Nervous System General Flashcards
anatomical division
where nerves situated
central nervous system
protected in boney cavities
ex: spinal cord
peripheral nervous system
do not need to open cavity
ex: cranial nerves
somatic nervous system
voluntary
autonomic nervous system
involuntary
ex: heart
ectoderm
neural tissue, most superficial
mesoderm
form structure in middle of body
endoderm
epithelium of digestive and respiratory systems
most internal layer
neural plate
formed by ectoderm dorsal to notochord of mesoderm
neural groove
cells in neural plate form
neural crests
form most of PNS including ganglia
neural tube
formed by rest of cells in neural groove
forms CNS including spinal cord
pyramidal decussation
limit between spinal cord and brainstem
place where upper motor neurons cross over to opposite side of spinal cord
medullary cone
caudal end of spinal cord
longer in cats (S2-3) than dogs(L6-7)
sesnory/ afferent
from the body toward CNS
