the CNS?
What makes up the PNS?
What makes up the ANS?
Formation of nervous system occurs during the embryonic stage from the end of _______ week to the end of ________ week.
Superior (anterior or cranial) neuropore closes by day ______.
Inferior (posterior or caudal) neuropore closes by day ______.
The tripartite brain consists of what?
The tripartite brain then divides into the pentapartite brain. The prosencephalon becomes _________ and _________; mesencephalon; and rhombencephalon becomes _________ and _________.
Telencephalon (most anterior)
The prosencephalon is not divided into ______ and ______ plates like rest of neural tube.
There are two pairs of evaginations from the prosencephalon which are...
Telencephalic vesicles become what?
Optic vesicles become what?
Retinas of the eye
Associate with diencephalon
Subphylum craniata (newer term for subphylum vertebrata) has two subgroups, which are...
Hagfishes (craniates without vertebrae)
Vertebrates (craniates with vertebrae)
The cranial end of the neural tube of all craniates is characterized by three primary brain vesicles, which are...
The prosencephalon is the future...
The mesencephalon is the future...
The rhombencephalon is the future...
The cranial end of the neural tube of all craniates is characterized by three primary brain vesicles. The differentiation of these vesicles occurs through localized thickenings of lateral walls and floor, and _________.
What is the major derivative of the myelencephalon that becomes continuous with the spinal cord?
In this fish, the myelencephalon ism ore developed than other areas of the brain. Large neurons run the length of the tail, thought to be involved in swimming. (Myelencephalon is well developed in all the rest of the vertebrates).
Gray matter in the mesencephalon is organized into discrete _______ interspersed among myelinated (white) fiber tracts.
Gray matter in the spinal cord is continuous and is located more centrally and surrounded by myelinated fiber _______.
This type of fish have vagal lobes associated with myelencephalon. The site of sensory nucleus (nucleus solitarius) in alar plate which may cause an enormous bulge on either side of the brainstem. May be associated with sense of taste.
In these, vagal lobes disappear from myelencephalon.
In these, the myelencephalon is well-developed.
What are the components of the brainstem?
In general, the ________ is made up of a mixture of long fiber pathways, 10 of 12 cranial nerves that enter and leave, well-organized nuclei, and a network of cells which forms the ________ reticular formation.
In the brainstem, most of the nuclei are related directly to...
Cranial nerve functions
Motor control pathways
List the descending tracts in the medulla.
Spinal tract V
Medial longitudinal fasciculus